2025
|
Shibaev, Egor; Ustyuzhanin, Andrey Towards invertible 2D crystal structure representation for efficient downstream task execution 2D MATERIALS, 12 (1), 2025, DOI: 10.1088/2053-1583/ad8801. Abstract | BibTeX | Endnote @article{ISI:001341533000001,
title = {Towards invertible 2D crystal structure representation for efficient downstream task execution},
author = {Egor Shibaev and Andrey Ustyuzhanin},
doi = {10.1088/2053-1583/ad8801},
times_cited = {0},
issn = {2053-1583},
year = {2025},
date = {2025-01-01},
journal = {2D MATERIALS},
volume = {12},
number = {1},
publisher = {IOP Publishing Ltd},
address = {TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND},
abstract = {In the study of MoS2 lattice defects, we explore the use of Siamese neural networks to create invariant embeddings, which respect the crystalline symmetry of the lattice. By training our model with contrastive learning, we successfully differentiate configurations with varying defects, achieving perfect accuracy in recognizing equivalent placements. Our method showcases the capability to predict physical properties like formation energy per site and the bandgap with strong performance across both low and high-defect density scenarios, outperforming traditional methods when enhanced with polynomial features. Despite its effectiveness, the model presents limitations at high defect densities, indicating a need for further refinement. Our approach lays the groundwork for reverse-engineering processes. Thus, we open pathways for generative models that can navigate from specified property ranges to optimal defect configurations, fostering an efficient solution-space exploration for bespoke material synthesis.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
In the study of MoS2 lattice defects, we explore the use of Siamese neural networks to create invariant embeddings, which respect the crystalline symmetry of the lattice. By training our model with contrastive learning, we successfully differentiate configurations with varying defects, achieving perfect accuracy in recognizing equivalent placements. Our method showcases the capability to predict physical properties like formation energy per site and the bandgap with strong performance across both low and high-defect density scenarios, outperforming traditional methods when enhanced with polynomial features. Despite its effectiveness, the model presents limitations at high defect densities, indicating a need for further refinement. Our approach lays the groundwork for reverse-engineering processes. Thus, we open pathways for generative models that can navigate from specified property ranges to optimal defect configurations, fostering an efficient solution-space exploration for bespoke material synthesis. - FNClarivate Analytics Web of Science
- VR1.0
- PTJ
- AUShibaev, E
Ustyuzhanin, A
- AFEgor Shibaev
Andrey Ustyuzhanin
- TITowards invertible 2D crystal structure representation for efficient downstream task execution
- SO2D MATERIALS
- LAEnglish
- DTArticle
- DESiamese Neural Networks (SNN); Invariant Embeddings; MoS2 Lattice Defects; Contrastive Learning; Physical Property Prediction
- ABIn the study of MoS2 lattice defects, we explore the use of Siamese neural networks to create invariant embeddings, which respect the crystalline symmetry of the lattice. By training our model with contrastive learning, we successfully differentiate configurations with varying defects, achieving perfect accuracy in recognizing equivalent placements. Our method showcases the capability to predict physical properties like formation energy per site and the bandgap with strong performance across both low and high-defect density scenarios, outperforming traditional methods when enhanced with polynomial features. Despite its effectiveness, the model presents limitations at high defect densities, indicating a need for further refinement. Our approach lays the groundwork for reverse-engineering processes. Thus, we open pathways for generative models that can navigate from specified property ranges to optimal defect configurations, fostering an efficient solution-space exploration for bespoke material synthesis.
- C1[Shibaev, Egor; Ustyuzhanin, Andrey] Constructor Univ, D-28759 Bremen, Germany.
[Ustyuzhanin, Andrey] Natl Univ Singapore, Inst Funct Intelligent Mat, 4 Sci Dr 2, Singapore 117544, Singapore - C3National University of Singapore; Institute for Functional Intelligent Materials (I-FIM)
- RPShibaev, E (corresponding author), Constructor Univ, D-28759 Bremen, Germany
- FUNational Research Foundation, Singapore under its AI Singapore Programme [AISG3-RP-2022-028]
- FXThis research/project is supported by the National Research Foundation, Singapore under its AI Singapore Programme (AISG Award No: AISG3-RP-2022-028).
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- J92D MATER
- JI2D Mater.
- PDJAN 1
- PY2025
- VL12
- DI10.1088/2053-1583/ad8801
- PG13
- WCMaterials Science, Multidisciplinary
- SCMaterials Science
- GAK1K1Y
- UTWOS:001341533000001
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- EF
|
2024
|
Lin, Mo; Trubianov, Maxim; Yang, Kou; Chen, Siyu; Wang, Qian; Wu, Jiqiang; Liao, Xiaojian; Greiner, Andreas; Novoselov, Kostya S; Andreeva, Daria V Lightweight acoustic hyperbolic paraboloid diaphragms with graphene through self-assembly nanoarchitectonics SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS, 25 (1), 2024, DOI: 10.1080/14686996.2024.2421757. Abstract | BibTeX | Endnote @article{ISI:001358284700001,
title = {Lightweight acoustic hyperbolic paraboloid diaphragms with graphene through self-assembly nanoarchitectonics},
author = {Mo Lin and Maxim Trubianov and Kou Yang and Siyu Chen and Qian Wang and Jiqiang Wu and Xiaojian Liao and Andreas Greiner and Kostya S Novoselov and Daria V Andreeva},
doi = {10.1080/14686996.2024.2421757},
times_cited = {0},
issn = {1468-6996},
year = {2024},
date = {2024-12-31},
journal = {SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS},
volume = {25},
number = {1},
publisher = {TAYLOR & FRANCIS LTD},
address = {2-4 PARK SQUARE, MILTON PARK, ABINGDON OR14 4RN, OXON, ENGLAND},
abstract = {The paper presents a study on the fabrication of a lightweight acoustic hyperbolic paraboloid (HyPar) diaphragm using self-assembly nanoarchitectonics. The diaphragm is composed of a polyacrylonitrile (PAN) network combined with graphene oxide (GO) nanolayers. Spray coating is employed as a fabrication method, providing a simple and cost-effective approach to create large-scale curved diaphragms. The results demonstrate that the PAN/GO diaphragm exhibits acoustic performance comparable to a commercially available banana pulp diaphragm while significantly reducing weight and thickness. Notably, the graphene-based diaphragm is 15 times thinner and 8 times lighter than the commercial banana pulp diaphragm. This thinner and lighter nature of the graphene-based diaphragm offers advantages in applications where weight and size constraints are critical, such as in portable audio devices or acoustic sensors.},
keywords = {},
pubstate = {published},
tppubtype = {article}
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The paper presents a study on the fabrication of a lightweight acoustic hyperbolic paraboloid (HyPar) diaphragm using self-assembly nanoarchitectonics. The diaphragm is composed of a polyacrylonitrile (PAN) network combined with graphene oxide (GO) nanolayers. Spray coating is employed as a fabrication method, providing a simple and cost-effective approach to create large-scale curved diaphragms. The results demonstrate that the PAN/GO diaphragm exhibits acoustic performance comparable to a commercially available banana pulp diaphragm while significantly reducing weight and thickness. Notably, the graphene-based diaphragm is 15 times thinner and 8 times lighter than the commercial banana pulp diaphragm. This thinner and lighter nature of the graphene-based diaphragm offers advantages in applications where weight and size constraints are critical, such as in portable audio devices or acoustic sensors. - FNClarivate Analytics Web of Science
- VR1.0
- PTJ
- AULin, M
Trubianov, M
Yang, K
Chen, SY
Wang, Q
Wu, JQ
Liao, XJ
Greiner, A
Novoselov, KS
Andreeva, DV
- AFMo Lin
Maxim Trubianov
Kou Yang
Siyu Chen
Qian Wang
Jiqiang Wu
Xiaojian Liao
Andreas Greiner
Kostya S Novoselov
Daria V Andreeva
- TILightweight acoustic hyperbolic paraboloid diaphragms with graphene through self-assembly nanoarchitectonics
- SOSCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS
- LAEnglish
- DTArticle
- DEGraphene Oxide; Polyacrylonitrile Fibres; Nanoarchitectonics; Hyperbolic Paraboloid Shape; Acoustic Diaphragm
- IDNANOCOMPOSITES
- ABThe paper presents a study on the fabrication of a lightweight acoustic hyperbolic paraboloid (HyPar) diaphragm using self-assembly nanoarchitectonics. The diaphragm is composed of a polyacrylonitrile (PAN) network combined with graphene oxide (GO) nanolayers. Spray coating is employed as a fabrication method, providing a simple and cost-effective approach to create large-scale curved diaphragms. The results demonstrate that the PAN/GO diaphragm exhibits acoustic performance comparable to a commercially available banana pulp diaphragm while significantly reducing weight and thickness. Notably, the graphene-based diaphragm is 15 times thinner and 8 times lighter than the commercial banana pulp diaphragm. This thinner and lighter nature of the graphene-based diaphragm offers advantages in applications where weight and size constraints are critical, such as in portable audio devices or acoustic sensors.
- C1[Lin, Mo; Trubianov, Maxim; Yang, Kou; Chen, Siyu; Wang, Qian; Wu, Jiqiang; Novoselov, Kostya S.; Andreeva, Daria V.] Natl Univ Singapore, Inst Funct Intelligent Mat, Dept Mat Sci & Engn, Singapore, Singapore.
[Yang, Kou] Guangdong Univ Technol, Sch Chem Engn & Light Ind, Guangzhou, Peoples R China. [Liao, Xiaojian] Tianjin Univ, Sch Mat Sci & Engn, Tianjin, Peoples R China. [Greiner, Andreas] Univ Bayreuth, Macromol Chem & Bavarian Polymer Inst, Bayreuth, Germany - C3National University of Singapore; Institute for Functional Intelligent Materials (I-FIM); Guangdong University of Technology; Tianjin University; University of Bayreuth
- RPAndreeva, DV (corresponding author), Natl Univ Singapore, Inst Funct Intelligent Mat, 4 Sci Dr 2, Singapore 117544, Singapore
- FUMinistry of Education (Singapore) through the Research Centre of Excellence program [EDUN C-33-18-279-V12]; Deutsche Forschungsgemeinschaft [431073172]
- FXThis research was supported by the Ministry of Education (Singapore) through the Research Centre of Excellence program (Award EDUN C-33-18-279-V12, Institute for Functional Intelligent Materials). XJ and AG are indebted to the Deutsche Forschungsgemeinschaft for the financial support [grant number: 431073172].
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- JISci. Technol. Adv. Mater.
- PDDEC 31
- PY2024
- VL25
- DI10.1080/14686996.2024.2421757
- PG10
- WCMaterials Science, Multidisciplinary
- SCMaterials Science
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- UTWOS:001358284700001
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- EF
|
Wu, Ao; Badrtdinov, Danis I; Lee, Woncheol; Rosner, Malte; Dreyer, Cyrus E; Koperski, Maciej Ab initio methods applied to carbon-containing defects in hexagonal boron nitride MATERIALS TODAY SUSTAINABILITY, 28 , 2024, DOI: 10.1016/j.mtsust.2024.100988. Abstract | BibTeX | Endnote @article{ISI:001334063800001,
title = {Ab initio methods applied to carbon-containing defects in hexagonal boron nitride},
author = {Ao Wu and Danis I Badrtdinov and Woncheol Lee and Malte Rosner and Cyrus E Dreyer and Maciej Koperski},
doi = {10.1016/j.mtsust.2024.100988},
times_cited = {0},
issn = {2589-2347},
year = {2024},
date = {2024-12-01},
journal = {MATERIALS TODAY SUSTAINABILITY},
volume = {28},
publisher = {ELSEVIER},
address = {RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS},
abstract = {The functionalities activated by defect centers in solids are constantly growing, opening new avenues for sustainable future technologies. These may extend to quantum optoelectronics if suitable defect centers are created and their properties understood. Recent progress in developing quantum emitters in hexagonal boron nitride (hBN) associated with carbon impurities enabled the realization of such concepts in atomically thin films, where the defect centers exhibit an unprecedented level of sensitivity toward the environment. The complexity of defects, together with new control knobs provided by van der Waals technology, poses a challenge for theory to accurately predict the properties of defect centers and to match them with experimental results. Here, we review the ab initio methods applied to carbon-containing defect centers in hBN, exploring the predictive capabilities of different levels of theory for their structural and optoelectronic properties.},
keywords = {},
pubstate = {published},
tppubtype = {article}
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The functionalities activated by defect centers in solids are constantly growing, opening new avenues for sustainable future technologies. These may extend to quantum optoelectronics if suitable defect centers are created and their properties understood. Recent progress in developing quantum emitters in hexagonal boron nitride (hBN) associated with carbon impurities enabled the realization of such concepts in atomically thin films, where the defect centers exhibit an unprecedented level of sensitivity toward the environment. The complexity of defects, together with new control knobs provided by van der Waals technology, poses a challenge for theory to accurately predict the properties of defect centers and to match them with experimental results. Here, we review the ab initio methods applied to carbon-containing defect centers in hBN, exploring the predictive capabilities of different levels of theory for their structural and optoelectronic properties. - FNClarivate Analytics Web of Science
- VR1.0
- PTJ
- AUWu, A
Badrtdinov, DI
Lee, WC
Rösner, M
Dreyer, CE
Koperski, M
- AFAo Wu
Danis I Badrtdinov
Woncheol Lee
Malte Rosner
Cyrus E Dreyer
Maciej Koperski
- TIAb initio methods applied to carbon-containing defects in hexagonal boron nitride
- SOMATERIALS TODAY SUSTAINABILITY
- LAEnglish
- DTArticle
- DEQuantum Defects; Ab Initio Methods; Density Functional Theory; Quantum Embedding; Structural And Electronic Properties
- IDELECTRONIC-STRUCTURE CALCULATIONS; STRONGLY CORRELATED STATES; DENSITY-FUNCTIONAL-THEORY; SINGLE-PHOTON EMITTERS; GREENS-FUNCTION; EMBEDDING METHODS; QUANTUM EMITTERS; POINT-DEFECTS; ENERGY; FIELD
- ABThe functionalities activated by defect centers in solids are constantly growing, opening new avenues for sustainable future technologies. These may extend to quantum optoelectronics if suitable defect centers are created and their properties understood. Recent progress in developing quantum emitters in hexagonal boron nitride (hBN) associated with carbon impurities enabled the realization of such concepts in atomically thin films, where the defect centers exhibit an unprecedented level of sensitivity toward the environment. The complexity of defects, together with new control knobs provided by van der Waals technology, poses a challenge for theory to accurately predict the properties of defect centers and to match them with experimental results. Here, we review the ab initio methods applied to carbon-containing defect centers in hBN, exploring the predictive capabilities of different levels of theory for their structural and optoelectronic properties.
