Publications
2026 |
Wang, Huiqing; Geng, Yuhao; Zhao, Yadi; Zheng, Jinyu; Chen, Zhuo; Xu, Jianhong Efficient and controllable synthesis of High-Performance CsPbI3 nanocrystals based on a microreactor system CHEMICAL ENGINEERING SCIENCE, 335 , 2026, DOI: 10.1016/j.ces.2026.124440. @article{WOS:001800417800001, title = {Efficient and controllable synthesis of High-Performance CsPbI3 nanocrystals based on a microreactor system}, author = {Huiqing Wang and Yuhao Geng and Yadi Zhao and Jinyu Zheng and Zhuo Chen and Jianhong Xu}, doi = {10.1016/j.ces.2026.124440}, times_cited = {0}, issn = {0009-2509}, year = {2026}, date = {2026-11-01}, journal = {CHEMICAL ENGINEERING SCIENCE}, volume = {335}, publisher = {PERGAMON-ELSEVIER SCIENCE LTD}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND}, abstract = {The application of CsPbI3 nanocrystals (NCs) with excellent optical properties remains challenging due to their intrinsic environmental instability and low productivity by traditional batch methods. Here, we introduce a droplet-flow microreactor system for the efficient and controlled synthesis of CsPbI3 NCs modified with poly (maleic anhydride-alt-1-octadecene) (PMA). Optimized within this system, the required PMA addition is reduced by 50 % compared to batch synthesis, while the resulting NCs exhibit a narrower emission peak, a higher photoluminescence quantum yield (PLQY) of 89 %, and an extended fluorescence lifetime. The strong Pb-O bond formed between PMA and the NC surface effectively passivates defects and enhances the environmental stability of CsPbI3 NCs, with more than 75 % PLQY retained even after 40 days in water. Moreover, the system enables gram-scale production of high-performance CsPbI3 nanocrystals in only 20 min. Red LED devices fabricated using these CsPbI3 NCs as a color-conversion layer exceed the latest Rec. 2020 display standards on the CIE chromaticity coordinates.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The application of CsPbI3 nanocrystals (NCs) with excellent optical properties remains challenging due to their intrinsic environmental instability and low productivity by traditional batch methods. Here, we introduce a droplet-flow microreactor system for the efficient and controlled synthesis of CsPbI3 NCs modified with poly (maleic anhydride-alt-1-octadecene) (PMA). Optimized within this system, the required PMA addition is reduced by 50 % compared to batch synthesis, while the resulting NCs exhibit a narrower emission peak, a higher photoluminescence quantum yield (PLQY) of 89 %, and an extended fluorescence lifetime. The strong Pb-O bond formed between PMA and the NC surface effectively passivates defects and enhances the environmental stability of CsPbI3 NCs, with more than 75 % PLQY retained even after 40 days in water. Moreover, the system enables gram-scale production of high-performance CsPbI3 nanocrystals in only 20 min. Red LED devices fabricated using these CsPbI3 NCs as a color-conversion layer exceed the latest Rec. 2020 display standards on the CIE chromaticity coordinates.
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Deng, Ya; Han, Zi-Yi; Wu, Yao; Yi, Kongyang; Ren, Ya-Ning; Yuan, Dundong; Zhu, Chao; He, Lin; Liu, Zheng Controlled chemical vapor deposition for synthesis of emerging Mo(W)Te2 systems MATERIALS TODAY, 98 , 2026, DOI: 10.1016/j.mattod.2026.103390. @article{WOS:001793998200001, title = {Controlled chemical vapor deposition for synthesis of emerging Mo(W)Te2 systems}, author = {Ya Deng and Zi-Yi Han and Yao Wu and Kongyang Yi and Ya-Ning Ren and Dundong Yuan and Chao Zhu and Lin He and Zheng Liu}, doi = {10.1016/j.mattod.2026.103390}, times_cited = {0}, issn = {1369-7021}, year = {2026}, date = {2026-09-01}, journal = {MATERIALS TODAY}, volume = {98}, publisher = {ELSEVIER SCI LTD}, address = {125 London Wall, London, ENGLAND}, abstract = {The Group-VI transition metal ditellurides offer a rich platform for correlated and topological phenomena, yet their structural polymorphism and instability complicate the creation of single crystals and heterointerfaces. Here, we introduce a confined-space chemical vapor deposition (CVD) strategy that lowers the growth temperature window and, when combined with tailored precursor configurations and stepwise thermal ramps, enables the deterministic synthesis of high-quality single crystals, alloys, and lateral/vertical heterostructures. High-resolution aberration-corrected STEM provides atomic characterization of lattice-matched Mo(W)Te2 lateral heterostructure, revealing nearly atomically sharp, compositionally well-defined seamless boundaries. This approach avoids the thickness nonuniformity and structural limitations commonly associated with exfoliated samples, enabling reproducible fabrication of clean heterointerfaces and establishing a nearly ideal in-situ experimental system. Furthermore, scanning tunneling microscopy and spectroscopy (STM and STS) enable direct imaging of the seamless boundaries in Mo(W)Te2 lateral heterostructures, while uncovering their distinct real-space distributions of the local density of states. Our results establish a scalable pathway for engineering crystalline Te-based structures with controlled geometry and stacking, providing an essential step toward quantum and topological device platforms based on the transition metal ditellurides family.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The Group-VI transition metal ditellurides offer a rich platform for correlated and topological phenomena, yet their structural polymorphism and instability complicate the creation of single crystals and heterointerfaces. Here, we introduce a confined-space chemical vapor deposition (CVD) strategy that lowers the growth temperature window and, when combined with tailored precursor configurations and stepwise thermal ramps, enables the deterministic synthesis of high-quality single crystals, alloys, and lateral/vertical heterostructures. High-resolution aberration-corrected STEM provides atomic characterization of lattice-matched Mo(W)Te2 lateral heterostructure, revealing nearly atomically sharp, compositionally well-defined seamless boundaries. This approach avoids the thickness nonuniformity and structural limitations commonly associated with exfoliated samples, enabling reproducible fabrication of clean heterointerfaces and establishing a nearly ideal in-situ experimental system. Furthermore, scanning tunneling microscopy and spectroscopy (STM and STS) enable direct imaging of the seamless boundaries in Mo(W)Te2 lateral heterostructures, while uncovering their distinct real-space distributions of the local density of states. Our results establish a scalable pathway for engineering crystalline Te-based structures with controlled geometry and stacking, providing an essential step toward quantum and topological device platforms based on the transition metal ditellurides family.
