2026
|
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. Abstract | BibTeX | Endnote @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. - FNClarivate Analytics Web of Science
- VR1.0
- PTJ
- AFYa Deng
Zi-Yi Han
Yao Wu
Kongyang Yi
Ya-Ning Ren
Dundong Yuan
Chao Zhu
Lin He
Zheng Liu
- TIControlled chemical vapor deposition for synthesis of emerging Mo(W)Te2
systems - SOMATERIALS TODAY
- DTArticle
- ABThe 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. - Z90
- PUELSEVIER SCI LTD
- PA125 London Wall, London, ENGLAND
- SN1369-7021
- VL98
- DI10.1016/j.mattod.2026.103390
- UTWOS:001793998200001
- ER
- EF
|
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. Abstract | BibTeX | Endnote @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. - FNClarivate Analytics Web of Science
- VR1.0
- PTJ
- AFYahao Li
Yuqing Wang
Mei Zheng
Chenguang Zhang
Mingyu Ma
Kedar Hippalgaonkar
Shuzhou Li
Meng Wu
Zheng Liu
Wenping Si
- TIAtomic-level ionic polarization in poly(heptazine imides) towards
enhanced photocatalytic H2O2 production - SOCHEMICAL ENGINEERING JOURNAL
- DTArticle
- ABPolarization 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. - Z90
- PUELSEVIER SCIENCE SA
- PAPO BOX 564, 1001 LAUSANNE, SWITZERLAND
- SN1385-8947
- VL538
- DI10.1016/j.cej.2026.176636
- UTWOS:001761156300001
- ER
- EF
|
Chen, Yingjun; Tang, Cindy G; Zhou, Zhongliang; Li, Ran; Liu, Zheng; Li, Ting; Leong, Wei Lin High-Performance All-Printed Vertical Step Organic Electrochemical
Transistors for Flexible Bioelectronics and Logic Circuit Integration ACS APPLIED ELECTRONIC MATERIALS, 8 (5), pp. 2033-2044, 2026, DOI: 10.1021/acsaelm.5c02385. Abstract | BibTeX | Endnote @article{WOS:001698155700001,
title = {High-Performance All-Printed Vertical Step Organic Electrochemical
Transistors for Flexible Bioelectronics and Logic Circuit Integration},
author = {Yingjun Chen and Cindy G Tang and Zhongliang Zhou and Ran Li and Zheng Liu and Ting Li and Wei Lin Leong},
doi = {10.1021/acsaelm.5c02385},
times_cited = {1},
year = {2026},
date = {2026-03-01},
journal = {ACS APPLIED ELECTRONIC MATERIALS},
volume = {8},
number = {5},
pages = {2033-2044},
publisher = {AMER CHEMICAL SOC},
address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA},
abstract = {Printed organic electrochemical transistors (OECTs) are promising for
flexible bioelectronics due to their low operating voltage, high
transconductance, and mechanical flexibility, which enable seamless
integration with soft biological tissues. However, printed
planar-channel OECTs typically suffer from a slow transient response,
mainly owing to the printing resolution, which restricts their use in
high-speed logic circuits and high-throughput sensing. This work
presents all screen-printed vertical step OECTs (VS-OECTs) on a flexible
substrate, using poly(3,4-ethylenedioxythiophene):polystyrene sulfonate
(PEDOT:PSS) as a channel material, poly(sodium 4-styrenesulfonate)
(PSSNa)-based conductive hydrogel as an electrolyte, and Ag/AgCl paste
as a top gate. In this vertical design, the source and drain electrodes
are separated by an insulating layer, forming a vertical step structure.