- C1[Wu, Ao; Koperski, Maciej] Natl Univ Singapore, Dept Mat Sci & Engn, Singapore 117575, Singapore.
[Wu, Ao; Koperski, Maciej] Natl Univ Singapore, Inst Funct Intelligent Mat, Singapore 117544, Singapore. [Badrtdinov, Danis I.; Rosner, Malte] Radboud Univ Nijmegen, Inst Mol & Mat, Heijendaalseweg 135, NL-6525 AJ Nijmegen, Netherlands. [Lee, Woncheol] Univ Calif Santa Barbara, Mat Dept, Santa Barbara, CA 93106 USA. [Dreyer, Cyrus E.] Flatiron Inst, Ctr Computat Quantum Phys, 162 5th Ave, New York, NY 10010 USA. [Dreyer, Cyrus E.] SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA - C3National University of Singapore; Institute for Functional Intelligent Materials (I-FIM); National University of Singapore; Radboud University Nijmegen; University of California System; University of California Santa Barbara; State University of New York (SUNY) System; Stony Brook University
- RPKoperski, M (corresponding author), Natl Univ Singapore, Inst Funct Intelligent Mat, Singapore 117544, Singapore
- FUMinistry of Education (Singapore) through the Research Centre of Excellence program [EDUN C-33-18-279-V12]; AcRF Tier 3, Singapore [MOE2018-T3-1-005]; Ministry of Education, Singapore [MOE-T2EP50122-0012]; Air Force Office of Scientific Research [FA8655-21-1-7026]; Office of Naval Research Global, United States [DMR-2237674]; Simons Foundation; National Science Foundation, United States
- FXThis project was supported by the Ministry of Education (Singapore) through the Research Centre of Excellence program (grant EDUN C-33-18-279-V12, I-FIM) , AcRF Tier 3, Singapore (MOE2018-T3-1-005) . This research is supported by the Ministry of Education, Singapore, under its Academic Research Fund Tier 2 (MOE-T2EP50122-0012) . This material is based upon work supported by the Air Force Office of Scientific Research and the Office of Naval Research Global, United States under award number FA8655-21-1-7026. MR thanks the Simons Foundation for hospitality. CED acknowledges support from National Science Foundation, United States Grant No. DMR-2237674. The Flatiron Institute is a division of the Simons Foundation.
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- PDDEC
- PY2024
- VL28
- DI10.1016/j.mtsust.2024.100988
- PG14
- WCGreen & Sustainable Science & Technology; Materials Science, Multidisciplinary
- SCScience & Technology - Other Topics; Materials Science
- GAJ0L1F
- UTWOS:001334063800001
- ER
- EF
|
Loh, Leyi; Ho, Yi Wei; Xuan, Fengyuan; del Aguila, Andres Granados; Chen, Yuan; Wong, See Yoong; Zhang, Jingda; Wang, Zhe; Watanabe, Kenji; Taniguchi, Takashi; Pigram, Paul J; Bosman, Michel; Quek, Su Ying; Koperski, Maciej; Eda, Goki Nb impurity-bound excitons as quantum emitters in monolayer WS2 NATURE COMMUNICATIONS, 15 (1), 2024, DOI: 10.1038/s41467-024-54360-5. Abstract | BibTeX | Endnote @article{ISI:001360396900001,
title = {Nb impurity-bound excitons as quantum emitters in monolayer WS_{2}},
author = {Leyi Loh and Yi Wei Ho and Fengyuan Xuan and Andres Granados del Aguila and Yuan Chen and See Yoong Wong and Jingda Zhang and Zhe Wang and Kenji Watanabe and Takashi Taniguchi and Paul J Pigram and Michel Bosman and Su Ying Quek and Maciej Koperski and Goki Eda},
doi = {10.1038/s41467-024-54360-5},
times_cited = {0},
year = {2024},
date = {2024-11-20},
journal = {NATURE COMMUNICATIONS},
volume = {15},
number = {1},
publisher = {NATURE PORTFOLIO},
address = {HEIDELBERGER PLATZ 3, BERLIN, 14197, GERMANY},
abstract = {Point defects in crystalline solids behave as optically addressable individual quantum systems when present in sufficiently low concentrations. In two-dimensional (2D) semiconductors, such quantum defects hold potential as versatile single photon sources. Here, we report the synthesis and optical properties of Nb-doped monolayer WS2 in the dilute limit where the average spacing between individual dopants exceeds the optical diffraction limit, allowing the emission spectrum to be studied at the single-dopant level. We show that these individual dopants exhibit common features of quantum emitters, including narrow emission lines (with linewidths <1 meV), strong spatial confinement, and photon antibunching. These emitters consistently occur within a narrow spectral range across multiple samples, distinct from common quantum emitters in van der Waals (vdW) materials that show large ensemble broadening. Analysis of the Zeeman splitting reveals that they can be attributed to bound exciton complexes comprising dark excitons and negatively charged Nb.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Point defects in crystalline solids behave as optically addressable individual quantum systems when present in sufficiently low concentrations. In two-dimensional (2D) semiconductors, such quantum defects hold potential as versatile single photon sources. Here, we report the synthesis and optical properties of Nb-doped monolayer WS2 in the dilute limit where the average spacing between individual dopants exceeds the optical diffraction limit, allowing the emission spectrum to be studied at the single-dopant level. We show that these individual dopants exhibit common features of quantum emitters, including narrow emission lines (with linewidths <1 meV), strong spatial confinement, and photon antibunching. These emitters consistently occur within a narrow spectral range across multiple samples, distinct from common quantum emitters in van der Waals (vdW) materials that show large ensemble broadening. Analysis of the Zeeman splitting reveals that they can be attributed to bound exciton complexes comprising dark excitons and negatively charged Nb. - FNClarivate Analytics Web of Science
- VR1.0
- PTJ
- AULoh, L
Ho, YW
Xuan, FY
del Aguila, AG
Chen, Y
Wong, SY
Zhang, JD
Wang, Z
Watanabe, K
Taniguchi, T
Pigram, PJ
Bosman, M
Quek, SY
Koperski, M
Eda, G
- AFLeyi Loh
Yi Wei Ho
Fengyuan Xuan
Andres Granados del Aguila
Yuan Chen
See Yoong Wong
Jingda Zhang
Zhe Wang
Kenji Watanabe
Takashi Taniguchi
Paul J Pigram
Michel Bosman
Su Ying Quek
Maciej Koperski
Goki Eda
- TINb impurity-bound excitons as quantum emitters in monolayer WS2
- SONATURE COMMUNICATIONS
- LAEnglish
- DTArticle
- IDCOLOR-CENTERS; ENERGY
- ABPoint defects in crystalline solids behave as optically addressable individual quantum systems when present in sufficiently low concentrations. In two-dimensional (2D) semiconductors, such quantum defects hold potential as versatile single photon sources. Here, we report the synthesis and optical properties of Nb-doped monolayer WS2 in the dilute limit where the average spacing between individual dopants exceeds the optical diffraction limit, allowing the emission spectrum to be studied at the single-dopant level. We show that these individual dopants exhibit common features of quantum emitters, including narrow emission lines (with linewidths <1 meV), strong spatial confinement, and photon antibunching. These emitters consistently occur within a narrow spectral range across multiple samples, distinct from common quantum emitters in van der Waals (vdW) materials that show large ensemble broadening. Analysis of the Zeeman splitting reveals that they can be attributed to bound exciton complexes comprising dark excitons and negatively charged Nb.
- C1[Loh, Leyi; Ho, Yi Wei; Zhang, Jingda; Quek, Su Ying; Eda, Goki] Natl Univ Singapore, Dept Phys, Singapore, Singapore.
[Loh, Leyi; Bosman, Michel; Quek, Su Ying; Koperski, Maciej] Natl Univ Singapore, Dept Mat Sci & Engn, Singapore, Singapore. [Ho, Yi Wei; del Aguila, Andres Granados; Koperski, Maciej] Natl Univ Singapore, Inst Funct Intelligent Mat, Singapore, Singapore. [Xuan, Fengyuan; Quek, Su Ying; Eda, Goki] Natl Univ Singapore, Ctr Adv 2D Mat, Singapore, Singapore. [Chen, Yuan; Wang, Zhe; Eda, Goki] Natl Univ Singapore, Dept Chem, Singapore, Singapore. [Wong, See Yoong; Pigram, Paul J.] La Trobe Univ Melbourne, Ctr Mat & Surface Sci, Melbourne, Vic, Australia. [Wong, See Yoong; Pigram, Paul J.] La Trobe Univ Melbourne, Dept Math & Phys Sci, Melbourne, Vic, Australia. [Watanabe, Kenji] Natl Inst Mat Sci, Res Ctr Funct Mat, Tsukuba, Japan. [Taniguchi, Takashi] Natl Inst Mat Sci, Int Ctr Mat Nanoarchitectron, Tsukuba, Japan. [Quek, Su Ying] Natl Univ Singapore, NUS Grad Sch, Integrat Sci & Engn Programme, Singapore, Singapore. [Quek, Su Ying] Natl Univ Singapore, NUS Coll, Singapore, Singapore - C3National University of Singapore; National University of Singapore; Institute for Functional Intelligent Materials (I-FIM); National University of Singapore; National University of Singapore; National University of Singapore; La Trobe University; La Trobe University; National Institute for Materials Science; National Institute for Materials Science; National University of Singapore; National University of Singapore
- RPQuek, SY (corresponding author), Natl Univ Singapore, Dept Phys, Singapore, Singapore; Quek, SY (corresponding author), Natl Univ Singapore, Dept Mat Sci & Engn, Singapore, Singapore; Koperski, M (corresponding author), Natl Univ Singapore, Inst Funct Intelligent Mat, Singapore, Singapore; Quek, SY (corresponding author), Natl Univ Singapore, Ctr Adv 2D Mat, Singapore, Singapore; Eda, G (corresponding author), Natl Univ Singapore, Dept Chem, Singapore, Singapore; Quek, SY (corresponding author), Natl Univ Singapore, NUS Grad Sch, Integrat Sci & Engn Programme, Singapore, Singapore; Quek, SY (corresponding author), Natl Univ Singapore, NUS Coll, Singapore, Singapore
- FUMinistry of Education (MOE), Singapore under AcRF Tier 3 [MOE2018-T3-1-005]; Singapore National Research Foundation [EDUN C-33-18-279-V12]; Ministry of Education (Singapore) through the Research Centre of Excellence program [FA8655-21-1-7026]; Air Force European Office of Aerospace Research and Development Office of Scientific Research [T2EP50122-0012]; Office of Naval Research Global [2022/46/E/ST3/00166]; Ministry of Education, Singapore [R-284-000-179-133]; National Science Centre, Poland [19H05790, 20H00354, 21H05233]; National University of Singapore; MOE; MOE's AcRF Tier 1; JSPS KAKENHI
- FXThe authors acknowledge support from the Ministry of Education (MOE), Singapore, under AcRF Tier 3 (MOE2018-T3-1-005) and the Singapore National Research Foundation for funding the research under medium-sized centre programme. This project was supported by the Ministry of Education (Singapore) through the Research Centre of Excellence program (grant EDUN C-33-18-279-V12, I-FIM). This material was based upon work supported by the Air Force European Office of Aerospace Research and Development Office of Scientific Research and the Office of Naval Research Global under award number FA8655-21-1-7026. This research is supported by the Ministry of Education, Singapore, under its Academic Research Fund Tier 2 (T2EP50122-0012). The work was supported by the National Science Centre, Poland (grant no. 2022/46/E/ST3/00166). S.Y.Q. acknowledges computational resources at the CA2DM cluster and at the National Supercomputing Centre (NSCC) in Singapore, and funding from the National University of Singapore and MOE. L.L. and M.B. acknowledge support from MOE's AcRF Tier 1 (R-284-000-179-133). This work was performed in part at the Australian National Fabrication Facility (ANFF), a company established under the National Collaborative Research Infrastructure Strategy, through the La Trobe University Centre for Materials and Surface Science. K.W. and T.T. acknowledge support from JSPS KAKENHI (Grant Numbers 19H05790, 20H00354 and 21H05233).
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- PUNATURE PORTFOLIO
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- PAHEIDELBERGER PLATZ 3, BERLIN, 14197, GERMANY
- J9NAT COMMUN
- JINat. Commun.
- PDNOV 20
- PY2024
- VL15
- DI10.1038/s41467-024-54360-5
- PG9
- WCMultidisciplinary Sciences
- SCScience & Technology - Other Topics
- GAM9A9D
- UTWOS:001360396900001
- ER
- EF
|
Yadav, Renu; Poudyal, Saroj; Biswal, Bubunu; Rajarapu, Ramesh; Barman, Prahalad Kanti; Novoselov, Kostya S; Misra, Abhishek Investigation of resistive switching behavior driven by active and passive electrodes in MoO2-MoS2 core shell nanowire memristors APPLIED PHYSICS LETTERS, 125 (21), 2024, DOI: 10.1063/5.0233927. Abstract | BibTeX | Endnote @article{ISI:001357983500001,
title = {Investigation of resistive switching behavior driven by active and passive electrodes in MoO_{2}-MoS_{2} core shell nanowire memristors},
author = {Renu Yadav and Saroj Poudyal and Bubunu Biswal and Ramesh Rajarapu and Prahalad Kanti Barman and Kostya S Novoselov and Abhishek Misra},
doi = {10.1063/5.0233927},
times_cited = {0},
issn = {0003-6951},
year = {2024},
date = {2024-11-18},
journal = {APPLIED PHYSICS LETTERS},
volume = {125},
number = {21},
publisher = {AIP Publishing},
address = {1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA},
abstract = {Memristive devices based on layered materials have the potential to enable low power electronics with ultra-fast operations toward the development of next generation memory and computing technologies. Memristor performance and switching behavior crucially depend on the switching matrix and on the type of electrodes used. In this work, we investigate the effect of different electrodes in 1D MoO2-MoS2 core shell nanowire memristors by highlighting their role in achieving distinct switching behavior. Analog and digital resistive switching are realized with carbon based passive (multi-layer graphene and multiwall carbon nanotube) and 3D active metal (silver and nickel) electrodes, respectively. Temperature dependent electrical transport studies of the conducting filament down to cryogenic temperatures reveal its semiconducting and metallic nature for passive and active top electrodes, respectively. These investigations shed light on the physics of the filament formation and provide a knob to design and develop the memristors with specific switching characteristics for desired end uses.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Memristive devices based on layered materials have the potential to enable low power electronics with ultra-fast operations toward the development of next generation memory and computing technologies. Memristor performance and switching behavior crucially depend on the switching matrix and on the type of electrodes used. In this work, we investigate the effect of different electrodes in 1D MoO2-MoS2 core shell nanowire memristors by highlighting their role in achieving distinct switching behavior. Analog and digital resistive switching are realized with carbon based passive (multi-layer graphene and multiwall carbon nanotube) and 3D active metal (silver and nickel) electrodes, respectively. Temperature dependent electrical transport studies of the conducting filament down to cryogenic temperatures reveal its semiconducting and metallic nature for passive and active top electrodes, respectively. These investigations shed light on the physics of the filament formation and provide a knob to design and develop the memristors with specific switching characteristics for desired end uses. - FNClarivate Analytics Web of Science
- VR1.0
- PTJ
- AUYadav, R
Poudyal, S
Biswal, B
Rajarapu, R
Barman, PK
Novoselov, KS
Misra, A
- AFRenu Yadav
Saroj Poudyal
Bubunu Biswal
Ramesh Rajarapu
Prahalad Kanti Barman
Kostya S Novoselov
Abhishek Misra
- TIInvestigation of resistive switching behavior driven by active and passive electrodes in MoO2-MoS2 core shell nanowire memristors
- SOAPPLIED PHYSICS LETTERS
- LAEnglish
- DTArticle
- IDMEMORY
- ABMemristive devices based on layered materials have the potential to enable low power electronics with ultra-fast operations toward the development of next generation memory and computing technologies. Memristor performance and switching behavior crucially depend on the switching matrix and on the type of electrodes used. In this work, we investigate the effect of different electrodes in 1D MoO2-MoS2 core shell nanowire memristors by highlighting their role in achieving distinct switching behavior. Analog and digital resistive switching are realized with carbon based passive (multi-layer graphene and multiwall carbon nanotube) and 3D active metal (silver and nickel) electrodes, respectively. Temperature dependent electrical transport studies of the conducting filament down to cryogenic temperatures reveal its semiconducting and metallic nature for passive and active top electrodes, respectively. These investigations shed light on the physics of the filament formation and provide a knob to design and develop the memristors with specific switching characteristics for desired end uses.