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Mule, Anki Reddy; Ramulu, Bhimanaboina; Arbaz, Shaik Junied; Chung, Chan-Hwa; Yu, Jae Su Design of heterogeneous core-shell structured Ni-incorporated MnOOH enclosed CoCe carbonate hydroxide network for ultrahigh-capacity supercapacitors CHEMICAL ENGINEERING JOURNAL, 541 , 2026, DOI: 10.1016/j.cej.2026.176895. @article{WOS:001784991300001, title = {Design of heterogeneous core-shell structured Ni-incorporated MnOOH enclosed CoCe carbonate hydroxide network for ultrahigh-capacity supercapacitors}, author = {Anki Reddy Mule and Bhimanaboina Ramulu and Shaik Junied Arbaz and Chan-Hwa Chung and Jae Su Yu}, doi = {10.1016/j.cej.2026.176895}, times_cited = {0}, issn = {1385-8947}, year = {2026}, date = {2026-08-01}, journal = {CHEMICAL ENGINEERING JOURNAL}, volume = {541}, publisher = {ELSEVIER SCIENCE SA}, address = {PO BOX 564, 1001 LAUSANNE, SWITZERLAND}, abstract = {The development of metal carbonate hydroxides (CHs)-based high-performance supercapacitors (SCs) is still in its early stages despite the extensive research on their applications as industrial precursors. Moreover, owing to their limitations of structural stability, capacity and rate retention remain unsatisfactory. Herein, we report the core-shell design of heterostructured cobalt cerium CHs (CoCeCHs) and nickel-incorporated manganese oxide hydroxides (NiMnOHs) with the assembling of CoCeCHs nanowire array and NiMnOHs nanosheet array via a facile preparation process. With its distinct nanostructure and the synergistic result of two constituents, the asdeveloped CoCeCHs@NiMnOHs electrode exhibits ultrahigh areal capacity value of 2129.11 & micro;Ah cm- 2 at 5 mA cm- 2, superb rate retention of 1198.23 & micro;A h cm- 2 at 60 mA cm- 2, and good cycling stability. Moreover, the practicability of the CoCeCHs@NiMnOHs electrode is also verified by assembling a pouch-type hybrid electrochemical cell (PHEC). The constructed PHEC delivers an excellent areal capacity value of 1365.68 & micro;A h cm- 2 at 15 mA cm- 2 with a rate performance of 822.91 & micro;A h cm- 2 at 80 mA cm- 2. Also, the PHEC provides a superior energy density value of 1.04 mW h cm- 2 with a power density value of 14.54 mW cm- 2 at 15 mA cm- 2 as well as the power and energy density values of 65.83 mW cm- 2 and 0.52 mW h cm- 2 at 80 mA cm- 2, respectively, demonstrating superior energy storage performance. This study demonstrates the significance of heterostructured electrodes composed of CHs and OHs for developing hybrid SCs in practical applications.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The development of metal carbonate hydroxides (CHs)-based high-performance supercapacitors (SCs) is still in its early stages despite the extensive research on their applications as industrial precursors. Moreover, owing to their limitations of structural stability, capacity and rate retention remain unsatisfactory. Herein, we report the core-shell design of heterostructured cobalt cerium CHs (CoCeCHs) and nickel-incorporated manganese oxide hydroxides (NiMnOHs) with the assembling of CoCeCHs nanowire array and NiMnOHs nanosheet array via a facile preparation process. With its distinct nanostructure and the synergistic result of two constituents, the asdeveloped CoCeCHs@NiMnOHs electrode exhibits ultrahigh areal capacity value of 2129.11 & micro;Ah cm- 2 at 5 mA cm- 2, superb rate retention of 1198.23 & micro;A h cm- 2 at 60 mA cm- 2, and good cycling stability. Moreover, the practicability of the CoCeCHs@NiMnOHs electrode is also verified by assembling a pouch-type hybrid electrochemical cell (PHEC). The constructed PHEC delivers an excellent areal capacity value of 1365.68 & micro;A h cm- 2 at 15 mA cm- 2 with a rate performance of 822.91 & micro;A h cm- 2 at 80 mA cm- 2. Also, the PHEC provides a superior energy density value of 1.04 mW h cm- 2 with a power density value of 14.54 mW cm- 2 at 15 mA cm- 2 as well as the power and energy density values of 65.83 mW cm- 2 and 0.52 mW h cm- 2 at 80 mA cm- 2, respectively, demonstrating superior energy storage performance. This study demonstrates the significance of heterostructured electrodes composed of CHs and OHs for developing hybrid SCs in practical applications.
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Ren, Wencai; Boggild, Peter; Redwing, Joan; Novoselov, Kostya S; Sun, Luzhao; Qi, Yue; Jia, Kaicheng; Liu, Zhongfan; Burton, Oliver; Alexander-Webber, Jack; Hofmann, Stephan; Cao, Yang; Long, Yu; Yang, Quan-Hong; Li, Dan; Choi, Soo Ho; Kim, Ki Kang; Lee, Young Hee; Li, Mian; Huang, Qing; Gogotsi, Yury; Clark, Nicholas; Carl, Amy; Gorbachev, Roman; Olsen, Thomas; Rosen, Johanna; Thygesen, Kristian Sommer; Efetov, Dmitri K; Jessen, Bjarke S; Yankowitz, Matthew; Barrier, Julien; Kumar, Roshan Krishna; Koppens, Frank H L; Deng, Hui; Li, Xiaoqin; Dai, Siyuan; Basov, D N; Wang, Xinran; Das, Saptarshi; Duan, Xiangfeng; Yu, Zhihao; Borsch, Markus; Ferrari, Andrea C; Huber, Rupert; Kira, Mackillo; Xia, Fengnian; Wang, Xiao; Wu, Zhong-Shuai; Feng, Xinliang; Simon, Patrice; Cheng, Hui-Ming; Liu, Bilu; Xie, Yi; Jin, Wanqin; Nair, Rahul Raveendran; Xu, Yan; Zhang, Qing; Katiyar, Ajit K; Ahn, Jong-Hyun; Aharonovich, Igor; Hersam, Mark C; Roche, Stephan; Hua, Qilin; Shen, Guozhen; Ren, Tianling; Zhang, Hao-Bin; Koo, Chong Min; Koratkar, Nikhil; Pellegrini, Vittorio; Young, Robert J; Qu, Bill; Lemme, Max; Pollard, Andrew J The 2D materials roadmap 20 2D MATERIALS, 13 (2), 2026, DOI: 10.1088/2053-1583/ae2b82. @article{WOS:001718544600001, title = {The 2D materials roadmap}, author = {Wencai Ren and Peter Boggild and Joan Redwing and Kostya S Novoselov and Luzhao Sun and Yue Qi and Kaicheng Jia and Zhongfan Liu and Oliver Burton and Jack Alexander-Webber and Stephan Hofmann and Yang Cao and Yu Long and Quan-Hong Yang and Dan Li and Soo Ho Choi and Ki Kang Kim and Young Hee Lee and Mian Li and Qing Huang and Yury Gogotsi and Nicholas Clark and Amy Carl and Roman Gorbachev and Thomas Olsen and Johanna Rosen and Kristian Sommer Thygesen and Dmitri K Efetov and Bjarke S Jessen and Matthew Yankowitz and Julien Barrier and Roshan Krishna Kumar and Frank H L Koppens and Hui Deng and Xiaoqin Li and Siyuan Dai and D N Basov and Xinran Wang and Saptarshi Das and Xiangfeng Duan and Zhihao Yu and Markus Borsch and Andrea C Ferrari and Rupert Huber and Mackillo Kira and Fengnian Xia and Xiao Wang and Zhong-Shuai Wu and Xinliang Feng and Patrice Simon and Hui-Ming Cheng and Bilu Liu and Yi Xie and Wanqin Jin and Rahul Raveendran Nair and Yan Xu and Qing Zhang and Ajit K Katiyar and Jong-Hyun Ahn and Igor Aharonovich and Mark C Hersam and Stephan Roche and Qilin Hua and Guozhen Shen and Tianling Ren and Hao-Bin Zhang and Chong Min Koo and Nikhil Koratkar and Vittorio Pellegrini and Robert J Young and Bill Qu and Max Lemme and Andrew J Pollard}, doi = {10.1088/2053-1583/ae2b82}, times_cited = {20}, issn = {2053-1583}, year = {2026}, date = {2026-06-01}, journal = {2D MATERIALS}, volume = {13}, number = {2}, publisher = {IOP Publishing Ltd}, address = {No.2 The Distillery, Glassfields, Avon Street, Bristol, ENGLAND}, abstract = {Over the past two decades, two-dimensional (2D) materials have rapidly evolved into a diverse and expanding family of material platforms. Many members of this materials class have demonstrated their potential to deliver transformative impact on fundamental research and technological applications across different fields. In this roadmap, we provide an overview of the key aspects of 2D material research and development, spanning synthesis, properties and commercial applications. We specifically present roadmaps for high impact 2D materials, including graphene and its derivatives, transition metal dichalcogenides, MXenes as well as their heterostructures and moir & eacute; systems. The discussions are organized into thematic sections covering emerging research areas (e.g. twisted electronics, moir & eacute; nano-optoelectronics, polaritronics, quantum photonics, and neuromorphic computing), breakthrough applications in key technologies (e.g. 2D transistors, energy storage, electrocatalysis, filtration and separation, thermal management, flexible electronics, sensing, electromagnetic interference shielding, and composites) and other important topics (computational discovery of novel materials, commercialization and standardization). This roadmap focuses on the current research landscape, future challenges and scientific and technological advances required to address, with the intent to provide useful references for promoting the development of 2D materials.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Over the past two decades, two-dimensional (2D) materials have rapidly evolved into a diverse and expanding family of material platforms. Many members of this materials class have demonstrated their potential to deliver transformative impact on fundamental research and technological applications across different fields. In this roadmap, we provide an overview of the key aspects of 2D material research and development, spanning synthesis, properties and commercial applications. We specifically present roadmaps for high impact 2D materials, including graphene and its derivatives, transition metal dichalcogenides, MXenes as well as their heterostructures and moir & eacute; systems. The discussions are organized into thematic sections covering emerging research areas (e.g. twisted electronics, moir & eacute; nano-optoelectronics, polaritronics, quantum photonics, and neuromorphic computing), breakthrough applications in key technologies (e.g. 2D transistors, energy storage, electrocatalysis, filtration and separation, thermal management, flexible electronics, sensing, electromagnetic interference shielding, and composites) and other important topics (computational discovery of novel materials, commercialization and standardization). This roadmap focuses on the current research landscape, future challenges and scientific and technological advances required to address, with the intent to provide useful references for promoting the development of 2D materials.
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Wang, Xinyuan; Chen, Zhongxin; Hu, Zhubin; Zhang, Yu; Zhang, Xun; Yang, Xueqin; Zhou, Xichen; Zhong, Wentao; Zhu, Xinyan; Li, Xin; Xie, Huilin; Lam, Jacky W Y; Sun, Jianwei; Sun, Haitao; Liang, Yongye; Tang, Ben Zhong Tuning J-Aggregation Behavior of Fused Ring Acceptor Fluorophore within Nanoparticles for NIR-II Excitable Bioimaging with High Brightness ACS NANO, 20 (21), pp. 15675-15687, 2026, DOI: 10.1021/acsnano.6c05038. @article{WOS:001770237400001, title = {Tuning J-Aggregation Behavior of Fused Ring Acceptor Fluorophore within Nanoparticles for NIR-II Excitable Bioimaging with High Brightness}, author = {Xinyuan Wang and Zhongxin Chen and Zhubin Hu and Yu Zhang and Xun Zhang and Xueqin Yang and Xichen Zhou and Wentao Zhong and Xinyan Zhu and Xin Li and Huilin Xie and Jacky W Y Lam and Jianwei Sun and Haitao Sun and Yongye Liang and Ben Zhong Tang}, doi = {10.1021/acsnano.6c05038}, times_cited = {0}, issn = {1936-0851}, year = {2026}, date = {2026-06-01}, journal = {ACS NANO}, volume = {20}, number = {21}, pages = {15675-15687}, publisher = {AMER CHEMICAL SOC}, address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA}, abstract = {Fluorescence imaging in the near-infrared-IIb (NIR-IIb, 1500-1700 nm) window offers high signal-to-background ratios (SBRs). However, the development of bright NIR-IIb fluorophores remains challenging due to the trade-off between long-wavelength absorption and brightness. In this study, we present a molecular design strategy that bypasses this limitation by inducing J-aggregation to redshift the absorption while maintaining an optimized bandgap with a high radiative decay rate. A quinoidal thieno[3,4-b]thiophene pi-bridge is incorporated to synthesize a fused-ring acceptor fluorophore, CTTIC-4F, affording J-aggregation in encapsulated nanoparticles (NPs) with enhanced brightness. The CTTIC-4F NPs display strongly red-shifted absorption peaked at 1017 nm and an improved fluorescence quantum yield of 0.44% in aqueous solutions, outperforming counterparts with conventional pi-bridges. The molecular dynamics simulations indicate compact and spherical aggregates of CTTIC-4F due to strong pi-pi interactions in aqueous solutions, consistent with J-type packing. In vivo imaging demonstrates that the CTTIC-4F NPs achieve a high SBR of 8.26 in vascular imaging and ultrahigh SBRs for lymph system imaging under the 1064 nm laser excitation, enabling high-contrast NIR-IIb lymph system imaging and image-guided resection of tumor-draining sentinel lymph nodes. These results demonstrate the effectiveness of aggregation-regulated molecular design for NIR-IIb fluorophores.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Fluorescence imaging in the near-infrared-IIb (NIR-IIb, 1500-1700 nm) window offers high signal-to-background ratios (SBRs). However, the development of bright NIR-IIb fluorophores remains challenging due to the trade-off between long-wavelength absorption and brightness. In this study, we present a molecular design strategy that bypasses this limitation by inducing J-aggregation to redshift the absorption while maintaining an optimized bandgap with a high radiative decay rate. A quinoidal thieno[3,4-b]thiophene pi-bridge is incorporated to synthesize a fused-ring acceptor fluorophore, CTTIC-4F, affording J-aggregation in encapsulated nanoparticles (NPs) with enhanced brightness. The CTTIC-4F NPs display strongly red-shifted absorption peaked at 1017 nm and an improved fluorescence quantum yield of 0.44% in aqueous solutions, outperforming counterparts with conventional pi-bridges. The molecular dynamics simulations indicate compact and spherical aggregates of CTTIC-4F due to strong pi-pi interactions in aqueous solutions, consistent with J-type packing. In vivo imaging demonstrates that the CTTIC-4F NPs achieve a high SBR of 8.26 in vascular imaging and ultrahigh SBRs for lymph system imaging under the 1064 nm laser excitation, enabling high-contrast NIR-IIb lymph system imaging and image-guided resection of tumor-draining sentinel lymph nodes. These results demonstrate the effectiveness of aggregation-regulated molecular design for NIR-IIb fluorophores.