This vertical structure offers advantages over conventional
planar-channel structures, where higher source-drain current I-ds
(similar to 0.45 mA), higher transconductance g(m) (similar to 1 mS),
higher ON/OFF ratio (2.6 & times; 10(4)), faster switching time (1.27
ms to turn on and 8.4 ms to turn off), and better pulsing stability
(>96% after 1000 gate pulse) can be attained. Bending tests and various
substrate printing validate the flexibility and universal printability
of the vertical structures. Additionally, a unipolar inverter based on
printed VS-OECTs operates at a high frequency (similar to 100 Hz), and
effective signal amplification for electrocardiogram (ECG) and wrist
artery pulse monitoring has been demonstrated, highlighting the
potential of printed VS-OECTs for personal health monitoring. These
findings propose a promising approach for producing large-area and
high-performance printed OECTs, paving the way for the development of
all-printed transistors with fast response times for various
applications.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Printed organic electrochemical transistors (OECTs) are promising for
flexible bioelectronics due to their low operating voltage, high
transconductance, and mechanical flexibility, which enable seamless
integration with soft biological tissues. However, printed
planar-channel OECTs typically suffer from a slow transient response,
mainly owing to the printing resolution, which restricts their use in
high-speed logic circuits and high-throughput sensing. This work
presents all screen-printed vertical step OECTs (VS-OECTs) on a flexible
substrate, using poly(3,4-ethylenedioxythiophene):polystyrene sulfonate
(PEDOT:PSS) as a channel material, poly(sodium 4-styrenesulfonate)
(PSSNa)-based conductive hydrogel as an electrolyte, and Ag/AgCl paste
as a top gate. In this vertical design, the source and drain electrodes
are separated by an insulating layer, forming a vertical step structure.
This vertical structure offers advantages over conventional
planar-channel structures, where higher source-drain current I-ds
(similar to 0.45 mA), higher transconductance g(m) (similar to 1 mS),
higher ON/OFF ratio (2.6 & times; 10(4)), faster switching time (1.27
ms to turn on and 8.4 ms to turn off), and better pulsing stability
(>96% after 1000 gate pulse) can be attained. Bending tests and various
substrate printing validate the flexibility and universal printability
of the vertical structures. Additionally, a unipolar inverter based on
printed VS-OECTs operates at a high frequency (similar to 100 Hz), and
effective signal amplification for electrocardiogram (ECG) and wrist
artery pulse monitoring has been demonstrated, highlighting the
potential of printed VS-OECTs for personal health monitoring. These
findings propose a promising approach for producing large-area and
high-performance printed OECTs, paving the way for the development of
all-printed transistors with fast response times for various
applications. - FNClarivate Analytics Web of Science
- VR1.0
- PTJ
- AFYingjun Chen
Cindy G Tang
Zhongliang Zhou
Ran Li
Zheng Liu
Ting Li
Wei Lin Leong
- TIHigh-Performance All-Printed Vertical Step Organic Electrochemical
Transistors for Flexible Bioelectronics and Logic Circuit Integration - SOACS APPLIED ELECTRONIC MATERIALS
- DTArticle
- ABPrinted organic electrochemical transistors (OECTs) are promising for
flexible bioelectronics due to their low operating voltage, high
transconductance, and mechanical flexibility, which enable seamless
integration with soft biological tissues. However, printed
planar-channel OECTs typically suffer from a slow transient response,
mainly owing to the printing resolution, which restricts their use in
high-speed logic circuits and high-throughput sensing. This work
presents all screen-printed vertical step OECTs (VS-OECTs) on a flexible
substrate, using poly(3,4-ethylenedioxythiophene):polystyrene sulfonate
(PEDOT:PSS) as a channel material, poly(sodium 4-styrenesulfonate)
(PSSNa)-based conductive hydrogel as an electrolyte, and Ag/AgCl paste
as a top gate. In this vertical design, the source and drain electrodes
are separated by an insulating layer, forming a vertical step structure.