- C3Indian Institute of Technology System (IIT System); Indian Institute of Technology (IIT) - Madras; Indian Institute of Technology System (IIT System); Indian Institute of Technology (IIT) - Madras; National University of Singapore; Institute for Functional Intelligent Materials (I-FIM)
- RPMisra, A (corresponding author), Indian Inst Technol Madras, Dept Phys, Chennai 600036, India; Misra, A (corresponding author), Indian Inst Technol Madras, Ctr 2D Mat Res & Innovat, Chennai 600036, India
- FXWe acknowledge the financial support from the Ministry of Human Resource Development (MHRD), the Government of India (GOI) via STARS Grant (No. STARS/APR2019/NS/631/FS) and IIT Madras for setting up "Centre for 2D Materials Research and Innovations" through the Institute of Eminence scheme. We also acknowledge the CNNP, department of EE, MSRC, and ICSR at IIT Madras for providing device fabrication facilities. K.S.N. acknowledges support from the Ministry of Education, Singapore (Research Centre of Excellence award to the Institute for Functional Intelligent Materials, I-FIM, Project No. EDUNC-33-18-279-V12), the National Research Foundation, Singapore under its AI Singapore Programme (AISG Award No: AISG3-RP-2022-028), and from the Royal Society (UK, Grant No. RSRPR190000).
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- PUAIP Publishing
- PIMELVILLE
- PA1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
- SN0003-6951
- J9APPL PHYS LETT
- JIAppl. Phys. Lett.
- PDNOV 18
- PY2024
- VL125
- DI10.1063/5.0233927
- PG7
- WCPhysics, Applied
- SCPhysics
- GAM5M7W
- UTWOS:001357983500001
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- EF
|
Kipczak, Lucja; Zawadzka, Natalia; Jana, Dipankar; Antoniazzi, Igor; Grzeszczyk, Magdalena; Zinkiewicz, Malgorzata; Watanabe, Kenji; Taniguchi, Takashi; Potemski, Marek; Faugeras, Clement; Babinski, Adam; Molas, Maciej R Impact of temperature on the brightening of neutral and charged dark excitons in WSe2 monolayer NANOPHOTONICS, 2024, DOI: 10.1515/nanoph-2024-0385. Abstract | BibTeX | Endnote @article{ISI:001359230900001,
title = {Impact of temperature on the brightening of neutral and charged dark excitons in WSe_{2} monolayer},
author = {Lucja Kipczak and Natalia Zawadzka and Dipankar Jana and Igor Antoniazzi and Magdalena Grzeszczyk and Malgorzata Zinkiewicz and Kenji Watanabe and Takashi Taniguchi and Marek Potemski and Clement Faugeras and Adam Babinski and Maciej R Molas},
doi = {10.1515/nanoph-2024-0385},
times_cited = {0},
issn = {2192-8606},
year = {2024},
date = {2024-11-18},
journal = {NANOPHOTONICS},
publisher = {WALTER DE GRUYTER GMBH},
address = {GENTHINER STRASSE 13, D-10785 BERLIN, GERMANY},
abstract = {Optically dark states play an important role in the electronic and optical properties of monolayers (MLs) of semiconducting transition metal dichalcogenides. The effect of temperature on the in-plane-field activation of the neutral and charged dark excitons is investigated in a WSe2 ML encapsulated in hexagonal BN flakes. The brightening rates of the neutral dark (XD) and grey (XG) excitons and the negative dark trion (TD) differ substantially at particular temperature. More importantly, they weaken considerably by about 3-4 orders of magnitude with temperature increased from 4.2 K to 100 K. The quenching of the dark-related emissions is accompanied by the two-order-of-magnitude increase in the emissions of their neutral bright counterparts, i.e. neutral bright exciton (XB) and spin-singlet (TS) and spin-triplet (TT) negative trions, due to the thermal activations of dark states. Furthermore, the energy splittings between the dark XD and TD complexes and the corresponding bright XB, TS, and TT ones vary with temperature rises from 4.2 K to 100 K. This is explained in terms of the different exciton-phonon coupling for the bright and dark excitons stemming from their distinct symmetry properties.},
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Optically dark states play an important role in the electronic and optical properties of monolayers (MLs) of semiconducting transition metal dichalcogenides. The effect of temperature on the in-plane-field activation of the neutral and charged dark excitons is investigated in a WSe2 ML encapsulated in hexagonal BN flakes. The brightening rates of the neutral dark (XD) and grey (XG) excitons and the negative dark trion (TD) differ substantially at particular temperature. More importantly, they weaken considerably by about 3-4 orders of magnitude with temperature increased from 4.2 K to 100 K. The quenching of the dark-related emissions is accompanied by the two-order-of-magnitude increase in the emissions of their neutral bright counterparts, i.e. neutral bright exciton (XB) and spin-singlet (TS) and spin-triplet (TT) negative trions, due to the thermal activations of dark states. Furthermore, the energy splittings between the dark XD and TD complexes and the corresponding bright XB, TS, and TT ones vary with temperature rises from 4.2 K to 100 K. This is explained in terms of the different exciton-phonon coupling for the bright and dark excitons stemming from their distinct symmetry properties. - FNClarivate Analytics Web of Science
- VR1.0
- PTJ
- AUKipczak, L
Zawadzka, N
Jana, D
Antoniazzi, I
Grzeszczyk, M
Zinkiewicz, M
Watanabe, K
Taniguchi, T
Potemski, M
Faugeras, C
Babinski, A
Molas, MR
- AFLucja Kipczak
Natalia Zawadzka
Dipankar Jana
Igor Antoniazzi
Magdalena Grzeszczyk
Malgorzata Zinkiewicz
Kenji Watanabe
Takashi Taniguchi
Marek Potemski
Clement Faugeras
Adam Babinski
Maciej R Molas
- TIImpact of temperature on the brightening of neutral and charged dark excitons in WSe2 monolayer
- SONANOPHOTONICS
- LAEnglish
- DTArticle
- DEDark Excitons; Temperature Influence; Brightening
- ABOptically dark states play an important role in the electronic and optical properties of monolayers (MLs) of semiconducting transition metal dichalcogenides. The effect of temperature on the in-plane-field activation of the neutral and charged dark excitons is investigated in a WSe2 ML encapsulated in hexagonal BN flakes. The brightening rates of the neutral dark (XD) and grey (XG) excitons and the negative dark trion (TD) differ substantially at particular temperature. More importantly, they weaken considerably by about 3-4 orders of magnitude with temperature increased from 4.2 K to 100 K. The quenching of the dark-related emissions is accompanied by the two-order-of-magnitude increase in the emissions of their neutral bright counterparts, i.e. neutral bright exciton (XB) and spin-singlet (TS) and spin-triplet (TT) negative trions, due to the thermal activations of dark states. Furthermore, the energy splittings between the dark XD and TD complexes and the corresponding bright XB, TS, and TT ones vary with temperature rises from 4.2 K to 100 K. This is explained in terms of the different exciton-phonon coupling for the bright and dark excitons stemming from their distinct symmetry properties.
- C3University of Warsaw; Communaute Universite Grenoble Alpes; Universite Grenoble Alpes (UGA); Institute for Functional Intelligent Materials (I-FIM); National University of Singapore; National Institute for Materials Science; National Institute for Materials Science; Warsaw University of Technology
- RPKipczak, L (corresponding author), Univ Warsaw, Inst Expt Phys, Fac Phys, PL-02093 Warsaw, Poland
- FXWe are grateful to Artur Slobodeniuk for fruitful discussions.
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- PUWALTER DE GRUYTER GMBH
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- SCScience & Technology - Other Topics; Materials Science; Optics; Physics
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Guo, Shasha; Zhou, Xiuxian; Lee, Jinn-kye; Guo, Qing; Liu, Xiao; Wu, Yao; Ma, Mingyu; Zhang, Zhengyang; Liu, Zheng Nanoscale Identification of Local Strain Effect on TMD Catalysis JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2024, DOI: 10.1021/jacs.4c11190. Abstract | BibTeX | Endnote @article{ISI:001351705600001,
title = {Nanoscale Identification of Local Strain Effect on TMD Catalysis},
author = {Shasha Guo and Xiuxian Zhou and Jinn-kye Lee and Qing Guo and Xiao Liu and Yao Wu and Mingyu Ma and Zhengyang Zhang and Zheng Liu},
doi = {10.1021/jacs.4c11190},
times_cited = {0},
issn = {0002-7863},
year = {2024},
date = {2024-11-08},
journal = {JOURNAL OF THE AMERICAN CHEMICAL SOCIETY},
publisher = {AMER CHEMICAL SOC},
address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA},
abstract = {Strain engineering plays a crucial role in activating the basal plane of the TMD catalysts. However, experimental evidence linking strain strength to activity and distinguishing effects of compressive and tensile strain remains elusive due to the absence of high-resolution in situ correlation techniques. Here, we utilize nanobubble imaging by on-chip total-internal reflection microscopy to visualize active sites on the basal plane of strained MoS2 during hydrogen evolution reaction and atomic force microscopy to correlatively capture the nanoscale morphology and strain maps. By integrating the activity, morphology, and strain maps into comprehensive statistical analyses, we elucidate the strain effect on local activity at both multiprotrusion and (sub)single-protrusion levels. Our findings demonstrate that strain effectively activates sulfur vacancies on the basal plane, with tensile strain significantly enhancing local activity compared to compressive strain. Furthermore, we observe a time-dependent propagation of activity from high-activity to low-activity regions within single protrusions. This work clarifies the interplay between structural morphology and catalytic activity and provides new guidelines for the rational design of optimal TMD catalysts.},
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Strain engineering plays a crucial role in activating the basal plane of the TMD catalysts. However, experimental evidence linking strain strength to activity and distinguishing effects of compressive and tensile strain remains elusive due to the absence of high-resolution in situ correlation techniques. Here, we utilize nanobubble imaging by on-chip total-internal reflection microscopy to visualize active sites on the basal plane of strained MoS2 during hydrogen evolution reaction and atomic force microscopy to correlatively capture the nanoscale morphology and strain maps. By integrating the activity, morphology, and strain maps into comprehensive statistical analyses, we elucidate the strain effect on local activity at both multiprotrusion and (sub)single-protrusion levels. Our findings demonstrate that strain effectively activates sulfur vacancies on the basal plane, with tensile strain significantly enhancing local activity compared to compressive strain. Furthermore, we observe a time-dependent propagation of activity from high-activity to low-activity regions within single protrusions. This work clarifies the interplay between structural morphology and catalytic activity and provides new guidelines for the rational design of optimal TMD catalysts. - FNClarivate Analytics Web of Science
- VR1.0
- PTJ
- AUGuo, SS
Zhou, XX
Lee, JK
Guo, Q
Liu, X
Wu, Y
Ma, MY
Zhang, ZY
Liu, Z
- AFShasha Guo
Xiuxian Zhou
Jinn-kye Lee
Qing Guo
Xiao Liu
Yao Wu
Mingyu Ma
Zhengyang Zhang
Zheng Liu
- TINanoscale Identification of Local Strain Effect on TMD Catalysis
- SOJOURNAL OF THE AMERICAN CHEMICAL SOCIETY
- LAEnglish
- DTArticle
- IDMOS2
- ABStrain engineering plays a crucial role in activating the basal plane of the TMD catalysts. However, experimental evidence linking strain strength to activity and distinguishing effects of compressive and tensile strain remains elusive due to the absence of high-resolution in situ correlation techniques. Here, we utilize nanobubble imaging by on-chip total-internal reflection microscopy to visualize active sites on the basal plane of strained MoS2 during hydrogen evolution reaction and atomic force microscopy to correlatively capture the nanoscale morphology and strain maps. By integrating the activity, morphology, and strain maps into comprehensive statistical analyses, we elucidate the strain effect on local activity at both multiprotrusion and (sub)single-protrusion levels. Our findings demonstrate that strain effectively activates sulfur vacancies on the basal plane, with tensile strain significantly enhancing local activity compared to compressive strain. Furthermore, we observe a time-dependent propagation of activity from high-activity to low-activity regions within single protrusions. This work clarifies the interplay between structural morphology and catalytic activity and provides new guidelines for the rational design of optimal TMD catalysts.
- C1[Guo, Shasha] Cornell Univ, Dept Chem & Chem Biol, Ithaca, NY 14853 USA.