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Zhang, Gaojie; Jin, Wen; Wu, Hao; Yang, Li; Zhang, Wenfeng; Novoselov, Kostya S; Chang, Haixin Near- or Above-Room-Temperature Two-Dimensional Ferromagnetic Fe-M-Te (M = Ge, Ga) Compounds for van der Waals Spintronics NANO LETTERS, 26 (22), pp. 7193-7208, 2026, DOI: 10.1021/acs.nanolett.6c00789. @article{WOS:001781190000001, title = {Near- or Above-Room-Temperature Two-Dimensional Ferromagnetic Fe-M-Te (M = Ge, Ga) Compounds for van der Waals Spintronics}, author = {Gaojie Zhang and Wen Jin and Hao Wu and Li Yang and Wenfeng Zhang and Kostya S Novoselov and Haixin Chang}, doi = {10.1021/acs.nanolett.6c00789}, times_cited = {0}, issn = {1530-6984}, year = {2026}, date = {2026-06-01}, journal = {NANO LETTERS}, volume = {26}, number = {22}, pages = {7193-7208}, publisher = {AMER CHEMICAL SOC}, address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA}, abstract = {Two-dimensional (2D) van der Waals (vdW) ferromagnets are promising for the development of novel physical paradigms and next-generation spintronics. However, their practical applications are limited by a low Curie temperature (T-C) and the strong thickness dependence of T-C, which decreases significantly toward the 2D limit. 2D Fe-M-Te (M = Ge, Ga) compounds have emerged as key platforms, exhibiting intrinsic ferromagnetism below but near room temperature in few-layer Fe-Ge-Te and above room temperature in few-layer Fe-Ga-Te. This review discusses their recent advances and challenges, especially about the first well above-room-temperature intrinsic 2D vdW ferromagnet Fe3GaTe2 which makes room-temperature practical 2D spintronic and quantum devices possible. The preparation and properties are first summarized, followed by magnetism regulation strategies (e.g., doping, pressure, electrical control, and interfacial engineering) and vdW spintronics (e.g., topological spin textures, vertical spin valves, and spin/orbital torque devices). Finally, some fundamental and technological challenges are highlighted, providing insights into room-temperature spintronics based on vdW ferromagnets.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Two-dimensional (2D) van der Waals (vdW) ferromagnets are promising for the development of novel physical paradigms and next-generation spintronics. However, their practical applications are limited by a low Curie temperature (T-C) and the strong thickness dependence of T-C, which decreases significantly toward the 2D limit. 2D Fe-M-Te (M = Ge, Ga) compounds have emerged as key platforms, exhibiting intrinsic ferromagnetism below but near room temperature in few-layer Fe-Ge-Te and above room temperature in few-layer Fe-Ga-Te. This review discusses their recent advances and challenges, especially about the first well above-room-temperature intrinsic 2D vdW ferromagnet Fe3GaTe2 which makes room-temperature practical 2D spintronic and quantum devices possible. The preparation and properties are first summarized, followed by magnetism regulation strategies (e.g., doping, pressure, electrical control, and interfacial engineering) and vdW spintronics (e.g., topological spin textures, vertical spin valves, and spin/orbital torque devices). Finally, some fundamental and technological challenges are highlighted, providing insights into room-temperature spintronics based on vdW ferromagnets.
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Song, Jeongin; Hwang, Se Min; Kim, Taehyeon; Myoung, Jaemin; Jung, Euna; Son, Sihoon; Choi, Min Sup; Lee, Jae- Hyun; Kang, Sang- Woo; Kim, Taesung; Mun, Jihun 3D Hierarchical MoS2-Based Piezoresistive Pressure Sensors With Ultrahigh Sensitivity and Wide Dynamic Range ADVANCED FUNCTIONAL MATERIALS, 2026, DOI: 10.1002/adfm.202531664. @article{WOS:001786453700001, title = {3D Hierarchical MoS2-Based Piezoresistive Pressure Sensors With Ultrahigh Sensitivity and Wide Dynamic Range}, author = {Jeongin Song and Se Min Hwang and Taehyeon Kim and Jaemin Myoung and Euna Jung and Sihoon Son and Min Sup Choi and Jae- Hyun Lee and Sang- Woo Kang and Taesung Kim and Jihun Mun}, doi = {10.1002/adfm.202531664}, times_cited = {0}, issn = {1616-301X}, year = {2026}, date = {2026-06-01}, journal = {ADVANCED FUNCTIONAL MATERIALS}, publisher = {WILEY-V C H VERLAG GMBH}, address = {POSTFACH 101161, 69451 WEINHEIM, GERMANY}, abstract = {The rapid advancements in artificial intelligence, wearable devices, and the Internet of Things underscore the growing importance of sensor technology, particularly pressure sensors, for driving innovation across various fields. Wide-dynamic-range pressure sensors that exhibit high sensitivity without being biased toward a specific range are therefore needed. We propose an ultrahigh-sensitivity, wide-dynamic-range pressure sensor that integrates 3D hierarchical (3DH) MoS2 as the sensing material with a polymer cavity structure. 3DH MoS2 is directly synthesized on a polymer substrate using a low-temperature metal-organic chemical vapor deposition process, eliminating the need for additional patterning. The fabricated pressure sensor, with a sensitivity of similar to 23 000 kPa-1, benefits from the hierarchical multiscale structure, and the polymer cavity enables detection across a broad range of 0.135-80 kPa. Furthermore, by optimizing the synthesis conditions, we demonstrate that the sensitivity and detection range of the sensor are influenced by the material composition. These studies not only lay the foundation for the development of next-generation wearable electronics but also are expected to broaden the application scope of 3D-structured transition-metal dichalcogenides in sensor technologies.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The rapid advancements in artificial intelligence, wearable devices, and the Internet of Things underscore the growing importance of sensor technology, particularly pressure sensors, for driving innovation across various fields. Wide-dynamic-range pressure sensors that exhibit high sensitivity without being biased toward a specific range are therefore needed. We propose an ultrahigh-sensitivity, wide-dynamic-range pressure sensor that integrates 3D hierarchical (3DH) MoS2 as the sensing material with a polymer cavity structure. 3DH MoS2 is directly synthesized on a polymer substrate using a low-temperature metal-organic chemical vapor deposition process, eliminating the need for additional patterning. The fabricated pressure sensor, with a sensitivity of similar to 23 000 kPa-1, benefits from the hierarchical multiscale structure, and the polymer cavity enables detection across a broad range of 0.135-80 kPa. Furthermore, by optimizing the synthesis conditions, we demonstrate that the sensitivity and detection range of the sensor are influenced by the material composition. These studies not only lay the foundation for the development of next-generation wearable electronics but also are expected to broaden the application scope of 3D-structured transition-metal dichalcogenides in sensor technologies.
