Article
Chemistry, Multidisciplinary
Ping Wang, Woncheol Lee, Joseph P. Corbett, William H. Koll, Nguyen M. Vu, David Arto Laleyan, Qiannan Wen, Yuanpeng Wu, Ayush Pandey, Jiseok Gim, Ding Wang, Diana Y. Qiu, Robert Hovden, Mackillo Kira, John T. Heron, Jay A. Gupta, Emmanouil Kioupakis, Zetian Mi
Summary: This study proposes a growth process mediated by an hBN/G interface for the controlled synthesis of high-quality monolayer hBN. The scalable epitaxy of unidirectional monolayer hBN on graphene aligned to the underlying graphene lattice is achieved. Additionally, it is discovered that monolayer hBN exhibits deep-ultraviolet emission with a giant renormalized direct bandgap on graphene.
ADVANCED MATERIALS
(2022)
Article
Multidisciplinary Sciences
Y. Dong, L. Xiong, I. Y. Phinney, Z. Sun, R. Jing, A. S. McLeod, S. Zhang, S. Liu, F. L. Ruta, H. Gao, Z. Dong, R. Pan, J. H. Edgar, P. Jarillo-Herrero, L. S. Levitov, A. J. Millis, M. M. Fogler, D. A. Bandurin, D. N. Basov
Summary: The phenomenon of dragging light by moving media, predicted by Fresnel and verified by Fizeau, plays a key role in Einstein's special relativity theory. While experiments on dragging photons by an electron flow in solids have inconsistencies, the dragging of surface plasmon polaritons by an electron flow in graphene is a unique and complex phenomenon that challenges simple kinematics explanations.
Article
Chemistry, Multidisciplinary
Chen Chen, Yang Hang, Hui Shan Wang, Yang Wang, Xiujun Wang, Chengxin Jiang, Yu Feng, Chenxi Liu, Eli Janzen, James H. Edgar, Zhipeng Wei, Wanlin Guo, Weida Hu, Zhuhua Zhang, Haomin Wang, Xiaoming Xie
Summary: The bandgap of hBN nanoribbons (BNNRs) can be changed by spatial/electrostatic confinement. Water adsorption greatly reduces the bandgap of zigzag-oriented BNNRs (zBNNRs) and can tune their conductance and optical bandgaps.
ADVANCED MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Hai Hu, Na Chen, Hanchao Teng, Renwen Yu, Yunpeng Qu, Jianzhe Sun, Mengfei Xue, Debo Hu, Bin Wu, Chi Li, Jianing Chen, Mengkun Liu, Zhipei Sun, Yunqi Liu, Peining Li, Shanhui Fan, F. Javier Garcia de Abajo, Qing Dai
Summary: In this study, we report a topological transition in the isofrequency dispersion contours of hybrid polaritons supported by a two-dimensional heterostructure consisting of graphene and alpha-phase molybdenum trioxide. By chemically changing the doping level of graphene, we observed a transformation of the topology of polariton isofrequency surfaces. Moreover, when the substrate was changed, the dispersion contour became dominated by flat profiles at the topological transition, thus supporting tunable diffractionless polariton propagation.
NATURE NANOTECHNOLOGY
(2022)
Article
Physics, Applied
Takatoshi Yamada, Tomoaki Masuzawa, Yuki Okigawa
Summary: To enhance the carrier mobility and suppress the intrinsic carrier density of graphene on a silicon dioxide substrate, a potassium-doped nano graphene intermediate layer was introduced. Electrical properties of the fabricated graphene field-effect transistors were measured, and the results showed a shift in the Dirac point and increased carrier density and mobility. The ionized potassium atoms in the intermediate layer shielded the electric force from the negatively charged impurities, resulting in improved field-effect mobilities.
APPLIED PHYSICS LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Xiaoqing Yu, Alessandro Principi, Klaas-Jan Tielrooij, Mischa Bonn, Nikita Kavokine
Summary: Ultrafast spectroscopy experiments reveal that graphene electrons can transfer energy directly to liquid water without mediation from the crystal lattice. A quantum theory of solid-liquid heat transfer accounts for the water-specific cooling enhancement through a resonance between the graphene surface plasmon mode and water charge fluctuations. These findings provide direct experimental evidence of a solid-liquid interaction mediated by collective modes, supporting the theory of quantum friction and suggesting strategies for enhancing thermal conductivity in graphene-based nanostructures.