This vertical structure offers advantages over conventional
planar-channel structures, where higher source-drain current I-ds
(similar to 0.45 mA), higher transconductance g(m) (similar to 1 mS),
higher ON/OFF ratio (2.6 & times; 10(4)), faster switching time (1.27
ms to turn on and 8.4 ms to turn off), and better pulsing stability
(>96% after 1000 gate pulse) can be attained. Bending tests and various
substrate printing validate the flexibility and universal printability
of the vertical structures. Additionally, a unipolar inverter based on
printed VS-OECTs operates at a high frequency (similar to 100 Hz), and
effective signal amplification for electrocardiogram (ECG) and wrist
artery pulse monitoring has been demonstrated, highlighting the
potential of printed VS-OECTs for personal health monitoring. These
findings propose a promising approach for producing large-area and
high-performance printed OECTs, paving the way for the development of
all-printed transistors with fast response times for various
applications. - Z91
- PUAMER CHEMICAL SOC
- PA1155 16TH ST, NW, WASHINGTON, DC 20036 USA
- VL8
- BP2033
- EP2044
- DI10.1021/acsaelm.5c02385
- UTWOS:001698155700001
- ER
- EF
|
Ma, Mingyu; Lee, Jinn-Kye; Wu, Shuyang; Yu, Zhen; Wang, Yuqing; Zhou, Xin; Liu, Yanting; Chan, Jiaxin; Shi, Jiayu; Liu, Liren; Zhang, Zhengyang; Liu, Zheng Identical-Location Single-Molecule Imaging Reveals Cocatalyst-Induced
Enhancement in Photocatalytic Activity ADVANCED FUNCTIONAL MATERIALS, 36 (21), 2026, DOI: 10.1002/adfm.202510387. Abstract | BibTeX | Endnote @article{WOS:001599608200001,
title = {Identical-Location Single-Molecule Imaging Reveals Cocatalyst-Induced
Enhancement in Photocatalytic Activity},
author = {Mingyu Ma and Jinn-Kye Lee and Shuyang Wu and Zhen Yu and Yuqing Wang and Xin Zhou and Yanting Liu and Jiaxin Chan and Jiayu Shi and Liren Liu and Zhengyang Zhang and Zheng Liu},
doi = {10.1002/adfm.202510387},
times_cited = {1},
issn = {1616-301X},
year = {2026},
date = {2026-03-01},
journal = {ADVANCED FUNCTIONAL MATERIALS},
volume = {36},
number = {21},
publisher = {WILEY-V C H VERLAG GMBH},
address = {POSTFACH 101161, 69451 WEINHEIM, GERMANY},
abstract = {Incorporating cocatalysts into photocatalytic systems has been widely
recognized as an effective way to accelerate catalytic reactions and
boost catalytic efficiency. However, directly visualizing the
cocatalytic effect in real-time with nanometric precision remains a
significant challenge. This study presents an advanced single-molecule
imaging technique, IL-SMLM (identical-location single-molecule
localization microscopy), to resolve and quantify the activity
enhancements induced by Pt cocatalysts on bismuth oxybromide (BiOBr)
photocatalysts with nanometric resolution. The findings demonstrate that
Pt cocatalysts significantly enhance the photoreduction ability of both
the basal plane and edges in BiOBr. Remarkably, the enhancement factor
at the edges (approximate to 4668) is 12-fold higher than that of the
basal plane. This preferential enhancement originates from structural
differences, with the presence of compressive strain at edges
facilitating more efficient charge separation and electron transfer in
BiOBr; further, the preferential charge separation of the edge will be
amplified while introducing a uniformly distributed Pt cocatalyst. The
study highlights IL-SMLM as a powerful tool for probing complex
cocatalytic phenomena at the single-molecule level and provides valuable
insights for the rational design of high-performance photocatalytic
systems.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Incorporating cocatalysts into photocatalytic systems has been widely
recognized as an effective way to accelerate catalytic reactions and
boost catalytic efficiency. However, directly visualizing the
cocatalytic effect in real-time with nanometric precision remains a
significant challenge. This study presents an advanced single-molecule
imaging technique, IL-SMLM (identical-location single-molecule
localization microscopy), to resolve and quantify the activity
enhancements induced by Pt cocatalysts on bismuth oxybromide (BiOBr)
photocatalysts with nanometric resolution. The findings demonstrate that