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Yang, Kun; Wang, Lei; Novoselov, Kostya S; Pan, Hongge; Wang, Lu-Ning; Sun, Lixian Nanomechanical insights into bacterial adhesion on biomaterials using AFM-based force spectroscopy ACTA BIOMATERIALIA, 216 , pp. 22-50, 2026, DOI: 10.1016/j.actbio.2026.04.015. @article{WOS:001773048900001, title = {Nanomechanical insights into bacterial adhesion on biomaterials using AFM-based force spectroscopy}, author = {Kun Yang and Lei Wang and Kostya S Novoselov and Hongge Pan and Lu-Ning Wang and Lixian Sun}, doi = {10.1016/j.actbio.2026.04.015}, times_cited = {0}, issn = {1742-7061}, year = {2026}, date = {2026-06-01}, journal = {ACTA BIOMATERIALIA}, volume = {216}, pages = {22-50}, publisher = {ELSEVIER SCI LTD}, address = {125 London Wall, London, ENGLAND}, abstract = {Bacterial adhesion to biomaterials/tissues can lead to inevitable infection, inflammation, and even death, posing a serious threat to human health. An in-depth understanding of interactions between bacteria and biomaterial surfaces could provide effective strategies for inhibiting bacterial adhesion. Adhesion behavior can be quantified using adhesion forces measured by atomic force microscopy (AFM)-based force spectroscopy. Although AFMbased force spectroscopy has been applied to investigate bacterial adhesion, the effect of biomaterials (including metals, ceramics, polymers, and cells) and surface modifications (including patterning and coating) on bacterial adhesion forces has not been systematically summarized. Therefore, this review provides a comprehensive overview of recent developments in bacterial adhesion on biomaterials, focusing on the use of AFMbased force spectroscopy with bacterial probes. Surface topography on metals and ceramics reduces the contact area and inhibits bacterial adhesion. Coatings and chemical modifications on ceramic surfaces can either inhibit or promote bacterial adhesion, depending on the surface properties. The discussion about the bacterial adhesion on different biomaterial surfaces would benefit the inhibition of adhesion and the rational surface design for enhanced antibacterial properties. Statement of Significance: The growing threat of antimicrobial resistance has led to increased interest in developing antibacterial materials with tailored surface properties. A critical aspect of understanding bacterial adhesion on surfaces is quantifying bacterial adhesion forces, often using atomic force microscopy (AFM)-based force spectroscopy. While numerous studies have explored how biomaterials and surface modifications influence bacterial adhesion, a systematic review focusing on the nanomechanical aspects of adhesion forces is lacking. Here, a broad overview of the state-of-the-art research addresses this gap by summarizing the influence of biomaterials and surface modifications on bacterial adhesion forces in the context of AFM-based force spectroscopy. It will be of interest to researchers designing more effective antimicrobial materials and surfaces.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Bacterial adhesion to biomaterials/tissues can lead to inevitable infection, inflammation, and even death, posing a serious threat to human health. An in-depth understanding of interactions between bacteria and biomaterial surfaces could provide effective strategies for inhibiting bacterial adhesion. Adhesion behavior can be quantified using adhesion forces measured by atomic force microscopy (AFM)-based force spectroscopy. Although AFMbased force spectroscopy has been applied to investigate bacterial adhesion, the effect of biomaterials (including metals, ceramics, polymers, and cells) and surface modifications (including patterning and coating) on bacterial adhesion forces has not been systematically summarized. Therefore, this review provides a comprehensive overview of recent developments in bacterial adhesion on biomaterials, focusing on the use of AFMbased force spectroscopy with bacterial probes. Surface topography on metals and ceramics reduces the contact area and inhibits bacterial adhesion. Coatings and chemical modifications on ceramic surfaces can either inhibit or promote bacterial adhesion, depending on the surface properties. The discussion about the bacterial adhesion on different biomaterial surfaces would benefit the inhibition of adhesion and the rational surface design for enhanced antibacterial properties. Statement of Significance: The growing threat of antimicrobial resistance has led to increased interest in developing antibacterial materials with tailored surface properties. A critical aspect of understanding bacterial adhesion on surfaces is quantifying bacterial adhesion forces, often using atomic force microscopy (AFM)-based force spectroscopy. While numerous studies have explored how biomaterials and surface modifications influence bacterial adhesion, a systematic review focusing on the nanomechanical aspects of adhesion forces is lacking. Here, a broad overview of the state-of-the-art research addresses this gap by summarizing the influence of biomaterials and surface modifications on bacterial adhesion forces in the context of AFM-based force spectroscopy. It will be of interest to researchers designing more effective antimicrobial materials and surfaces.
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Li, Yahao; Wang, Yuqing; Zheng, Mei; Zhang, Chenguang; Ma, Mingyu; Hippalgaonkar, Kedar; Li, Shuzhou; Wu, Meng; Liu, Zheng; Si, Wenping Atomic-level ionic polarization in poly(heptazine imides) towards enhanced photocatalytic H2O2 production CHEMICAL ENGINEERING JOURNAL, 538 , 2026, DOI: 10.1016/j.cej.2026.176636. @article{WOS:001761156300001, title = {Atomic-level ionic polarization in poly(heptazine imides) towards enhanced photocatalytic H2O2 production}, author = {Yahao Li and Yuqing Wang and Mei Zheng and Chenguang Zhang and Mingyu Ma and Kedar Hippalgaonkar and Shuzhou Li and Meng Wu and Zheng Liu and Wenping Si}, doi = {10.1016/j.cej.2026.176636}, times_cited = {0}, issn = {1385-8947}, year = {2026}, date = {2026-06-01}, journal = {CHEMICAL ENGINEERING JOURNAL}, volume = {538}, publisher = {ELSEVIER SCIENCE SA}, address = {PO BOX 564, 1001 LAUSANNE, SWITZERLAND}, abstract = {Polarization provides an effective pathway to regulate charge separation in photocatalytic materials, however, how to introduce polarization into organic photocatalysts without destroying pi-conjugation remains challenging. Here, we demonstrate that Na+ ions confined within the heptazine cavities of crystalline poly(heptazine imides) (PHI) generate intrinsic ionic polarization while preserving the pi-conjugated framework of carbon nitride. Detailed characterizations reveal that the atomic-level dipoles are induced by structural and electronic asymmetry due to the sodium ion incorporation within the PHI lattice, directing from sodium (Na+) to the adjacent nitrogen. Piezoresponse force microscopy (PFM) measurements, X-ray absorption near-edge structure (XANES) analysis, and density functional theory (DFT) calculations collectively confirm the formation of localized dipoles and the resulting internal electric field, establishing a direct relationship between ionic polarization and charge separation. When applied in photocatalytic energy conversion, this PHI-Na exhibits the H2O2 production rate of 46.6 mmol g(-1) h(-1) and 59.5 mmol g(-1) h(-1) under visible light and AM1.5G, respectively, and the accumulated H2O2 concentration within 4 h reaches up to similar to 17 mM, which stands out among other organic semiconductor counterparts. This work reveals a structure-defined route to introduce ionic polarization in carbon nitride crystal and provides new insights into designing efficient metal-free photocatalysts for solar energy conversion.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Polarization provides an effective pathway to regulate charge separation in photocatalytic materials, however, how to introduce polarization into organic photocatalysts without destroying pi-conjugation remains challenging. Here, we demonstrate that Na+ ions confined within the heptazine cavities of crystalline poly(heptazine imides) (PHI) generate intrinsic ionic polarization while preserving the pi-conjugated framework of carbon nitride. Detailed characterizations reveal that the atomic-level dipoles are induced by structural and electronic asymmetry due to the sodium ion incorporation within the PHI lattice, directing from sodium (Na+) to the adjacent nitrogen. Piezoresponse force microscopy (PFM) measurements, X-ray absorption near-edge structure (XANES) analysis, and density functional theory (DFT) calculations collectively confirm the formation of localized dipoles and the resulting internal electric field, establishing a direct relationship between ionic polarization and charge separation. When applied in photocatalytic energy conversion, this PHI-Na exhibits the H2O2 production rate of 46.6 mmol g(-1) h(-1) and 59.5 mmol g(-1) h(-1) under visible light and AM1.5G, respectively, and the accumulated H2O2 concentration within 4 h reaches up to similar to 17 mM, which stands out among other organic semiconductor counterparts. This work reveals a structure-defined route to introduce ionic polarization in carbon nitride crystal and provides new insights into designing efficient metal-free photocatalysts for solar energy conversion.