[Zhou, Xiuxian; Liu, Xiao; Wu, Yao; Ma, Mingyu; Liu, Zheng] Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore. [Lee, Jinn-kye; Ma, Mingyu; Zhang, Zhengyang] Nanyang Technol Univ, Sch Chem Chem Engn & Biotechnol, Singapore 637371, Singapore. [Guo, Qing] ASTAR, Inst High Performance Comp IHPC, Singapore 138632, Singapore. [Guo, Qing] ASTAR, Ctr Frontier AI Res CFAR, Singapore 138632, Singapore. [Liu, Zheng] Nanyang Technol Univ, CNRS, CINTRA, THALES,UMI 3288, Res Techno Plaza, Singapore 639798, Singapore - C3Cornell University; Nanyang Technological University; Nanyang Technological University; Agency for Science Technology & Research (A*STAR); A*STAR - Institute of High Performance Computing (IHPC); Agency for Science Technology & Research (A*STAR); Nanyang Technological University
- RPLiu, Z (corresponding author), Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore; Zhang, ZY (corresponding author), Nanyang Technol Univ, Sch Chem Chem Engn & Biotechnol, Singapore 637371, Singapore; Liu, Z (corresponding author), Nanyang Technol Univ, CNRS, CINTRA, THALES,UMI 3288, Res Techno Plaza, Singapore 639798, Singapore
- FUAgency for Science, Technology and Research [AcRF Tier 1 RG60/21, RG1/23]; Ministry of Education, Singapore [EDUNC-33-18-279-V12]; Institute for Functional Intelligent Materials [DTC-RGC-04]; National Research Foundation, Singapore [A2084c0065]; Infocomm Media Development Authority under its Trust Tech Funding Initiative [M21K2c0110]; Singapore Agency for Science, Technology, and Research (A*STAR) AME YIRG grant; MTC IRG grant
- FXZ.L. acknowledges funding from the Ministry of Education, Singapore (MOE-MOET2EP10121-0006), and its Research Centre of Excellence award to the Institute for Functional Intelligent Materials (Project EDUNC-33-18-279-V12). Q.G. thanks the support from the National Research Foundation, Singapore, and Infocomm Media Development Authority under its Trust Tech Funding Initiative (DTC-RGC-04). Z.Z. acknowledges the support from the Ministry of Education, Singapore (AcRF Tier 1 RG60/21, RG1/23), and the Singapore Agency for Science, Technology, and Research (A*STAR) AME YIRG grant (A2084c0065) and MTC IRG grant (M21K2c0110).
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- Z90
- U10
- U20
- PUAMER CHEMICAL SOC
- PIWASHINGTON
- PA1155 16TH ST, NW, WASHINGTON, DC 20036 USA
- SN0002-7863
- J9J AM CHEM SOC
- JIJ. Am. Chem. Soc.
- PDNOV 8
- PY2024
- DI10.1021/jacs.4c11190
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- SCChemistry
- GAL6H4G
- UTWOS:001351705600001
- ER
- EF
|
Yang, Kou; Nikolaev, Konstantin G; Li, Xiaolai; Erofeev, Ivan; Mirsaidov, Utkur M; Kravets, Vasyl G; Grigorenko, Alexander N; Qiu, Xueqing; Zhang, Shanqing; Novoselov, Kostya S; Andreeva, Daria V 2D Electrodes From Functionalized Graphene for Rapid Electrochemical Gold Extraction and Reduction From Electronic Waste ADVANCED SCIENCE, 2024, DOI: 10.1002/advs.202408533. Abstract | BibTeX | Endnote @article{ISI:001354285900001,
title = {2D Electrodes From Functionalized Graphene for Rapid Electrochemical Gold Extraction and Reduction From Electronic Waste},
author = {Kou Yang and Konstantin G Nikolaev and Xiaolai Li and Ivan Erofeev and Utkur M Mirsaidov and Vasyl G Kravets and Alexander N Grigorenko and Xueqing Qiu and Shanqing Zhang and Kostya S Novoselov and Daria V Andreeva},
doi = {10.1002/advs.202408533},
times_cited = {0},
year = {2024},
date = {2024-11-06},
journal = {ADVANCED SCIENCE},
publisher = {WILEY},
address = {111 RIVER ST, HOBOKEN 07030-5774, NJ USA},
abstract = {Electronic waste (e-waste) contains substantial quantities of valuable precious metals, particularly gold (Au). However, inefficient metal recovery leads to these precious metals being discarded in landfills, causing significant water and environmental contamination. This study introduces a two-dimensional (2D) electrode with a layered graphene oxide membrane functionalized by chitosan (GO/CS). The GO/CS membrane acts as an ion-selective layer and demonstrates capabilities in the electrochemical extraction and reduction of Au ions. The multiple functional groups of GO and CS offer high cooperativity in ion extraction and reduction, achieving 95 wt.% extraction efficiency within 10 min. The simultaneous extraction and electrocatalytic reduction of Au ions within the membrane leads to the formation of ready-to-use metallic Au forms such as chips and sensors. Such an approach eliminates the processing steps required to convert extracted gold into functional products, reducing time, cost, and energy. This direct formation of usable Au components enhances the efficiency of the recovery process, making it economically viable and environmentally sustainable. The gold mining market is projected to be valued at $270 billion by 2032, with the recycling segment reaching $10.8 billion, highlighting the substantial benefits and economic potential of efficient e-waste recycling technologies.},
keywords = {},
pubstate = {published},
tppubtype = {article}
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Electronic waste (e-waste) contains substantial quantities of valuable precious metals, particularly gold (Au). However, inefficient metal recovery leads to these precious metals being discarded in landfills, causing significant water and environmental contamination. This study introduces a two-dimensional (2D) electrode with a layered graphene oxide membrane functionalized by chitosan (GO/CS). The GO/CS membrane acts as an ion-selective layer and demonstrates capabilities in the electrochemical extraction and reduction of Au ions. The multiple functional groups of GO and CS offer high cooperativity in ion extraction and reduction, achieving 95 wt.% extraction efficiency within 10 min. The simultaneous extraction and electrocatalytic reduction of Au ions within the membrane leads to the formation of ready-to-use metallic Au forms such as chips and sensors. Such an approach eliminates the processing steps required to convert extracted gold into functional products, reducing time, cost, and energy. This direct formation of usable Au components enhances the efficiency of the recovery process, making it economically viable and environmentally sustainable. The gold mining market is projected to be valued at $270 billion by 2032, with the recycling segment reaching $10.8 billion, highlighting the substantial benefits and economic potential of efficient e-waste recycling technologies. - FNClarivate Analytics Web of Science
- VR1.0
- PTJ
- AUYang, K
Nikolaev, KG
Li, XL
Erofeev, I
Mirsaidov, UM
Kravets, VG
Grigorenko, AN
Qiu, XQ
Zhang, SQ
Novoselov, KS
Andreeva, DV
- AFKou Yang
Konstantin G Nikolaev
Xiaolai Li
Ivan Erofeev
Utkur M Mirsaidov
Vasyl G Kravets
Alexander N Grigorenko
Xueqing Qiu
Shanqing Zhang
Kostya S Novoselov
Daria V Andreeva
- TI2D Electrodes From Functionalized Graphene for Rapid Electrochemical Gold Extraction and Reduction From Electronic Waste
- SOADVANCED SCIENCE
- LAEnglish
- DTArticle
- DEChemisorption; Chitosan; Electrochemical Reduction; Electronic Waste; Gold Extraction; Graphene Oxide; Membrane
- IDSELECTIVE RECOVERY; AQUEOUS-SOLUTIONS; HIGHLY EFFICIENT; ADSORPTION; IONS; ADSORBENTS; SEPARATION; MEMBRANE; FILTER
- ABElectronic waste (e-waste) contains substantial quantities of valuable precious metals, particularly gold (Au). However, inefficient metal recovery leads to these precious metals being discarded in landfills, causing significant water and environmental contamination. This study introduces a two-dimensional (2D) electrode with a layered graphene oxide membrane functionalized by chitosan (GO/CS). The GO/CS membrane acts as an ion-selective layer and demonstrates capabilities in the electrochemical extraction and reduction of Au ions. The multiple functional groups of GO and CS offer high cooperativity in ion extraction and reduction, achieving 95 wt.% extraction efficiency within 10 min. The simultaneous extraction and electrocatalytic reduction of Au ions within the membrane leads to the formation of ready-to-use metallic Au forms such as chips and sensors. Such an approach eliminates the processing steps required to convert extracted gold into functional products, reducing time, cost, and energy. This direct formation of usable Au components enhances the efficiency of the recovery process, making it economically viable and environmentally sustainable. The gold mining market is projected to be valued at $270 billion by 2032, with the recycling segment reaching $10.8 billion, highlighting the substantial benefits and economic potential of efficient e-waste recycling technologies.
- C3Guangdong University of Technology; National University of Singapore; Institute for Functional Intelligent Materials (I-FIM); National University of Singapore; National University of Singapore; National University of Singapore; National University of Singapore; University of Manchester
- RPAndreeva, DV (corresponding author), Natl Univ Singapore, Inst Funct Intelligent Mat, Singapore 117544, Singapore; Andreeva, DV (corresponding author), Natl Univ Singapore, Dept Mat Sci & Engn, Singapore 117575, Singapore
- FXThis research was supported by the Ministry of Education, Singapore, under its Research Centre of Excellence award to the Institute for Functional Intelligent Materials (I-FIM, project no. EDUNC-33-18-279-V12).
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- PUWILEY
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- PA111 RIVER ST, HOBOKEN 07030-5774, NJ USA
- J9ADVANCED SCI
- JIAdv. Sci.
- PDNOV 6
- PY2024
- DI10.1002/advs.202408533
- PG8
- WCChemistry, Multidisciplinary; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
- SCChemistry; Science & Technology - Other Topics; Materials Science
- UTWOS:001354285900001
- ER
- EF
|
Liu, Xianglong; Li, Hao; Qi, Guobin; Qian, Yunyun; Li, Bowen; Shi, Leilei; Liu, Bin Combating Fungal Infections and Resistance with a Dual-Mechanism Luminogen to Disrupt Membrane Integrity and Induce DNA Damage JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2024, DOI: 10.1021/jacs.4c09916. Abstract | BibTeX | Endnote @article{ISI:001349082400001,
title = {Combating Fungal Infections and Resistance with a Dual-Mechanism Luminogen to Disrupt Membrane Integrity and Induce DNA Damage},
author = {Xianglong Liu and Hao Li and Guobin Qi and Yunyun Qian and Bowen Li and Leilei Shi and Bin Liu},
doi = {10.1021/jacs.4c09916},
times_cited = {0},
issn = {0002-7863},
year = {2024},
date = {2024-11-06},
journal = {JOURNAL OF THE AMERICAN CHEMICAL SOCIETY},
publisher = {AMER CHEMICAL SOC},
address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA},
abstract = {Antifungal drug resistance is a critical concern, demanding innovative therapeutic solutions. The dual-targeting mechanism of action (MoA), as an effective strategy to reduce drug resistance, has been validated in the design of antibacterial agents. However, the structural similarities between mammalian and fungal cells complicate the development of such a strategy for antifungal agents as the selectivity can be compromised. Herein, we introduce a dual-targeting strategy addressing fungal infections by selectively introducing DNA binding molecules into fungal nuclei. We incorporate rigid hydrophobic units into a DNA-binding domain to fabricate antifungal luminogens of TPY and TPZ, which exhibit enhanced membrane penetration and DNA-binding capabilities. These compounds exhibit dual-targeting MoA by depolarizing fungal membranes and inducing DNA damage, amplifying their potency against fungal pathogens with undetectable drug resistance. TPY and TPZ demonstrated robust antifungal activity in vitro and exhibited ideal therapeutic efficacy in a murine model of C. albicans-induced vaginitis. This multifaceted approach holds promise for overcoming drug resistance and advancing antifungal therapy.},
keywords = {},
pubstate = {published},
tppubtype = {article}
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Antifungal drug resistance is a critical concern, demanding innovative therapeutic solutions. The dual-targeting mechanism of action (MoA), as an effective strategy to reduce drug resistance, has been validated in the design of antibacterial agents. However, the structural similarities between mammalian and fungal cells complicate the development of such a strategy for antifungal agents as the selectivity can be compromised. Herein, we introduce a dual-targeting strategy addressing fungal infections by selectively introducing DNA binding molecules into fungal nuclei. We incorporate rigid hydrophobic units into a DNA-binding domain to fabricate antifungal luminogens of TPY and TPZ, which exhibit enhanced membrane penetration and DNA-binding capabilities. These compounds exhibit dual-targeting MoA by depolarizing fungal membranes and inducing DNA damage, amplifying their potency against fungal pathogens with undetectable drug resistance. TPY and TPZ demonstrated robust antifungal activity in vitro and exhibited ideal therapeutic efficacy in a murine model of C. albicans-induced vaginitis. This multifaceted approach holds promise for overcoming drug resistance and advancing antifungal therapy. - FNClarivate Analytics Web of Science
- VR1.0
- PTJ
- AULiu, XL
Li, H
Qi, GB
Qian, YY
Li, BW
Shi, LL
Liu, B
- AFXianglong Liu
Hao Li
Guobin Qi
Yunyun Qian
Bowen Li
Leilei Shi
Bin Liu
- TICombating Fungal Infections and Resistance with a Dual-Mechanism Luminogen to Disrupt Membrane Integrity and Induce DNA Damage
- SOJOURNAL OF THE AMERICAN CHEMICAL SOCIETY
- LAEnglish
- DTArticle
- IDIN-VITRO ACTIVITY; ANTIFUNGAL; INHIBITOR; THREAT; DRUG
- ABAntifungal drug resistance is a critical concern, demanding innovative therapeutic solutions. The dual-targeting mechanism of action (MoA), as an effective strategy to reduce drug resistance, has been validated in the design of antibacterial agents. However, the structural similarities between mammalian and fungal cells complicate the development of such a strategy for antifungal agents as the selectivity can be compromised. Herein, we introduce a dual-targeting strategy addressing fungal infections by selectively introducing DNA binding molecules into fungal nuclei. We incorporate rigid hydrophobic units into a DNA-binding domain to fabricate antifungal luminogens of TPY and TPZ, which exhibit enhanced membrane penetration and DNA-binding capabilities. These compounds exhibit dual-targeting MoA by depolarizing fungal membranes and inducing DNA damage, amplifying their potency against fungal pathogens with undetectable drug resistance. TPY and TPZ demonstrated robust antifungal activity in vitro and exhibited ideal therapeutic efficacy in a murine model of C. albicans-induced vaginitis. This multifaceted approach holds promise for overcoming drug resistance and advancing antifungal therapy.
- C1[Liu, Xianglong; Qi, Guobin; Li, Bowen; Liu, Bin] Natl Univ Singapore, Dept Chem & Biomol Engn, Singapore 117585, Singapore.