Pt cocatalysts significantly enhance the photoreduction ability of both
the basal plane and edges in BiOBr. Remarkably, the enhancement factor
at the edges (approximate to 4668) is 12-fold higher than that of the
basal plane. This preferential enhancement originates from structural
differences, with the presence of compressive strain at edges
facilitating more efficient charge separation and electron transfer in
BiOBr; further, the preferential charge separation of the edge will be
amplified while introducing a uniformly distributed Pt cocatalyst. The
study highlights IL-SMLM as a powerful tool for probing complex
cocatalytic phenomena at the single-molecule level and provides valuable
insights for the rational design of high-performance photocatalytic
systems. - FNClarivate Analytics Web of Science
- VR1.0
- PTJ
- AFMingyu Ma
Jinn-Kye Lee
Shuyang Wu
Zhen Yu
Yuqing Wang
Xin Zhou
Yanting Liu
Jiaxin Chan
Jiayu Shi
Liren Liu
Zhengyang Zhang
Zheng Liu
- TIIdentical-Location Single-Molecule Imaging Reveals Cocatalyst-Induced
Enhancement in Photocatalytic Activity - SOADVANCED FUNCTIONAL MATERIALS
- DTArticle
- ABIncorporating cocatalysts into photocatalytic systems has been widely
recognized as an effective way to accelerate catalytic reactions and
boost catalytic efficiency. However, directly visualizing the
cocatalytic effect in real-time with nanometric precision remains a
significant challenge. This study presents an advanced single-molecule
imaging technique, IL-SMLM (identical-location single-molecule
localization microscopy), to resolve and quantify the activity
enhancements induced by Pt cocatalysts on bismuth oxybromide (BiOBr)
photocatalysts with nanometric resolution. The findings demonstrate that
Pt cocatalysts significantly enhance the photoreduction ability of both
the basal plane and edges in BiOBr. Remarkably, the enhancement factor
at the edges (approximate to 4668) is 12-fold higher than that of the
basal plane. This preferential enhancement originates from structural
differences, with the presence of compressive strain at edges
facilitating more efficient charge separation and electron transfer in
BiOBr; further, the preferential charge separation of the edge will be
amplified while introducing a uniformly distributed Pt cocatalyst. The
study highlights IL-SMLM as a powerful tool for probing complex
cocatalytic phenomena at the single-molecule level and provides valuable
insights for the rational design of high-performance photocatalytic
systems. - Z91
- PUWILEY-V C H VERLAG GMBH
- PAPOSTFACH 101161, 69451 WEINHEIM, GERMANY
- SN1616-301X
- VL36
- DI10.1002/adfm.202510387
- UTWOS:001599608200001
- ER
- EF
|
2025
|
Zhai, Qingwei; Pramanik, Nikhil; Duan, Ruihuan; Huang, Sunchao; Liu, Zheng; Wong, Liang Jie Enhanced tunable X-rays from bulk crystals driven by table-top free
electron energies NATURE COMMUNICATIONS, 16 (1), 2025, DOI: 10.1038/s41467-025-66063-6. Abstract | BibTeX | Endnote @article{WOS:001643414200003,
title = {Enhanced tunable X-rays from bulk crystals driven by table-top free
electron energies},
author = {Qingwei Zhai and Nikhil Pramanik and Ruihuan Duan and Sunchao Huang and Zheng Liu and Liang Jie Wong},
doi = {10.1038/s41467-025-66063-6},
times_cited = {0},
year = {2025},
date = {2025-12-01},
journal = {NATURE COMMUNICATIONS},
volume = {16},
number = {1},
publisher = {NATURE PORTFOLIO},
address = {HEIDELBERGER PLATZ 3, BERLIN, 14197, GERMANY},
abstract = {Free-electron-driven crystalline materials have emerged as a promising
platform for tunable, table-top X-ray generation in industrial, medical
imaging applications, and fundamental research. It is commonly believed,
however, that the use of bulk crystals is not feasible under the weakly
relativistic energies necessitated by table-top electron sources. This
belief is fueled by the perception that electron scattering inside bulk
crystals produces substantial bremsstrahlung background which overwhelms
the tunable, narrowband X-ray peaks. In this study, we overturn this
belief by introducing a parameter that distinguishes a regime where
tunable X-rays substantially dominate bremsstrahlung in bulk materials.