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Chen, Mingjun; Ho, Yi Wei; Lai, MingRui; Chen, Yuan; Sun, Xingjian; Kwok, Yuk Lam; Taniguchi, Takashi; Watanabe, Kenji; Koperski, Maciej; Quek, Su Ying; Eda, Goki Excitonic Shift Current in Monolayer MoS2 ACS NANO, 20 (23), pp. 16665-16674, 2026, DOI: 10.1021/acsnano.6c01332. @article{WOS:001783592600001, title = {Excitonic Shift Current in Monolayer MoS2}, author = {Mingjun Chen and Yi Wei Ho and MingRui Lai and Yuan Chen and Xingjian Sun and Yuk Lam Kwok and Takashi Taniguchi and Kenji Watanabe and Maciej Koperski and Su Ying Quek and Goki Eda}, doi = {10.1021/acsnano.6c01332}, times_cited = {0}, issn = {1936-0851}, year = {2026}, date = {2026-06-01}, journal = {ACS NANO}, volume = {20}, number = {23}, pages = {16665-16674}, publisher = {AMER CHEMICAL SOC}, address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA}, abstract = {In excitonic systems, where the relative motion of electrons and holes is constrained by Coulomb interaction, how exciton effects influence the magnitude of shift current-a phase-coherent shift of photoexcited Bloch electrons and holes found in noncentrosymmetric materials-has been a subject of ongoing theoretical interest. Here, we report observation of exciton-enhanced shift current in uniaxially strained monolayer MoS2. We obtain energy-dependent shift current conductivity tensor elements by measuring polarization-resolved photocurrent spectrum in multiterminal configurations, revealing a series of features that are absent in the linear optical spectra. We show that these features can be attributed to higher-order excitons and that their large shift vector plays an important role in their observation. We further demonstrate that electrostatic gating can modulate the shift current by two orders of magnitude in a nonmonotonous manner, revealing the interplay between free carrier conductivity and exciton oscillator strength.}, keywords = {}, pubstate = {published}, tppubtype = {article} } In excitonic systems, where the relative motion of electrons and holes is constrained by Coulomb interaction, how exciton effects influence the magnitude of shift current-a phase-coherent shift of photoexcited Bloch electrons and holes found in noncentrosymmetric materials-has been a subject of ongoing theoretical interest. Here, we report observation of exciton-enhanced shift current in uniaxially strained monolayer MoS2. We obtain energy-dependent shift current conductivity tensor elements by measuring polarization-resolved photocurrent spectrum in multiterminal configurations, revealing a series of features that are absent in the linear optical spectra. We show that these features can be attributed to higher-order excitons and that their large shift vector plays an important role in their observation. We further demonstrate that electrostatic gating can modulate the shift current by two orders of magnitude in a nonmonotonous manner, revealing the interplay between free carrier conductivity and exciton oscillator strength.
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Jana, Dipankar; Soll, Aljoscha; Sofer, Zdenek; Orlita, Milan; Faugeras, Clement; Koperski, Maciej; Potemski, Marek Spin-Flip Optical Excitations in van der Waals Antiferromagnet CrPS4 NANO LETTERS, 2026, DOI: 10.1021/acs.nanolett.6c01101. @article{WOS:001792718100001, title = {Spin-Flip Optical Excitations in van der Waals Antiferromagnet CrPS4}, author = {Dipankar Jana and Aljoscha Soll and Zdenek Sofer and Milan Orlita and Clement Faugeras and Maciej Koperski and Marek Potemski}, doi = {10.1021/acs.nanolett.6c01101}, times_cited = {0}, issn = {1530-6984}, year = {2026}, date = {2026-06-01}, journal = {NANO LETTERS}, publisher = {AMER CHEMICAL SOC}, address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA}, abstract = {We investigate the near-infrared optical response of the semiconducting van der Waals antiferromagnet CrPS4 and identify previously unreported spin-entangled optical resonances. The strong and anisotropic magnetic-field dependence of these resonances reflects the underlying magnetic order and confirms the biaxial antiferromagnetic nature of CrPS4. From the magnetic field evolution of the optical transition, we extract key magnetic parameters, including the spin-flop ( approximate to 0.9 T) and spin-saturation ( approximate to 8 T) fields. These results demonstrate a potential pathway for all-optical probing of spin states in van der Waals antiferromagnets, with relevance for spin-sensitive optoelectronic and magneto-optical devices.}, keywords = {}, pubstate = {published}, tppubtype = {article} } We investigate the near-infrared optical response of the semiconducting van der Waals antiferromagnet CrPS4 and identify previously unreported spin-entangled optical resonances. The strong and anisotropic magnetic-field dependence of these resonances reflects the underlying magnetic order and confirms the biaxial antiferromagnetic nature of CrPS4. From the magnetic field evolution of the optical transition, we extract key magnetic parameters, including the spin-flop ( approximate to 0.9 T) and spin-saturation ( approximate to 8 T) fields. These results demonstrate a potential pathway for all-optical probing of spin states in van der Waals antiferromagnets, with relevance for spin-sensitive optoelectronic and magneto-optical devices.