[Liu, Xianglong; Liu, Bin] Natl Univ Singapore, Joint Sch, Int Campus, Fuzhou 350207, Peoples R China. [Liu, Xianglong; Liu, Bin] Tianjin Univ, Int Campus, Fuzhou 350207, Peoples R China. [Li, Hao; Qian, Yunyun] Xiamen Univ, Xiangan Hosp, Sch Med, Dept Organ Transplantat, Xiamen 361005, Fujian, Peoples R China. [Qi, Guobin] Chinese Acad Sci, Inst Proc Engn, State Key Lab Biochem Engn, Key Lab Biopharmaceut Preparat & Delivery, Beijing 100190, Peoples R China. [Shi, Leilei] Shanghai Jiao Tong Univ, Shanghai Gen Hosp, Precis Res Ctr Refractory Dis, Sch Med, Shanghai 200025, Peoples R China. [Liu, Bin] Natl Univ Singapore Singapore, Inst Funct Intelligent Mat, Singapore 117544, Singapore - C3National University of Singapore; National University of Singapore; Tianjin University; Xiamen University; Chinese Academy of Sciences; Institute of Process Engineering, CAS; Shanghai Jiao Tong University; Institute for Functional Intelligent Materials (I-FIM); National University of Singapore
- RPLiu, B (corresponding author), Natl Univ Singapore, Dept Chem & Biomol Engn, Singapore 117585, Singapore; Liu, B (corresponding author), Natl Univ Singapore, Joint Sch, Int Campus, Fuzhou 350207, Peoples R China; Liu, B (corresponding author), Tianjin Univ, Int Campus, Fuzhou 350207, Peoples R China; Shi, LL (corresponding author), Shanghai Jiao Tong Univ, Shanghai Gen Hosp, Precis Res Ctr Refractory Dis, Sch Med, Shanghai 200025, Peoples R China; Liu, B (corresponding author), Natl Univ Singapore Singapore, Inst Funct Intelligent Mat, Singapore 117544, Singapore
- FUNational University of Singapore [A-0001423-06-00]; National University of Singapore [A-0009163-01-00, E-467-00-0012-02]; Singapore National Research Foundation [22105229]; National Natural Science Foundation of China
- FXThis study is supported by the National University of Singapore (A-0001423-06-00), the Singapore National Research Foundation (A-0009163-01-00; E-467-00-0012-02), and the National Natural Science Foundation of China (22105229).
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- TC0
- Z90
- U11
- U21
- PUAMER CHEMICAL SOC
- PIWASHINGTON
- PA1155 16TH ST, NW, WASHINGTON, DC 20036 USA
- SN0002-7863
- J9J AM CHEM SOC
- JIJ. Am. Chem. Soc.
- PDNOV 6
- PY2024
- DI10.1021/jacs.4c09916
- PG9
- WCChemistry, Multidisciplinary
- SCChemistry
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Tan, Jin Da; Low, Andre K Y; Ying, Shannon Thoi Rui; Tan, Sze Yu; Zhao, Wenguang; Lim, Yee-Fun; Li, Qianxiao; Khan, Saif A; Ramalingam, Balamurugan; Hippalgaonkar, Kedar Multi-objective synthesis optimization and kinetics of a sustainable terpolymer DIGITAL DISCOVERY, 2024, DOI: 10.1039/d4dd00233d. Abstract | BibTeX | Endnote @article{ISI:001349870400001,
title = {Multi-objective synthesis optimization and kinetics of a sustainable terpolymer},
author = {Jin Da Tan and Andre K Y Low and Shannon Thoi Rui Ying and Sze Yu Tan and Wenguang Zhao and Yee-Fun Lim and Qianxiao Li and Saif A Khan and Balamurugan Ramalingam and Kedar Hippalgaonkar},
doi = {10.1039/d4dd00233d},
times_cited = {0},
year = {2024},
date = {2024-11-04},
journal = {DIGITAL DISCOVERY},
publisher = {ROYAL SOC CHEMISTRY},
address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND},
abstract = {The properties of polymers are primarily influenced by their monomer constituents, functional groups, and their mode of linkages. Copolymers, synthesized from multiple monomers, offer unique material properties compared to their homopolymers. Optimizing the synthesis of terpolymers is a complex and labor-intensive task due to variations in monomer reactivity and their compositional shifts throughout the polymerization process. The present work focuses on synthesizing a new terpolymer from styrene, myrcene, and dibutyl itaconate (DBI) monomers with the goal of achieving a high glass transition temperature (Tg) in the resulting terpolymer. While the copolymerization of pairwise combinations of styrene, myrcene, and DBI have been previously investigated, the terpolymerization of all three at once remains unexplored. Terpolymers with monomers like styrene would provide high glass transition temperatures as the resultant polymers exhibit a rigid glassy state at ambient temperatures. Conversely, minimizing styrene incorporation also reduces reliance on petrochemical-derived monomer sources for terpolymer synthesis, thus enhancing the sustainability of terpolymer usage. To balance the objectives of maximizing Tg while minimizing styrene incorporation, we employ multi-objective Bayesian optimization to efficiently sample in a design space comprising 5 experimental parameters. We perform two iterations of optimization for a total of 89 terpolymers, reporting terpolymers with a Tg above ambient temperature while retaining less than 50% styrene incorporation. This underscores the potential for exploring and utilizing renewable monomers such as myrcene and DBI, to foster sustainability in polymer synthesis. Additionally, the dataset enables the calculation of ternary reactivity ratios using a system of ordinary differential equations based on the terminal model, providing valuable insights into the reactivity of monomers in complex ternary systems compared to binary copolymer systems. This approach reveals the nuanced kinetics of terpolymerization, further informing the synthesis of polymers with desired properties.},
keywords = {},
pubstate = {published},
tppubtype = {article}
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The properties of polymers are primarily influenced by their monomer constituents, functional groups, and their mode of linkages. Copolymers, synthesized from multiple monomers, offer unique material properties compared to their homopolymers. Optimizing the synthesis of terpolymers is a complex and labor-intensive task due to variations in monomer reactivity and their compositional shifts throughout the polymerization process. The present work focuses on synthesizing a new terpolymer from styrene, myrcene, and dibutyl itaconate (DBI) monomers with the goal of achieving a high glass transition temperature (Tg) in the resulting terpolymer. While the copolymerization of pairwise combinations of styrene, myrcene, and DBI have been previously investigated, the terpolymerization of all three at once remains unexplored. Terpolymers with monomers like styrene would provide high glass transition temperatures as the resultant polymers exhibit a rigid glassy state at ambient temperatures. Conversely, minimizing styrene incorporation also reduces reliance on petrochemical-derived monomer sources for terpolymer synthesis, thus enhancing the sustainability of terpolymer usage. To balance the objectives of maximizing Tg while minimizing styrene incorporation, we employ multi-objective Bayesian optimization to efficiently sample in a design space comprising 5 experimental parameters. We perform two iterations of optimization for a total of 89 terpolymers, reporting terpolymers with a Tg above ambient temperature while retaining less than 50% styrene incorporation. This underscores the potential for exploring and utilizing renewable monomers such as myrcene and DBI, to foster sustainability in polymer synthesis. Additionally, the dataset enables the calculation of ternary reactivity ratios using a system of ordinary differential equations based on the terminal model, providing valuable insights into the reactivity of monomers in complex ternary systems compared to binary copolymer systems. This approach reveals the nuanced kinetics of terpolymerization, further informing the synthesis of polymers with desired properties. - FNClarivate Analytics Web of Science
- VR1.0
- PTJ
- AUDa Tan, J
Low, AKY
Ying, STR
Tan, SY
Zhao, WG
Lim, YF
Li, QX
Khan, SA
Ramalingam, B
Hippalgaonkar, K
- AFJin Da Tan
Andre K Y Low
Shannon Thoi Rui Ying
Sze Yu Tan
Wenguang Zhao
Yee-Fun Lim
Qianxiao Li
Saif A Khan
Balamurugan Ramalingam
Kedar Hippalgaonkar
- TIMulti-objective synthesis optimization and kinetics of a sustainable terpolymer
- SODIGITAL DISCOVERY
- LAEnglish
- DTArticle
- IDCOPOLYMERS; POLYMERS; POLYMERIZATION; MYRCENE; STYRENE; BLOCK
- ABThe properties of polymers are primarily influenced by their monomer constituents, functional groups, and their mode of linkages. Copolymers, synthesized from multiple monomers, offer unique material properties compared to their homopolymers. Optimizing the synthesis of terpolymers is a complex and labor-intensive task due to variations in monomer reactivity and their compositional shifts throughout the polymerization process. The present work focuses on synthesizing a new terpolymer from styrene, myrcene, and dibutyl itaconate (DBI) monomers with the goal of achieving a high glass transition temperature (Tg) in the resulting terpolymer. While the copolymerization of pairwise combinations of styrene, myrcene, and DBI have been previously investigated, the terpolymerization of all three at once remains unexplored. Terpolymers with monomers like styrene would provide high glass transition temperatures as the resultant polymers exhibit a rigid glassy state at ambient temperatures. Conversely, minimizing styrene incorporation also reduces reliance on petrochemical-derived monomer sources for terpolymer synthesis, thus enhancing the sustainability of terpolymer usage. To balance the objectives of maximizing Tg while minimizing styrene incorporation, we employ multi-objective Bayesian optimization to efficiently sample in a design space comprising 5 experimental parameters. We perform two iterations of optimization for a total of 89 terpolymers, reporting terpolymers with a Tg above ambient temperature while retaining less than 50% styrene incorporation. This underscores the potential for exploring and utilizing renewable monomers such as myrcene and DBI, to foster sustainability in polymer synthesis. Additionally, the dataset enables the calculation of ternary reactivity ratios using a system of ordinary differential equations based on the terminal model, providing valuable insights into the reactivity of monomers in complex ternary systems compared to binary copolymer systems. This approach reveals the nuanced kinetics of terpolymerization, further informing the synthesis of polymers with desired properties.
- C1[Da Tan, Jin; Low, Andre K. Y.; Tan, Sze Yu; Lim, Yee-Fun; Ramalingam, Balamurugan; Hippalgaonkar, Kedar] ASTAR, Inst Mat Res & Engn IMRE, 2 Fusionopolis Way,Innovis 08-03, Singapore 138634, Singapore.
[Da Tan, Jin; Khan, Saif A.] Natl Univ Singapore, Grad Sch, Integrat Sci & Engn Programme, 21 Lower Kent Ridge Rd, Singapore 119077, Singapore. [Low, Andre K. Y.; Hippalgaonkar, Kedar] Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore. [Ying, Shannon Thoi Rui; Zhao, Wenguang; Lim, Yee-Fun; Ramalingam, Balamurugan] ASTAR, Inst Sustainabil Chem Energy & Environm ISCE2, 1 Pesek Rd, Singapore 627833, Singapore. [Li, Qianxiao; Hippalgaonkar, Kedar] Natl Univ Singapore, Inst Funct Intelligent Mat, 4 Sci Dr 2, Singapore 117544, Singapore. [Li, Qianxiao] Natl Univ Singapore, Dept Math, Singapore 119076, Singapore. [Khan, Saif A.] Natl Univ Singapore, Dept Chem & Biomol Engn, 4 Engn Dr 4, Singapore 117585, Singapore - C3Agency for Science Technology & Research (A*STAR); A*STAR - Institute of Materials Research & Engineering (IMRE); National University of Singapore; Nanyang Technological University; Agency for Science Technology & Research (A*STAR); Institute for Functional Intelligent Materials (I-FIM); National University of Singapore; National University of Singapore; National University of Singapore
- RPRamalingam, B (corresponding author), ASTAR, Inst Mat Res & Engn IMRE, 2 Fusionopolis Way,Innovis 08-03, Singapore 138634, Singapore; Hippalgaonkar, K (corresponding author), Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore; Ramalingam, B (corresponding author), ASTAR, Inst Sustainabil Chem Energy & Environm ISCE2, 1 Pesek Rd, Singapore 627833, Singapore; Hippalgaonkar, K (corresponding author), Natl Univ Singapore, Inst Funct Intelligent Mat, 4 Sci Dr 2, Singapore 117544, Singapore
- FUNational Research Foundation Singapore [M24N4b0034]; AME Programmatic Fund [NRF-CRP25-2020-0002]; National Research Foundation's Competitive Research Programme (NRF-CRP) in Singapore [C231218004]; Horizontal Technology Coordinating Office of A*STAR
- FXK. H. and B. R. acknowledge funding from the Materials Generative Design and Testing Framework (MAT-GDT) Program at A*STAR, provided through the AME Programmatic Fund (Grant No. M24N4b0034). K. H. acknowledges the National Research Foundation's Competitive Research Programme (NRF-CRP) in Singapore (Grant No. NRF-CRP25-2020-0002). BR thanks the Horizontal Technology Coordinating Office of A*STAR for seed funding under project No. C231218004.
- NR43
- TC0
- Z90
- U10
- U20
- PUROYAL SOC CHEMISTRY
- PICAMBRIDGE
- PATHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND
- J9DIGIT DISCOV
- JIDigit. Discov.