We show that this regime is most readily accessible with van der Waals
crystals, revealing an unprecedented property of van der Waals crystals
in the X-ray regime. We experimentally demonstrate a tenfold intensity
enhancement through the use of bulk van der Waals crystals, in good
agreement with our theoretical predictions. The use of bulk crystals is
also advantageous in requiring less labor-intensive material preparation
and being less vulnerable to damage compared to thin films. Our findings
pave the way to more efficient and more accessible table-top, tunable,
narrowband X-ray sources for safer and more sustainable X-ray imaging in
industries including semiconductors and healthcare.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Free-electron-driven crystalline materials have emerged as a promising
platform for tunable, table-top X-ray generation in industrial, medical
imaging applications, and fundamental research. It is commonly believed,
however, that the use of bulk crystals is not feasible under the weakly
relativistic energies necessitated by table-top electron sources. This
belief is fueled by the perception that electron scattering inside bulk
crystals produces substantial bremsstrahlung background which overwhelms
the tunable, narrowband X-ray peaks. In this study, we overturn this
belief by introducing a parameter that distinguishes a regime where
tunable X-rays substantially dominate bremsstrahlung in bulk materials.
We show that this regime is most readily accessible with van der Waals
crystals, revealing an unprecedented property of van der Waals crystals
in the X-ray regime. We experimentally demonstrate a tenfold intensity
enhancement through the use of bulk van der Waals crystals, in good
agreement with our theoretical predictions. The use of bulk crystals is
also advantageous in requiring less labor-intensive material preparation
and being less vulnerable to damage compared to thin films. Our findings
pave the way to more efficient and more accessible table-top, tunable,
narrowband X-ray sources for safer and more sustainable X-ray imaging in
industries including semiconductors and healthcare. - FNClarivate Analytics Web of Science
- VR1.0
- PTJ
- AFQingwei Zhai
Nikhil Pramanik
Ruihuan Duan
Sunchao Huang
Zheng Liu
Liang Jie Wong
- TIEnhanced tunable X-rays from bulk crystals driven by table-top free
electron energies - SONATURE COMMUNICATIONS
- DTArticle
- ABFree-electron-driven crystalline materials have emerged as a promising
platform for tunable, table-top X-ray generation in industrial, medical
imaging applications, and fundamental research. It is commonly believed,
however, that the use of bulk crystals is not feasible under the weakly
relativistic energies necessitated by table-top electron sources. This
belief is fueled by the perception that electron scattering inside bulk
crystals produces substantial bremsstrahlung background which overwhelms
the tunable, narrowband X-ray peaks. In this study, we overturn this
belief by introducing a parameter that distinguishes a regime where
tunable X-rays substantially dominate bremsstrahlung in bulk materials.
We show that this regime is most readily accessible with van der Waals
crystals, revealing an unprecedented property of van der Waals crystals
in the X-ray regime. We experimentally demonstrate a tenfold intensity
enhancement through the use of bulk van der Waals crystals, in good
agreement with our theoretical predictions. The use of bulk crystals is
also advantageous in requiring less labor-intensive material preparation
and being less vulnerable to damage compared to thin films. Our findings
pave the way to more efficient and more accessible table-top, tunable,
narrowband X-ray sources for safer and more sustainable X-ray imaging in
industries including semiconductors and healthcare. - Z90
- PUNATURE PORTFOLIO
- PAHEIDELBERGER PLATZ 3, BERLIN, 14197, GERMANY
- VL16
- DI10.1038/s41467-025-66063-6
- UTWOS:001643414200003
- ER
- EF
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