NATURE NANOTECHNOLOGY
(2023)
Article
Environmental Sciences
Weiguo Xu, Qiuya Zhang, Kailin Xu, Liwei Qiu, Jiabao Song, Liping Wang
Summary: In this study, BN-BiVO4 composites with visible-light response were prepared and used for the degradation of TCs. Results showed that 4BN-BiVO4 displayed superior photocatalytic performance under visible light irradiation, with 3.6 and 2.3 times higher degradation efficiency for TC and OTC compared to BiVO4. The combination of BN and BiVO4 effectively promoted the separation of photogenerated electrons and holes, enhancing the photocatalytic activity. The dominant reactive species were found to be center dot OH radicals and holes. Based on the experiments and characterization analysis, a possible photocatalytic mechanism for TCs degradation was proposed.
Article
Nanoscience & Nanotechnology
Shaoen Jin, Hang Zheng, Junyu Zong, Xuedong Xie, Fan Yu, Wang Chen, Libo Gao, Can Wang, Yi Zhang
Summary: The study demonstrates the etching growth mechanism of a h-BN film on graphene, showing the element composition, chemical bonding formation, and the formation of the new R0 degrees graphene through experiments and measurements. It provides a deeper understanding for further research on h-BN/graphene heterojunctions.
Article
Chemistry, Physical
Alfredo Segura, Ramon Cusco, Claudio Attaccalite, Takashi Taniguchi, Kenji Watanabe, Luis Artus
Summary: The study investigated the pressure dependence of bandgap transitions in hexagonal boron nitride using optical reflectance. It was found that with increasing pressure, both direct and indirect bandgap transitions shift downwards, with the direct transition exhibiting a faster decrease. After considering excitonic effects, it was observed that the pressure coefficient of the direct excitonic transition is much lower than that of the indirect excitonic transition.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Physics, Multidisciplinary
Bingyao Liu, Yu -Tian Zhang, Ruixi Qiao, Ruochen Shi, Yuehui Li, Quanlin Guo, Jiade Li, Xiaomei Li, Li Wang, Jiajie Qi, Shixuan Du, Xinguo Ren, Kaihui Liu, Peng Gao, Yu -Yang Zhang
Summary: We investigated the twist-angle-dependent coupling effects of h-BN/graphene heterostructures and found that moire potentials alter the band structure of graphene, resulting in a redshift of the intralayer transition at the M point. We also observed tunable vertical transition energies in the range of 5.1-5.6 eV due to the twisting of the Brillouin zone of h-BN relative to the graphene M point. These findings highlight the importance of considering twist-coupling effects in device fabrications and the potential of twist angles to design optoelectrical devices.
PHYSICAL REVIEW LETTERS
(2023)
Article
Chemistry, Physical
Qingzhong Gui, Zhen Wang, Zhaofu Zhang, Liu Xie, Xiaoming Zha, Jun Wang, Yuzheng Guo
Summary: In this study, a category of 2D materials called graphenelike monolayer monoxides, monochlorides, and mononitrides (GLMMs) are systematically studied using density functional theory and density functional perturbation theory. The stability of different native point defects in GLMMs is investigated energetically, showing their outstanding structural stability and high resistance to vacancy formation. The dielectric properties of GLMMs are explored and found to be promising for device applications.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Physical
Wei Zhan, Hongyan Wang, Jinling Gao, Xuemei Tang, Xingrui Zhu, Yuhan Xiao, Xiaoyan Sun, Wei Gao, Hong Yin
Summary: Developing highly efficient earth-abundant alternatives to traditional noble metal catalysts is important for clean and sustainable energy-conversion and energy-storage technologies. In this study, it is shown that hexagonal boron nitride (h-BN) can generate boron-active radicals at defect sites, leading to superior catalytic activity. Experimentally, a heterostructure with h-BN nanosheets anchored on reduced graphene oxide (rGO) as composite catalysts demonstrates excellent stability and improved oxygen evolution reaction (OER) activity.
Article
Chemistry, Multidisciplinary
Liubov Belyaeva, Cyril Ludwig, Yu-Cheng Lai, Chia-Ching Chou, Chih-Jen Shih
Summary: This study demonstrates a new approach to produce strain-free 2D monolayers at a macroscopic scale by using hydrogel substrates. These substrates overcome the limitations of previous methods and show superior uniformity and reproducibility. The extreme structural adaptability of hydrogel surfaces enables ultimate strain relaxation and uniformity in all types of 2D materials, regardless of their crystalline structure. The results suggest a universal strategy for attaining uniform and strain-free sheets of 2D materials and highlight the potential of interfacing them with soft matter.