- PDNOV 4
- PY2024
- DI10.1039/d4dd00233d
- PG9
- WCChemistry, Multidisciplinary; Computer Science, Interdisciplinary Applications
- SCChemistry; Computer Science
- GAL3P3S
- UTWOS:001349870400001
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Ratwani, Chirag R; Donato, Katarzyna Z; Grebenchuk, Sergey; Mija, Alice; Novoselov, Kostya S; Abdelkader, Amr M Enhanced Self-Healing in Dual Network Entangled Hydrogels by Macromolecular Architecture and Alignent of Surface Functionalized hBN Nanosheets ADVANCED MATERIALS INTERFACES, 2024, DOI: 10.1002/admi.202400691. Abstract | BibTeX | Endnote @article{ISI:001357180100001,
title = {Enhanced Self-Healing in Dual Network Entangled Hydrogels by Macromolecular Architecture and Alignent of Surface Functionalized hBN Nanosheets},
author = {Chirag R Ratwani and Katarzyna Z Donato and Sergey Grebenchuk and Alice Mija and Kostya S Novoselov and Amr M Abdelkader},
doi = {10.1002/admi.202400691},
times_cited = {0},
issn = {2196-7350},
year = {2024},
date = {2024-10-31},
journal = {ADVANCED MATERIALS INTERFACES},
publisher = {WILEY},
address = {111 RIVER ST, HOBOKEN 07030-5774, NJ USA},
abstract = {Hydrogels have shown great promise as versatile biomaterials for various applications, ranging from tissue engineering to flexible electronics. Among their notable attributes, self-healing capabilities stand out as a significant advantage, facilitating autonomous repair of mechanical damage and restoration of structural integrity. In this work, a dual network macromolecular biphasic composite is designed using an anisotropic structure which facilitates unidirectional chain diffusion and imparts superior self-healing and mechanical properties. The resulting nanocomposite demonstrates significantly higher self-healing efficiency (92%) compared to traditional polyvinyl alcohol (PVA) hydrogels, while also improving the tensile strength and elastic modulus, which typically compete with each other in soft materials. This improvement is attributed to enhanced barrier properties within the matrix due to the alignment of surface-functionalized 2D hBN nanosheets along the biopolymer scaffold. The insights gained from this research can be leveraged to develop advanced self-healing materials by using 2D nanofillers as "safety barriers" to define the movement of polymeric chains.},
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pubstate = {published},
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Hydrogels have shown great promise as versatile biomaterials for various applications, ranging from tissue engineering to flexible electronics. Among their notable attributes, self-healing capabilities stand out as a significant advantage, facilitating autonomous repair of mechanical damage and restoration of structural integrity. In this work, a dual network macromolecular biphasic composite is designed using an anisotropic structure which facilitates unidirectional chain diffusion and imparts superior self-healing and mechanical properties. The resulting nanocomposite demonstrates significantly higher self-healing efficiency (92%) compared to traditional polyvinyl alcohol (PVA) hydrogels, while also improving the tensile strength and elastic modulus, which typically compete with each other in soft materials. This improvement is attributed to enhanced barrier properties within the matrix due to the alignment of surface-functionalized 2D hBN nanosheets along the biopolymer scaffold. The insights gained from this research can be leveraged to develop advanced self-healing materials by using 2D nanofillers as "safety barriers" to define the movement of polymeric chains. - FNClarivate Analytics Web of Science
- VR1.0
- PTJ
- AURatwani, CR
Donato, KZ
Grebenchuk, S
Mija, A
Novoselov, KS
Abdelkader, AM
- AFChirag R Ratwani
Katarzyna Z Donato
Sergey Grebenchuk
Alice Mija
Kostya S Novoselov
Amr M Abdelkader
- TIEnhanced Self-Healing in Dual Network Entangled Hydrogels by Macromolecular Architecture and Alignent of Surface Functionalized hBN Nanosheets
- SOADVANCED MATERIALS INTERFACES
- LAEnglish
- DTArticle
- DEAnisotropic Hydrogels; Directional Freezing; Hexagonal Boron Nitride; Self-healing; Surface Functionalization
- IDEXFOLIATION; NANOPARTICLES
- ABHydrogels have shown great promise as versatile biomaterials for various applications, ranging from tissue engineering to flexible electronics. Among their notable attributes, self-healing capabilities stand out as a significant advantage, facilitating autonomous repair of mechanical damage and restoration of structural integrity. In this work, a dual network macromolecular biphasic composite is designed using an anisotropic structure which facilitates unidirectional chain diffusion and imparts superior self-healing and mechanical properties. The resulting nanocomposite demonstrates significantly higher self-healing efficiency (92%) compared to traditional polyvinyl alcohol (PVA) hydrogels, while also improving the tensile strength and elastic modulus, which typically compete with each other in soft materials. This improvement is attributed to enhanced barrier properties within the matrix due to the alignment of surface-functionalized 2D hBN nanosheets along the biopolymer scaffold. The insights gained from this research can be leveraged to develop advanced self-healing materials by using 2D nanofillers as "safety barriers" to define the movement of polymeric chains.
- C1[Ratwani, Chirag R.; Abdelkader, Amr M.] Bournemouth Univ, Fac Sci & Technol, Dept Design & Engn, Poole BH12 5BB, Dorset, England.
[Donato, Katarzyna Z.] Natl Univ Singapore, Ctr Adv 2D Mat, Singapore 117546, Singapore. [Donato, Katarzyna Z.] Charles Univ Prague, Fac Sci, Dept Inorgan Chem, Hlavova 2030-8, Prague 12800, Czech Republic. [Grebenchuk, Sergey] Natl Univ Singapore, Dept Mat Sci & Engn, Singapore 117575, Singapore. [Grebenchuk, Sergey; Novoselov, Kostya S.] Natl Univ Singapore, Inst Funct Intelligent Mat, Singapore 117575, Singapore. [Mija, Alice; Abdelkader, Amr M.] Univ Cote Azur, Inst Chim Nice, UMR CNRS 7272, 28 Ave Valrose, F-06108 Nice, France - C3Bournemouth University; National University of Singapore; Charles University Prague; National University of Singapore; National University of Singapore; Institute for Functional Intelligent Materials (I-FIM); Universite Cote d'Azur
- RPRatwani, CR (corresponding author), Bournemouth Univ, Fac Sci & Technol, Dept Design & Engn, Poole BH12 5BB, Dorset, England; Abdelkader, AM (corresponding author), Univ Cote Azur, Inst Chim Nice, UMR CNRS 7272, 28 Ave Valrose, F-06108 Nice, France
- FUUCAJ.E.D.I. [ANR-15-IDEX-01]; French government, through the UCA J.E.D.I. Investments in the Future project [EDUNC-33-18-279-V12]; Ministry of Education, Singapore (Research Centre of Excellence award) [RSRPR190000]; Royal Society (UK)
- FXThis work has been supported by the French government, through the UCA J.E.D.I. Investments in the Future project managed by the National Research Agency (ANR) with the reference number ANR-15-IDEX-01. KSN acknowledges support from the Ministry of Education, Singapore (Research Centre of Excellence award to the Institute for Functional Intelligent Materials, I-FIM, project No. EDUNC-33-18-279-V12) and from the Royal Society (UK, grant number RSRPR190000).
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- U20
- PUWILEY
- PIHOBOKEN
- PA111 RIVER ST, HOBOKEN 07030-5774, NJ USA
- SN2196-7350
- J9ADV MATER INTERFACES
- JIAdv. Mater. Interfaces
- PDOCT 31
- PY2024
- DI10.1002/admi.202400691
- PG11
- WCChemistry, Multidisciplinary; Materials Science, Multidisciplinary
- SCChemistry; Materials Science
- UTWOS:001357180100001
- ER
- EF
|
Kapuscinski, Piotr; Slobodeniuk, Artur O; Delhomme, Alex; Faugeras, Clement; Grzeszczyk, Magdalena; Nogajewski, Karol; Watanabe, Kenji; Taniguchi, Takashi; Potemski, Marek Rydberg series of intralayer K-excitons in WSe2 multilayers PHYSICAL REVIEW B, 110 (15), 2024, DOI: 10.1103/PhysRevB.110.155439. Abstract | BibTeX | Endnote @article{ISI:001350225300001,
title = {Rydberg series of intralayer K-excitons in WSe_{2} multilayers},
author = {Piotr Kapuscinski and Artur O Slobodeniuk and Alex Delhomme and Clement Faugeras and Magdalena Grzeszczyk and Karol Nogajewski and Kenji Watanabe and Takashi Taniguchi and Marek Potemski},
doi = {10.1103/PhysRevB.110.155439},
times_cited = {1},
issn = {2469-9950},
year = {2024},
date = {2024-10-30},
journal = {PHYSICAL REVIEW B},
volume = {110},
number = {15},
publisher = {AMER PHYSICAL SOC},
address = {ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA},
abstract = {Semiconducting transition metal dichalcogenides of group VI are well known for their prominent excitonic effects and the transition from an indirect to a direct band gap when reduced to monolayers. While considerable efforts have elucidated the Rydberg series of excitons in monolayers, understanding their properties in multilayers remains incomplete. In these structures, despite an indirect band gap, momentum-direct excitons largely shape the optical response. In this work, we combine magnetoreflectance experiments with theoretical modeling based on the kp approach to investigate the origin of excitonic resonances in WSe2 bi, tri, and quadlayers. For all investigated thicknesses, we observe a series of excitonic resonances in the reflectance spectra, initiated by a ground state with an amplitude comparable to the ground state of the 1s exciton in the monolayer. Higher-energy states exhibit a decrease in intensity with increasing energy, as expected for the excited states of the Rydberg series, although a significant increase in the diamagnetic shift is missing in tri and quadlayers. By comparing the experimental observations with theoretical predictions, we discover that the excitonic resonances observed in trilayers originate from two Rydberg series, while quadlayers exhibit four such series, and bilayers host a single Rydberg series similar to that found in monolayers.},
keywords = {},
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Semiconducting transition metal dichalcogenides of group VI are well known for their prominent excitonic effects and the transition from an indirect to a direct band gap when reduced to monolayers. While considerable efforts have elucidated the Rydberg series of excitons in monolayers, understanding their properties in multilayers remains incomplete. In these structures, despite an indirect band gap, momentum-direct excitons largely shape the optical response. In this work, we combine magnetoreflectance experiments with theoretical modeling based on the kp approach to investigate the origin of excitonic resonances in WSe2 bi, tri, and quadlayers. For all investigated thicknesses, we observe a series of excitonic resonances in the reflectance spectra, initiated by a ground state with an amplitude comparable to the ground state of the 1s exciton in the monolayer. Higher-energy states exhibit a decrease in intensity with increasing energy, as expected for the excited states of the Rydberg series, although a significant increase in the diamagnetic shift is missing in tri and quadlayers. By comparing the experimental observations with theoretical predictions, we discover that the excitonic resonances observed in trilayers originate from two Rydberg series, while quadlayers exhibit four such series, and bilayers host a single Rydberg series similar to that found in monolayers. - FNClarivate Analytics Web of Science
- VR1.0
- PTJ
- AUKapuscinski, P
Slobodeniuk, AO
Delhomme, A
Faugeras, C
Grzeszczyk, M
Nogajewski, K
Watanabe, K
Taniguchi, T
Potemski, M
- AFPiotr Kapuscinski
Artur O Slobodeniuk
Alex Delhomme
Clement Faugeras
Magdalena Grzeszczyk
Karol Nogajewski
Kenji Watanabe
Takashi Taniguchi
Marek Potemski
- TIRydberg series of intralayer K-excitons in WSe2 multilayers
- SOPHYSICAL REVIEW B
- LAEnglish
- DTArticle
- IDDARK EXCITONS; MONOLAYER; SEMICONDUCTOR; MOSE2
- ABSemiconducting transition metal dichalcogenides of group VI are well known for their prominent excitonic effects and the transition from an indirect to a direct band gap when reduced to monolayers. While considerable efforts have elucidated the Rydberg series of excitons in monolayers, understanding their properties in multilayers remains incomplete. In these structures, despite an indirect band gap, momentum-direct excitons largely shape the optical response. In this work, we combine magnetoreflectance experiments with theoretical modeling based on the kp approach to investigate the origin of excitonic resonances in WSe2 bi, tri, and quadlayers. For all investigated thicknesses, we observe a series of excitonic resonances in the reflectance spectra, initiated by a ground state with an amplitude comparable to the ground state of the 1s exciton in the monolayer. Higher-energy states exhibit a decrease in intensity with increasing energy, as expected for the excited states of the Rydberg series, although a significant increase in the diamagnetic shift is missing in tri and quadlayers. By comparing the experimental observations with theoretical predictions, we discover that the excitonic resonances observed in trilayers originate from two Rydberg series, while quadlayers exhibit four such series, and bilayers host a single Rydberg series similar to that found in monolayers.
- C1[Kapuscinski, Piotr; Delhomme, Alex; Faugeras, Clement; Potemski, Marek] Univ Toulouse 3, Univ Grenoble Alpes, Univ Toulouse,CNRS,UPR3228,INSA T, Lab Natl Champs Magnet Intenses,EMFL, Grenoble, France.
[Kapuscinski, Piotr; Delhomme, Alex; Faugeras, Clement; Potemski, Marek] Univ Toulouse 3, Univ Grenoble Alpes, Univ Toulouse,CNRS,UPR3228,INSA T, Lab Natl Champs Magnet Intenses,EMFL, Toulouse, France. [Kapuscinski, Piotr; Faugeras, Clement; Nogajewski, Karol; Potemski, Marek] Univ Warsaw, Inst Expt Phys, Fac Phys, Ul Pasteura 5, PL-02093 Warsaw, Poland. [Slobodeniuk, Artur O.] Charles Univ Prague, Fac Math & Phys, Dept Condensed Matter Phys, Ke Karlovu 5, CZ-12116 Prague, Czech Republic. [Delhomme, Alex] Tech Univ Munich, Walter Schottky Inst, Coulombwall 4, D-85748 Garching, Germany. [Delhomme, Alex] Tech Univ Munich, Sch Nat Sci, Coulombwall 4, D-85748 Garching, Germany. [Grzeszczyk, Magdalena] Natl Univ Singapore, Inst Funct Intelligent Mat, Singapore 117544, Singapore. [Watanabe, Kenji] Natl Inst Mat Sci, Res Ctr Elect & Opt Mat, 1-1 Namiki, Tsukuba 3050044, Japan. [Taniguchi, Takashi] Natl Inst Mat Sci, Res Ctr Mat Nanoarchitecton, 1-1 Namiki, Tsukuba 3050044, Japan. [Potemski, Marek] Warsaw Univ Technol, CENTERA Labs, CEZAMAT, PL-02822 Warsaw, Poland - C3Centre National de la Recherche Scientifique (CNRS); CNRS - Institute of Physics (INP); Universite de Toulouse; Universite Toulouse III - Paul Sabatier; Communaute Universite Grenoble Alpes; Universite Grenoble Alpes (UGA); Centre National de la Recherche Scientifique (CNRS); CNRS - Institute of Physics (INP); Universite de Toulouse; Universite Toulouse III - Paul Sabatier; Communaute Universite Grenoble Alpes; Universite Grenoble Alpes (UGA); University of Warsaw; Charles University Prague; Technical University of Munich; Technical University of Munich; Institute for Functional Intelligent Materials (I-FIM); National University of Singapore; National Institute for Materials Science; National Institute for Materials Science; Warsaw University of Technology
- RPKapuscinski, P (corresponding author), Univ Toulouse 3, Univ Grenoble Alpes, Univ Toulouse,CNRS,UPR3228,INSA T, Lab Natl Champs Magnet Intenses,EMFL, Grenoble, France; Kapuscinski, P (corresponding author), Univ Toulouse 3, Univ Grenoble Alpes, Univ Toulouse,CNRS,UPR3228,INSA T, Lab Natl Champs Magnet Intenses,EMFL, Toulouse, France; Kapuscinski, P (corresponding author), Univ Warsaw, Inst Expt Phys, Fac Phys, Ul Pasteura 5, PL-02093 Warsaw, Poland
- FUCzech Science Foundation [GACR 23-06369S]; JSPS KAKENHI [21H05233, 23H02052]; World Premier International Research Center Initiative (WPI), MEXT, Japan [FENG.02.01-IP.05-T004/23]; IRA program of the Foundation for Polish Science; EU FENG Programme
- FXThe authors are grateful to D. Vaclavkova and M. Bartos for their collaboration at the initial stage of the work and thank B. Pi y etka and M. Krol for fruitful discussions. The work was supported by the Czech Science Foundation (Project No. GACR 23-06369S) . K.W. and T.T. acknowledge support from the JSPS KAKENHI (Grants No. 21H05233 and No. 23H02052) and World Premier International Research Center Initiative (WPI), MEXT, Japan. M.P. acknowledges the support from the Centera2 project, FENG.02.01-IP.05-T004/23, funded within the IRA program of the Foundation for Polish Science, cofinanced by the EU FENG Programme.