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Babkova, Julia S; Zelepukin, Ivan V; Shevchenko, Konstantin G; Tikhonowski, Gleb V; Gorelik, Lyubov V; Popov, Anton A; Sogomonyan, Anna S; Kapitannikova, Alina Yu.; Kazantsev, Ivan S; Dyubo, Dmitry V; Panova, Daria A; Tselikov, Daniil I; Minnekhanov, Anton A; Mirkasymov, Aziz B; Ermolaev, Georgy A; Syuy, Alexander V; Tselikov, Gleb I; Arsenin, Aleksey V; Kabashin, Andrei V; Novoselov, Kostya S; Deyev, Sergey M; Volkov, Valentyn S Shaping Ti3C2 MXene Nanospheres for Precision Near-Infrared Photothermal Therapy ADVANCED FUNCTIONAL MATERIALS, 36 (46), 2026, DOI: 10.1002/adfm.202524090. @article{WOS:001746323300001, title = {Shaping Ti3C2 MXene Nanospheres for Precision Near-Infrared Photothermal Therapy}, author = {Julia S Babkova and Ivan V Zelepukin and Konstantin G Shevchenko and Gleb V Tikhonowski and Lyubov V Gorelik and Anton A Popov and Anna S Sogomonyan and Alina Yu. Kapitannikova and Ivan S Kazantsev and Dmitry V Dyubo and Daria A Panova and Daniil I Tselikov and Anton A Minnekhanov and Aziz B Mirkasymov and Georgy A Ermolaev and Alexander V Syuy and Gleb I Tselikov and Aleksey V Arsenin and Andrei V Kabashin and Kostya S Novoselov and Sergey M Deyev and Valentyn S Volkov}, doi = {10.1002/adfm.202524090}, times_cited = {0}, issn = {1616-301X}, year = {2026}, date = {2026-06-01}, journal = {ADVANCED FUNCTIONAL MATERIALS}, volume = {36}, number = {46}, publisher = {WILEY-V C H VERLAG GMBH}, address = {POSTFACH 101161, 69451 WEINHEIM, GERMANY}, abstract = {2D materials such as MXenes are recognised for their therapeutic potential in biomedicine. However, morphology of nanomaterials determines their interactions with biological systems, and uneven shape of MXenes impose critical limitations on their clinical applicability. Here, we introduce spherical MXenes as a novel class of biocompatible nanomaterials, and demonstrate applicability of Ti3C2 nanospheres for photothermal therapy (PTT) of breast cancer. The Ti3C2 nanospheres were prepared by femtosecond laser fragmentation of MXene powder and retained the crystallinity and internal optical properties of the parent material. The nanoparticles have characteristic light absorption both in the NIR-I and NIR-II windows, with a superior photothermal conversion efficiency of 68% and 63% under 808-nm and 1064-nm laser irradiation, respectively. The Ti3C2 nanospheres did not induce photodynamic effects and demonstrated negligible toxicity in vitro in three different cell lines and in vivo in healthy mice. Under laser irradiation, the Ti3C2 nanospheres exhibit potent photothermal cytotoxicity as shown in cell monolayers, spheroids and a 4T1 murine tumor model. When employed for PTT, they significantly inhibit tumor growth and 1.4-fold prolong median survival of animals. These findings demonstrate biocompatibility and therapeutic potential of spherical MXenes for cancer management.}, keywords = {}, pubstate = {published}, tppubtype = {article} } 2D materials such as MXenes are recognised for their therapeutic potential in biomedicine. However, morphology of nanomaterials determines their interactions with biological systems, and uneven shape of MXenes impose critical limitations on their clinical applicability. Here, we introduce spherical MXenes as a novel class of biocompatible nanomaterials, and demonstrate applicability of Ti3C2 nanospheres for photothermal therapy (PTT) of breast cancer. The Ti3C2 nanospheres were prepared by femtosecond laser fragmentation of MXene powder and retained the crystallinity and internal optical properties of the parent material. The nanoparticles have characteristic light absorption both in the NIR-I and NIR-II windows, with a superior photothermal conversion efficiency of 68% and 63% under 808-nm and 1064-nm laser irradiation, respectively. The Ti3C2 nanospheres did not induce photodynamic effects and demonstrated negligible toxicity in vitro in three different cell lines and in vivo in healthy mice. Under laser irradiation, the Ti3C2 nanospheres exhibit potent photothermal cytotoxicity as shown in cell monolayers, spheroids and a 4T1 murine tumor model. When employed for PTT, they significantly inhibit tumor growth and 1.4-fold prolong median survival of animals. These findings demonstrate biocompatibility and therapeutic potential of spherical MXenes for cancer management.
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Kumar, Pankaj; Bosman, Michel; Lavrentev, Nikolai; Zheng, He; Peng, Ding; Novoselov, Kostya S; Latychevskaia, Tatiana Untangling 3D Atomic Reconstruction in Twisted Bilayer 2D Crystals via Dark Field Transmission Electron Microscopy NANO LETTERS, 26 (21), pp. 6965-6971, 2026, DOI: 10.1021/acs.nanolett.6c00944. @article{WOS:001770235200001, title = {Untangling 3D Atomic Reconstruction in Twisted Bilayer 2D Crystals via Dark Field Transmission Electron Microscopy}, author = {Pankaj Kumar and Michel Bosman and Nikolai Lavrentev and He Zheng and Ding Peng and Kostya S Novoselov and Tatiana Latychevskaia}, doi = {10.1021/acs.nanolett.6c00944}, times_cited = {0}, issn = {1530-6984}, year = {2026}, date = {2026-06-01}, journal = {NANO LETTERS}, volume = {26}, number = {21}, pages = {6965-6971}, publisher = {AMER CHEMICAL SOC}, address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA}, abstract = {Reconstruction of the atomic crystal structure in twisted 2D materials has been demonstrated to be responsible for multiple exciting phenomena in van der Waals heterostructures, from the appearance of flat bands in twisted bilayer graphene to Wigner crystallization in transition metal dichalcogenides (TMDs). However, there are still neither experimental methods for accessing the 3D atomic distributions nor models that describe the exact atomic shifts in such reconstructed structures, which significantly impedes the development of the field. Dark field (DF) transmission electron microscopy (TEM) has been conventionally employed to visualize the local in-plane atomic displacements. Here we expand this method to obtain a full description of the reconstructed atomic systems and demonstrate the quantitative relations between the local stacking and the intensity in the DF image. We show how local 3D atomic displacements and the interlayer distance can be extracted from a DF image.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Reconstruction of the atomic crystal structure in twisted 2D materials has been demonstrated to be responsible for multiple exciting phenomena in van der Waals heterostructures, from the appearance of flat bands in twisted bilayer graphene to Wigner crystallization in transition metal dichalcogenides (TMDs). However, there are still neither experimental methods for accessing the 3D atomic distributions nor models that describe the exact atomic shifts in such reconstructed structures, which significantly impedes the development of the field. Dark field (DF) transmission electron microscopy (TEM) has been conventionally employed to visualize the local in-plane atomic displacements. Here we expand this method to obtain a full description of the reconstructed atomic systems and demonstrate the quantitative relations between the local stacking and the intensity in the DF image. We show how local 3D atomic displacements and the interlayer distance can be extracted from a DF image.