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- TC1
- Z91
- U10
- U20
- PUAMER PHYSICAL SOC
- PICOLLEGE PK
- PAONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
- SN2469-9950
- J9PHYS REV B
- JIPhys. Rev. B
- PDOCT 30
- PY2024
- VL110
- DI10.1103/PhysRevB.110.155439
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Pramanik, Nikhil; Huang, Sunchao; Duan, Ruihuan; Zhai, Qingwei; Go, Michael; Boothroyd, Chris; Liu, Zheng; Wong, Liang Jie Fundamental scaling laws of water-window X-rays from free-electron-driven van der Waals structures NATURE PHOTONICS, 2024, DOI: 10.1038/s41566-024-01547-3. Abstract | BibTeX | Endnote @article{ISI:001345480500002,
title = {Fundamental scaling laws of water-window X-rays from free-electron-driven van der Waals structures},
author = {Nikhil Pramanik and Sunchao Huang and Ruihuan Duan and Qingwei Zhai and Michael Go and Chris Boothroyd and Zheng Liu and Liang Jie Wong},
doi = {10.1038/s41566-024-01547-3},
times_cited = {0},
issn = {1749-4885},
year = {2024},
date = {2024-10-28},
journal = {NATURE PHOTONICS},
publisher = {NATURE PORTFOLIO},
address = {HEIDELBERGER PLATZ 3, BERLIN, 14197, GERMANY},
abstract = {Water-window X-rays are crucial in medical and biological applications, enabling the natural-contrast imaging of biological cells without external staining. However, water-window X-ray sources with bespoke photon energies-needed in high-contrast imaging-remain challenging to obtain, except at large synchrotron facilities. Here we address this challenge by demonstrating tabletop, water-window X-ray generation from free-electron-driven van der Waals materials, enabling the continuous tuning of photon energies across the entire water-window regime. Additionally, we present a truly predictive theoretical framework combining first-principles electromagnetism with Monte Carlo simulations to accurately predict the photon flux and brightness in absolute quantities. We obtain fundamental scaling laws for the tunable photon flux, matching the experimental results and providing a way to design powerful emitters based on free-electron-driven quantum materials. We show that we can potentially achieve photon fluxes needed for imaging and spectroscopy applications (over 10(8) photons s(-1) on the sample-verified by our framework based on our experimentally achieved fluxes of about 10(3) photons s(-1) using similar to 50 nA current). Importantly, our theory highlights the critical role played by the large mean free paths and interlayer atomic spacings unique to van der Waals structures, showing the latter's advantages over other materials in generating water-window X-rays.},
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Water-window X-rays are crucial in medical and biological applications, enabling the natural-contrast imaging of biological cells without external staining. However, water-window X-ray sources with bespoke photon energies-needed in high-contrast imaging-remain challenging to obtain, except at large synchrotron facilities. Here we address this challenge by demonstrating tabletop, water-window X-ray generation from free-electron-driven van der Waals materials, enabling the continuous tuning of photon energies across the entire water-window regime. Additionally, we present a truly predictive theoretical framework combining first-principles electromagnetism with Monte Carlo simulations to accurately predict the photon flux and brightness in absolute quantities. We obtain fundamental scaling laws for the tunable photon flux, matching the experimental results and providing a way to design powerful emitters based on free-electron-driven quantum materials. We show that we can potentially achieve photon fluxes needed for imaging and spectroscopy applications (over 10(8) photons s(-1) on the sample-verified by our framework based on our experimentally achieved fluxes of about 10(3) photons s(-1) using similar to 50 nA current). Importantly, our theory highlights the critical role played by the large mean free paths and interlayer atomic spacings unique to van der Waals structures, showing the latter's advantages over other materials in generating water-window X-rays. - FNClarivate Analytics Web of Science
- VR1.0
- PTJ
- AUPramanik, N
Huang, SC
Duan, RH
Zhai, QW
Go, M
Boothroyd, C
Liu, Z
Wong, LJ
- AFNikhil Pramanik
Sunchao Huang
Ruihuan Duan
Qingwei Zhai
Michael Go
Chris Boothroyd
Zheng Liu
Liang Jie Wong
- TIFundamental scaling laws of water-window X-rays from free-electron-driven van der Waals structures
- SONATURE PHOTONICS
- LAEnglish
- DTArticle
- IDNONRELATIVISTIC ELECTRONS; COHERENT BREMSSTRAHLUNG; RELATIVISTIC ELECTRONS; FOIL THICKNESS; RADIATION; GRAPHENE; LASER; DISTRIBUTIONS; SPECTROSCOPY; MICROSCOPE
- ABWater-window X-rays are crucial in medical and biological applications, enabling the natural-contrast imaging of biological cells without external staining. However, water-window X-ray sources with bespoke photon energies-needed in high-contrast imaging-remain challenging to obtain, except at large synchrotron facilities. Here we address this challenge by demonstrating tabletop, water-window X-ray generation from free-electron-driven van der Waals materials, enabling the continuous tuning of photon energies across the entire water-window regime. Additionally, we present a truly predictive theoretical framework combining first-principles electromagnetism with Monte Carlo simulations to accurately predict the photon flux and brightness in absolute quantities. We obtain fundamental scaling laws for the tunable photon flux, matching the experimental results and providing a way to design powerful emitters based on free-electron-driven quantum materials. We show that we can potentially achieve photon fluxes needed for imaging and spectroscopy applications (over 10(8) photons s(-1) on the sample-verified by our framework based on our experimentally achieved fluxes of about 10(3) photons s(-1) using similar to 50 nA current). Importantly, our theory highlights the critical role played by the large mean free paths and interlayer atomic spacings unique to van der Waals structures, showing the latter's advantages over other materials in generating water-window X-rays.
- C1[Pramanik, Nikhil; Huang, Sunchao; Zhai, Qingwei; Go, Michael; Wong, Liang Jie] Nanyang Technol Univ, Sch Elect & Elect Engn, Singapore, Singapore.
[Duan, Ruihuan] Nanyang Technol Univ, CINTRA CNRS, NTU, THALES, Singapore, Singapore. [Duan, Ruihuan; Boothroyd, Chris; Liu, Zheng] Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore, Singapore. [Boothroyd, Chris] Nanyang Technol Univ, Facil Anal Characterisat Testing & Simulat FACTS, Singapore, Singapore. [Liu, Zheng] Natl Univ Singapore, Inst Funct Intelligent Mat, Singapore, Singapore - C3Nanyang Technological University; Nanyang Technological University; Nanyang Technological University; Nanyang Technological University; National University of Singapore; Institute for Functional Intelligent Materials (I-FIM)
- RPWong, LJ (corresponding author), Nanyang Technol Univ, Sch Elect & Elect Engn, Singapore, Singapore
- FUMinistry of Education - Singapore (MOE) [MOE-T2EP50222-0012]; Ministry of Education, Singapore, under its AcRF Tier 2 programme [MOE-MOET32023-0003]; A*STAR SERC MTC Programmatic Fund; Singapore Ministry of Education Tier 3 Programmatic Fund
- FXWe thank A. Lim, Y. Y. Tay, S. Morris and D. Ang for helpful discussions. This project is supported by the Ministry of Education, Singapore, under its AcRF Tier 2 programme (award no. MOE-T2EP50222-0012). We acknowledge the Facility for Analysis, Characterisation, Testing and Simulation, Nanyang Technological University, Singapore, for use of their electron microscopy/X-ray facilities. Z.L. and R.D. acknowledge the support of A*STAR SERC MTC Programmatic Fund (award no. M23M2b0056) and the Singapore Ministry of Education Tier 3 Programmatic Fund (award no. MOE-MOET32023-0003).
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- DI10.1038/s41566-024-01547-3
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Wang, Shixuan; Fu, Qiang; Zheng, Ting; Han, Xu; Wang, Hao; Zhou, Tao; Liu, Jing; Liu, Tianqi; Zhang, Yuwei; Chen, Kaiqi; Wang, Qixing; Duan, Zhexing; Zhou, Xin; Watanabe, Kenji; Taniguchi, Takashi; Yan, Jiaxu; Huang, Yuan; Xiong, Yuwei; Yang, Joel K W; Hu, Zhenliang; Xu, Tao; Sun, Litao; Hong, Jinhua; Zheng, Yujie; You, Yumeng; Zhang, Qi; Lu, Junpeng; Ni, Zhenhua Light-emitting diodes based on intercalated transition metal dichalcogenides with suppressed efficiency roll-off at high generation rates NATURE ELECTRONICS, 2024, DOI: 10.1038/s41928-024-01264-3. Abstract | BibTeX | Endnote @article{ISI:001344322000001,
title = {Light-emitting diodes based on intercalated transition metal dichalcogenides with suppressed efficiency roll-off at high generation rates},
author = {Shixuan Wang and Qiang Fu and Ting Zheng and Xu Han and Hao Wang and Tao Zhou and Jing Liu and Tianqi Liu and Yuwei Zhang and Kaiqi Chen and Qixing Wang and Zhexing Duan and Xin Zhou and Kenji Watanabe and Takashi Taniguchi and Jiaxu Yan and Yuan Huang and Yuwei Xiong and Joel K W Yang and Zhenliang Hu and Tao Xu and Litao Sun and Jinhua Hong and Yujie Zheng and Yumeng You and Qi Zhang and Junpeng Lu and Zhenhua Ni},
doi = {10.1038/s41928-024-01264-3},
times_cited = {0},
issn = {2520-1131},
year = {2024},
date = {2024-10-28},
journal = {NATURE ELECTRONICS},
publisher = {NATURE PORTFOLIO},
address = {HEIDELBERGER PLATZ 3, BERLIN, 14197, GERMANY},
abstract = {The capabilities of light-emitting diodes (LEDs) based on two-dimensional materials are restricted by efficiency roll-off, which is induced by exciton-exciton annihilation, at high current densities. Dielectric or strain engineering can be used to reduce exciton-exciton annihilation rates in monolayer transition metal dichalcogenides, but achieving electroluminescence in two-dimensional LEDs without efficiency roll-off is challenging. Here we describe pulsed LEDs that are based on intercalated transition metal dichalcogenides and offer suppressed exciton-exciton annihilation at high exciton generation rates. We intercalate oxygen plasma into few-layer molybdenum disulfide (MoS2) and tungsten disulfide (WS2) to create LEDs with a suppressed efficiency roll-off in both photo-excitation and electro-injection luminescence at all exciton densities up to around 1020 cm-2 s-1. We attribute this suppression to a reduced exciton Bohr radius and exciton diffusion coefficient, as extracted from optical spectroscopy measurements. LEDs based on intercalated MoS2 and WS2 operate at maximum external quantum efficiencies of 0.02% and 0.78%, respectively, at a generation rate of around 1020 cm-2 s-1.},
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The capabilities of light-emitting diodes (LEDs) based on two-dimensional materials are restricted by efficiency roll-off, which is induced by exciton-exciton annihilation, at high current densities. Dielectric or strain engineering can be used to reduce exciton-exciton annihilation rates in monolayer transition metal dichalcogenides, but achieving electroluminescence in two-dimensional LEDs without efficiency roll-off is challenging. Here we describe pulsed LEDs that are based on intercalated transition metal dichalcogenides and offer suppressed exciton-exciton annihilation at high exciton generation rates. We intercalate oxygen plasma into few-layer molybdenum disulfide (MoS2) and tungsten disulfide (WS2) to create LEDs with a suppressed efficiency roll-off in both photo-excitation and electro-injection luminescence at all exciton densities up to around 1020 cm-2 s-1. We attribute this suppression to a reduced exciton Bohr radius and exciton diffusion coefficient, as extracted from optical spectroscopy measurements. LEDs based on intercalated MoS2 and WS2 operate at maximum external quantum efficiencies of 0.02% and 0.78%, respectively, at a generation rate of around 1020 cm-2 s-1. - FNClarivate Analytics Web of Science
- VR1.0
- PTJ
- AUWang, SX
Fu, Q
Zheng, T
Han, X
Wang, H
Zhou, T
Liu, J
Liu, TQ
Zhang, YW
Chen, KQ
Wang, QX
Duan, ZX
Zhou, X
Watanabe, K
Taniguchi, T
Yan, JX
Huang, Y
Xiong, YW
Yang, JKW
Hu, ZL
Xu, T
Sun, LT
Hong, JH
Zheng, YJ
You, YM
Zhang, Q
Lu, JP
Ni, ZH
- AFShixuan Wang
Qiang Fu
Ting Zheng
Xu Han
Hao Wang
Tao Zhou
Jing Liu
Tianqi Liu
Yuwei Zhang
Kaiqi Chen
Qixing Wang
Zhexing Duan
Xin Zhou
Kenji Watanabe
Takashi Taniguchi
Jiaxu Yan
Yuan Huang
Yuwei Xiong
Joel K W Yang
Zhenliang Hu
Tao Xu
Litao Sun
Jinhua Hong
Yujie Zheng
Yumeng You
Qi Zhang
Junpeng Lu
Zhenhua Ni
- TILight-emitting diodes based on intercalated transition metal dichalcogenides with suppressed efficiency roll-off at high generation rates
- SONATURE ELECTRONICS
- LAEnglish
- DTArticle
- IDTOTAL-ENERGY CALCULATIONS; CONVERSION; EMISSION; MOS2
- ABThe capabilities of light-emitting diodes (LEDs) based on two-dimensional materials are restricted by efficiency roll-off, which is induced by exciton-exciton annihilation, at high current densities. Dielectric or strain engineering can be used to reduce exciton-exciton annihilation rates in monolayer transition metal dichalcogenides, but achieving electroluminescence in two-dimensional LEDs without efficiency roll-off is challenging. Here we describe pulsed LEDs that are based on intercalated transition metal dichalcogenides and offer suppressed exciton-exciton annihilation at high exciton generation rates. We intercalate oxygen plasma into few-layer molybdenum disulfide (MoS2) and tungsten disulfide (WS2) to create LEDs with a suppressed efficiency roll-off in both photo-excitation and electro-injection luminescence at all exciton densities up to around 1020 cm-2 s-1. We attribute this suppression to a reduced exciton Bohr radius and exciton diffusion coefficient, as extracted from optical spectroscopy measurements. LEDs based on intercalated MoS2 and WS2 operate at maximum external quantum efficiencies of 0.02% and 0.78%, respectively, at a generation rate of around 1020 cm-2 s-1.
- C1[Wang, Shixuan; Fu, Qiang; Zheng, Ting; Zhou, Tao; Liu, Jing; Liu, Tianqi; Zhang, Yuwei; Duan, Zhexing; Hu, Zhenliang; Zhang, Qi; Lu, Junpeng; Ni, Zhenhua] Southeast Univ, Minist Educ, Sch Phys, Key Lab Quantum Mat & Devices, Nanjing, Peoples R China.
[Han, Xu; Huang, Yuan] Beijing Inst Technol, Adv Res Inst Multidisciplinary Sci, Beijing, Peoples R China. [Wang, Hao; Yang, Joel K. W.] Singapore Univ Technol & Design, Engn Prod Dev Pillar, Singapore, Singapore. [Chen, Kaiqi; Xiong, Yuwei; Xu, Tao; Sun, Litao] Southeast Univ, Minist Educ, SEU FEI Nanop Ctr, Key Lab MEMS, Nanjing, Peoples R China. [Wang, Qixing] Xiamen Univ, Coll Phys Sci & Technol, Xiamen, Peoples R China. [Zhou, Xin] Natl Univ Singapore, Inst Funct Intelligent Mat, Singapore, Singapore. [Watanabe, Kenji] Natl Inst Mat Sci, Res Ctr Elect & Opt Mat, Tsukuba, Japan. [Taniguchi, Takashi] Natl Inst Mat Sci, Res Ctr Mat Nanoarchitecton, Tsukuba, Japan. [Yan, Jiaxu] Chinese Acad Sci, Changchun Inst Opt Fine Mech & Phys, Changchun, Peoples R China. [Hong, Jinhua] Hunan Univ, Coll Mat Sci & Engn, Changsha, Peoples R China. [Zheng, Yujie] Chongqing Univ, Natl Innovat Ctr Ind Educ Integrat Energy Storage, Sch Energy & Power Engn, MOE Key Lab Low Grade Energy Utilizat Technol & Sy, Chongqing, Peoples R China. [You, Yumeng] Southeast Univ, Sch Chem & Chem Engn, Nanjing, Peoples R China. [Lu, Junpeng; Ni, Zhenhua] Southeast Univ, Sch Elect Sci & Engn, Nanjing, Peoples R China. [Ni, Zhenhua] Purple Mt Labs, Nanjing, Peoples R China - C3Southeast University - China; Beijing Institute of Technology; Singapore University of Technology & Design; Southeast University - China; Xiamen University; National University of Singapore; Institute for Functional Intelligent Materials (I-FIM); National Institute for Materials Science; National Institute for Materials Science; Chinese Academy of Sciences; Changchun Institute of Optics, Fine Mechanics & Physics, CAS; Hunan University; Chongqing University; Southeast University - China; Southeast University - China
- RPZhang, Q (corresponding author), Southeast Univ, Minist Educ, Sch Phys, Key Lab Quantum Mat & Devices, Nanjing, Peoples R China; Lu, JP (corresponding author), Southeast Univ, Sch Elect Sci & Engn, Nanjing, Peoples R China; Ni, ZH (corresponding author), Purple Mt Labs, Nanjing, Peoples R China
- FUNational Natural Science Foundation of China (National Science Foundation of China) [2022YFF0609801]; National Key Research and Development Program of China [12004057]; National Natural Science Foundation of China [BK20230831]; Natural Science Foundation of Jiangsu Province [SKI 2021-04-12]; Singapore University of Technology and Design through the Kickstarter Initiative [CSTB2022NSCQ-MSX1183]; Natural Science Foundation of Chongqing [21H05233, 23H02052]; Japan Society for the Promotion of Science; World Premier International Research Center Initiative, Ministry of Education, Culture, Sports, Science and Technology, Japan
- FXJ.P.L. acknowledges the National Key Research and Development Program of China (Grant No. 2023YFB3611400) and the National Natural Science Foundation of China (Grant No. 62174026). Z.H.N. acknowledges the National Natural Science Foundation of China (Grant Nos. 62225404, 61927808 and T2321002) and a major project of the Natural Science Foundation of Jiangsu Province (Grant Nos. BK20222007 and BK20232044). Q.Z. acknowledges the National Natural Science Foundation of China (Grant Nos. 12304465 and 62320106004), the Natural Science Foundation of Jiangsu Province (Grant No. BK20230831) and the National Key Research and Development Program of China (Grant No. 2022YFF0609801). J.K.W.Y. acknowledges support from RIE2025 MTC Programmatic Grant No. M21J9b0085 and the Singapore University of Technology and Design through the Kickstarter Initiative (SKI 2021-04-12). Y.J.Z. acknowledges support from the National Natural Science Foundation of China (Grant No. 12004057) and the Natural Science Foundation of Chongqing (Grant No. CSTB2022NSCQ-MSX1183). K.W. and T.T. acknowledge support from the Japan Society for the Promotion of Science (KAKENHI Grant Nos. 21H05233 and 23H02052) and the World Premier International Research Center Initiative, Ministry of Education, Culture, Sports, Science and Technology, Japan. We thank Y. Zhao (ShanghaiTech University) for a helpful discussion on the transient LEDs. We thank H. Nan and S. Xiao (Jiangnan University) for a fruitful discussion on the plasma instrument. We thank Z. Han (Shanxi University) for a helpful discussion on FET transportation. We also thank X. Wang, Y. Xiong and J. Yao for helpful discussions regarding the KPFM measurements.
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Cheng, Man; Hu, Qifeng; Huang, Yuqiang; Ding, Chenyang; Qiang, Xiao-Bin; Hua, Chenqiang; Fang, Hanyan; Lu, Jiong; Peng, Yuxuan; Yang, Jinbo; Xi, Chuanying; Pi, Li; Watanabe, Kenji; Taniguchi, Takashi; Lu, Hai-Zhou; Novoselov, Kostya S; Lu, Yunhao; Zheng, Yi Quantum tunnelling with tunable spin geometric phases in van der Waals antiferromagnets NATURE PHYSICS, 2024, DOI: 10.1038/s41567-024-02675-x. Abstract | BibTeX | Endnote @article{ISI:001338064100001,
title = {Quantum tunnelling with tunable spin geometric phases in van der Waals antiferromagnets},
author = {Man Cheng and Qifeng Hu and Yuqiang Huang and Chenyang Ding and Xiao-Bin Qiang and Chenqiang Hua and Hanyan Fang and Jiong Lu and Yuxuan Peng and Jinbo Yang and Chuanying Xi and Li Pi and Kenji Watanabe and Takashi Taniguchi and Hai-Zhou Lu and Kostya S Novoselov and Yunhao Lu and Yi Zheng},
doi = {10.1038/s41567-024-02675-x},
times_cited = {0},
issn = {1745-2473},
year = {2024},
date = {2024-10-22},
journal = {NATURE PHYSICS},
publisher = {NATURE PORTFOLIO},
address = {HEIDELBERGER PLATZ 3, BERLIN, 14197, GERMANY},
abstract = {Electron tunnelling in solids, a fundamental quantum phenomenon, lays the foundation for various modern technologies. The emergence of van der Waals magnets presents opportunities for discovering unconventional tunnelling phenomena. Here, we demonstrate quantum tunnelling with tunable spin geometric phases in a multilayer van der Waals antiferromagnet CrPS4. The spin geometric phase of electron tunnelling is controlled by magnetic-field-dependent metamagnetic phase transitions. The square lattice of a CrPS4 monolayer causes strong t2g-orbital delocalization near the conduction band minimum. This creates a one-dimensional spin system with reversed energy ordering between the t2g and eg spin channels, which prohibits both intralayer spin relaxation by means of collective magnon excitations and interlayer spin hopping between the t2g and eg spin channels. The resulting coherent electron transmission shows pronounced tunnel magnetoresistance oscillations, manifesting quantum interference of cyclic quantum evolutions of individual electron Bloch waves by means of the time-reversal symmetrical tunnelling loops. Our results suggest the appearance of Aharonov-Anandan phases that originate from the non-adiabatic generalization of the Berry's phase.},
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Electron tunnelling in solids, a fundamental quantum phenomenon, lays the foundation for various modern technologies. The emergence of van der Waals magnets presents opportunities for discovering unconventional tunnelling phenomena. Here, we demonstrate quantum tunnelling with tunable spin geometric phases in a multilayer van der Waals antiferromagnet CrPS4. The spin geometric phase of electron tunnelling is controlled by magnetic-field-dependent metamagnetic phase transitions. The square lattice of a CrPS4 monolayer causes strong t2g-orbital delocalization near the conduction band minimum. This creates a one-dimensional spin system with reversed energy ordering between the t2g and eg spin channels, which prohibits both intralayer spin relaxation by means of collective magnon excitations and interlayer spin hopping between the t2g and eg spin channels. The resulting coherent electron transmission shows pronounced tunnel magnetoresistance oscillations, manifesting quantum interference of cyclic quantum evolutions of individual electron Bloch waves by means of the time-reversal symmetrical tunnelling loops. Our results suggest the appearance of Aharonov-Anandan phases that originate from the non-adiabatic generalization of the Berry's phase. - FNClarivate Analytics Web of Science
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- AUCheng, M
Hu, QF
Huang, YQ
Ding, CY
Qiang, XB
Hua, CQ
Fang, HY
Lu, J
Peng, YX
Yang, JB
Xi, CY
Pi, L
Watanabe, K
Taniguchi, T
Lu, HZ
Novoselov, KS
Lu, YH
Zheng, Y
- AFMan Cheng
Qifeng Hu
Yuqiang Huang
Chenyang Ding
Xiao-Bin Qiang
Chenqiang Hua
Hanyan Fang
Jiong Lu
Yuxuan Peng
Jinbo Yang
Chuanying Xi
Li Pi
Kenji Watanabe
Takashi Taniguchi
Hai-Zhou Lu
Kostya S Novoselov
Yunhao Lu
Yi Zheng
- TIQuantum tunnelling with tunable spin geometric phases in van der Waals antiferromagnets
- SONATURE PHYSICS
- LAEnglish
- DTArticle
- IDINTERFERENCE; FERROMAGNETISM
- ABElectron tunnelling in solids, a fundamental quantum phenomenon, lays the foundation for various modern technologies. The emergence of van der Waals magnets presents opportunities for discovering unconventional tunnelling phenomena. Here, we demonstrate quantum tunnelling with tunable spin geometric phases in a multilayer van der Waals antiferromagnet CrPS4. The spin geometric phase of electron tunnelling is controlled by magnetic-field-dependent metamagnetic phase transitions. The square lattice of a CrPS4 monolayer causes strong t2g-orbital delocalization near the conduction band minimum. This creates a one-dimensional spin system with reversed energy ordering between the t2g and eg spin channels, which prohibits both intralayer spin relaxation by means of collective magnon excitations and interlayer spin hopping between the t2g and eg spin channels. The resulting coherent electron transmission shows pronounced tunnel magnetoresistance oscillations, manifesting quantum interference of cyclic quantum evolutions of individual electron Bloch waves by means of the time-reversal symmetrical tunnelling loops. Our results suggest the appearance of Aharonov-Anandan phases that originate from the non-adiabatic generalization of the Berry's phase.
- C1[Cheng, Man; Hu, Qifeng; Huang, Yuqiang; Ding, Chenyang; Hua, Chenqiang; Lu, Yunhao; Zheng, Yi] Zhejiang Univ, Sch Phys, Hangzhou, Peoples R China.
[Cheng, Man; Hu, Qifeng; Huang, Yuqiang; Ding, Chenyang; Hua, Chenqiang; Lu, Yunhao; Zheng, Yi] Zhejiang Univ, State Key Lab Silicon Mat & Adv Semicond Mat, Hangzhou, Peoples R China. [Qiang, Xiao-Bin; Lu, Hai-Zhou] Southern Univ Sci & Technol SUSTech, Shenzhen Inst Quantum Sci & Engn, Shenzhen, Peoples R China. [Qiang, Xiao-Bin; Lu, Hai-Zhou] Southern Univ Sci & Technol SUSTech, Dept Phys, Shenzhen, Peoples R China. [Hua, Chenqiang] Beihang Hangzhou Innovat Inst Yuhang, Hangzhou, Peoples R China. [Fang, Hanyan; Lu, Jiong] Natl Univ Singapore, Dept Chem, Singapore, Singapore. [Fang, Hanyan; Lu, Jiong; Novoselov, Kostya S.] Natl Univ Singapore, Inst Funct Intelligent Mat, Singapore, Singapore. [Peng, Yuxuan; Yang, Jinbo] Peking Univ, Sch Phys, State Key Lab Artificial Microstruct & Mesoscop Ph, Beijing, Peoples R China. [Xi, Chuanying; Pi, Li] Chinese Acad Sci, High Magnet Field Lab, Hefei, Peoples R China. [Watanabe, Kenji; Taniguchi, Takashi] Natl Inst Mat Sci, Tsukuba, Japan. [Novoselov, Kostya S.] Natl Univ Singapore, Coll Design & Engn, Fac Engn, Dept Mat Sci & Engn, Singapore, Singapore - C3Zhejiang University; Zhejiang University; Southern University of Science & Technology; Southern University of Science & Technology; National University of Singapore; National University of Singapore; Institute for Functional Intelligent Materials (I-FIM); Peking University; Chinese Academy of Sciences; Hefei Institutes of Physical Science, CAS; National Institute for Materials Science; National University of Singapore
- RPLu, YH (corresponding author), Zhejiang Univ, Sch Phys, Hangzhou, Peoples R China; Lu, YH (corresponding author), Zhejiang Univ, State Key Lab Silicon Mat & Adv Semicond Mat, Hangzhou, Peoples R China
- FUNational Natural Science Foundation of China (National Science Foundation of China) [2023YFA1406302]; National Key R&D Programme of the MOST of China [12374194, 12241401]; National Science Foundation of China [D19A040001]; Zhejiang Provincial Natural Science Foundation [2021HSC-UE007]; Users with Excellence Project of Hefei Science Center CAS
- FXThis work was supported by the National Key R&D Programme of the MOST of China (Grant No. 2023YFA1406302 to Y.Z.), the National Science Foundation of China (Grant Nos. 12374194 and 12241401 to Y.Z. and J.B.Y., respectively) and the Zhejiang Provincial Natural Science Foundation (D19A040001 to Y.Z.). Y.Z. acknowledges support from the Users with Excellence Project of Hefei Science Center CAS, 2021HSC-UE007.
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- PUNATURE PORTFOLIO
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