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Zhou, Xiangyu; Gayduchenko, Igor; Kudriashov, Andrei; Shein, Kirill; Kuksov, Anton; Elesin, Leonid; Kravtsov, Mikhail; Shilov, Artur; Popova, Olga; Jana, Subhajit; Novoselov, Kostya S; Taniguchi, Takashi; Watanabe, Kenji; Goltsman, Gregory; Bandurin, Denis A Gate-Tunable Photoresponse of Graphene Josephson Junctions at Terahertz Frequencies NANO LETTERS, 26 (22), pp. 7435-7442, 2026, DOI: 10.1021/acs.nanolett.6c01483. @article{WOS:001776257400001, title = {Gate-Tunable Photoresponse of Graphene Josephson Junctions at Terahertz Frequencies}, author = {Xiangyu Zhou and Igor Gayduchenko and Andrei Kudriashov and Kirill Shein and Anton Kuksov and Leonid Elesin and Mikhail Kravtsov and Artur Shilov and Olga Popova and Subhajit Jana and Kostya S Novoselov and Takashi Taniguchi and Kenji Watanabe and Gregory Goltsman and Denis A Bandurin}, doi = {10.1021/acs.nanolett.6c01483}, times_cited = {0}, issn = {1530-6984}, year = {2026}, date = {2026-06-01}, journal = {NANO LETTERS}, volume = {26}, number = {22}, pages = {7435-7442}, publisher = {AMER CHEMICAL SOC}, address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA}, abstract = {Graphene Josephson junctions (JJs) are promising platforms for broadband quantum sensing because graphene combines frequency-independent absorption, ultralow electronic heat capacity, and weak electron-phonon coupling. While previous studies focused on microwave and infrared regimes, the terahertz (THz) range-where highly sensitive quantum detectors remain scarce-has largely remained unexplored. Here, we demonstrate a gate-tunable THz photoresponse in graphene JJs. Low-intensity THz illumination strongly suppresses the critical current, generating a pronounced photovoltage under current bias. From photovoltage measurements and independent electron thermometry, we extract a responsivity of 88 kV W-1 and a noise-equivalent power of 45 aW Hz(-1/2) at 1.7 K. In addition, the hysteretic regime that persists up to 0.9 K suggests a possible route toward single-photon THz detection above millikelvin temperatures. Our results establish graphene JJs as promising candidates for cryogenic THz quantum sensing.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Graphene Josephson junctions (JJs) are promising platforms for broadband quantum sensing because graphene combines frequency-independent absorption, ultralow electronic heat capacity, and weak electron-phonon coupling. While previous studies focused on microwave and infrared regimes, the terahertz (THz) range-where highly sensitive quantum detectors remain scarce-has largely remained unexplored. Here, we demonstrate a gate-tunable THz photoresponse in graphene JJs. Low-intensity THz illumination strongly suppresses the critical current, generating a pronounced photovoltage under current bias. From photovoltage measurements and independent electron thermometry, we extract a responsivity of 88 kV W-1 and a noise-equivalent power of 45 aW Hz(-1/2) at 1.7 K. In addition, the hysteretic regime that persists up to 0.9 K suggests a possible route toward single-photon THz detection above millikelvin temperatures. Our results establish graphene JJs as promising candidates for cryogenic THz quantum sensing.
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Litvinov, Dmitrii; Gavriliuc, Virgil; Grzeszczyk, Magdalena; Vaklinova, Kristina; Watanabe, Kenji; Taniguchi, Takashi; Novoselov, Kostya S; Koperski, Maciej Surface defects in carbon-doped hexagonal boron nitride for negative-contrast direct laser writing 2D MATERIALS, 13 (2), 2026, DOI: 10.1088/2053-1583/ae463c. @article{WOS:001701838600001, title = {Surface defects in carbon-doped hexagonal boron nitride for negative-contrast direct laser writing}, author = {Dmitrii Litvinov and Virgil Gavriliuc and Magdalena Grzeszczyk and Kristina Vaklinova and Kenji Watanabe and Takashi Taniguchi and Kostya S Novoselov and Maciej Koperski}, doi = {10.1088/2053-1583/ae463c}, times_cited = {0}, issn = {2053-1583}, year = {2026}, date = {2026-06-01}, journal = {2D MATERIALS}, volume = {13}, number = {2}, publisher = {IOP Publishing Ltd}, address = {No.2 The Distillery, Glassfields, Avon Street, Bristol, ENGLAND}, abstract = {Radiative defects in hexagonal boron nitride (hBN) are active in a broad spectral range from deep ultraviolet to near-infrared wavelengths. Representatives of these defects act as bright single photon sources, spin-1 systems, and multiproperty atomic-scale sensors. They are predominantly investigated in bulk hBN films, where defects are decoupled from surface and interfacial effects. Here, we demonstrate a novel class of surface defects optically active in the green/yellow visible spectral range, which exhibit photophysical properties distinct from their bulk counterparts. High-power resonant laser illumination quenched the emission from the ensemble of such defects, which was attributed to a light-driven structural reconfiguration. The quenched defects were found to recover their emissive capabilities via a thermal cycling process, revealing an activation energy of 24.5 meV for the structural transition. Alternatively, permanent quenching of the defects was triggered by surface chemistry, involving lithiation-enabled attachment of functional groups. These mechanisms were utilized to realize negative-contrast direct laser writing, designing arbitrary geometric emissive patterns on demand in a microscopic configuration. The surface-active radiative centers in hBN appear particularly attractive for exploring environmental sensitivity, surface science, and coupling to photonic structures or electronic devices by taking unique advantage of the two-dimensional characteristics of the host lattice.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Radiative defects in hexagonal boron nitride (hBN) are active in a broad spectral range from deep ultraviolet to near-infrared wavelengths. Representatives of these defects act as bright single photon sources, spin-1 systems, and multiproperty atomic-scale sensors. They are predominantly investigated in bulk hBN films, where defects are decoupled from surface and interfacial effects. Here, we demonstrate a novel class of surface defects optically active in the green/yellow visible spectral range, which exhibit photophysical properties distinct from their bulk counterparts. High-power resonant laser illumination quenched the emission from the ensemble of such defects, which was attributed to a light-driven structural reconfiguration. The quenched defects were found to recover their emissive capabilities via a thermal cycling process, revealing an activation energy of 24.5 meV for the structural transition. Alternatively, permanent quenching of the defects was triggered by surface chemistry, involving lithiation-enabled attachment of functional groups. These mechanisms were utilized to realize negative-contrast direct laser writing, designing arbitrary geometric emissive patterns on demand in a microscopic configuration. The surface-active radiative centers in hBN appear particularly attractive for exploring environmental sensitivity, surface science, and coupling to photonic structures or electronic devices by taking unique advantage of the two-dimensional characteristics of the host lattice.
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