Article
Chemistry, Physical
Stefan Goodwin, Zachary Coldrick, Sebastian Heeg, Bruce Grieve, Aravind Vijayaraghavan, Ernie W. Hill
Summary: This study presents a method for fabricating pristine monolayer graphene ultramicroelectrodes and characterizing their electrochemical properties. The cyclic voltammetry demonstrated expected behavior for ultramicroelectrodes, while reduction of IrCl62- was used to investigate electron transfer characteristics and reproducibility. Raman spectroscopy confirmed reduced charge doping in the graphene ultramicroelectrodes before and after electrochemical measurements.
Article
Materials Science, Multidisciplinary
Aaron Sheng, Saurabh Khuje, Jian Yu, Cheng-Gang Zhuang, Shenqiang Ren
Summary: This paper reports a copper-boron nitride hybrid conductor material capable of being used at high temperatures of 1000 degrees C, with high electrical conductivity and current-carrying capacity. The capillary action of liquid silver and alumina packaging strategies were introduced to enhance the high-temperature cyclability of the material.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Bujingda Zheng, Ganggang Zhao, Zheng Yan, Yunchao Xie, Jian Lin
Summary: 3D conformable electronic devices on freeform surfaces have superior performance and have witnessed exponential growth in various applications. However, their potential is limited by a lack of advanced fabrication techniques. To overcome this challenge, a new direct freeform laser fabrication method for directly fabricating 3D conformable electronics on targeted arbitrary surfaces is reported.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Engineering, Environmental
Zhengyang Wang, Xiangyu Bi, Xiaoqing He, Yunchao Xie, Jian Lin, Baolin Deng
Summary: Decentralized and/or point-of-use systems are crucial for addressing challenging water quality issues. Sorption-based approaches, with their simplicity in operation, are ideal for such applications. This study presents a two-sorbent system consisting of Fe2O3-coated mesoporous carbon and nano-Fe2O3-coated activated carbon, which effectively removes arsenate through a capture-and-storage process with a short empty bed contact time.
Article
Plant Sciences
Erin M. Mattoon, William E. McHargue, Catherine E. Bailey, Ningning Zhang, Chen Chen, James Eckhardt, Chris G. Daum, Matt Zane, Christa Pennacchio, Jeremy Schmutz, Ronan C. O'Malley, Jianlin Cheng, Ru Zhang
Summary: By conducting genome-wide screens and transcriptomics/proteomics analysis, we identified a list of 933 high/medium-confidence genes with putative roles in heat tolerance in photosynthetic cells of the green alga Chlamydomonas. This provides potential engineering targets to improve thermotolerance in algae and crops.
PLANT CELL AND ENVIRONMENT
(2023)
Review
Engineering, Electrical & Electronic
Md. Maruf Hossain Shuvo, Syed Kamrul Islam, Jianlin Cheng, Bashir I. Morshed
Summary: The successful integration of deep neural networks has led to breakthroughs in various fields, but deploying these accurate models for practical machine learning solutions remains challenging. Deep learning algorithms are often computationally expensive, power-hungry, and require large memory. Edge devices, such as mobile phones and IoT devices, have limited resources but can reduce cloud transmission cost.
PROCEEDINGS OF THE IEEE
(2023)
Review
Materials Science, Multidisciplinary
Yunchao Xie, Kianoosh Sattari, Chi Zhang, Jian Lin
Summary: The increasing demand for novel materials has led to the retrofitting of traditional research paradigms with artificial intelligence and automation. An autonomous experimental platform (AEP) has emerged as a research frontier that integrates data-driven algorithms and experimental automation for material development. This review provides insights into developing data-driven algorithms, recent progress in automated material synthesis, ML-enabled data analysis, and decision-making, and the challenges and opportunities in developing the next-generation AEP for autonomous laboratories.
PROGRESS IN MATERIALS SCIENCE
(2023)
Article
Biochemical Research Methods
Tianqi Wu, Zhiye Guo, Jianlin Cheng
Summary: A deep learning-based method called ATOMRefine is developed to improve the quality and nativeness of predicted protein structures. It directly refines protein atomic coordinates to enhance the initial structural models generated by AlphaFold, outperforming state-of-the-art refinement methods.
Article
Biochemistry & Molecular Biology
Nabin Giri, Raj S. Roy, Jianlin Cheng
Summary: Cryo-Electron Microscopy (cryo-EM) is a crucial technology for determining protein structures, especially large complexes and assemblies. The challenge lies in automatically reconstructing accurate protein structures from cryo-EM density maps. This review provides an overview of deep learning methods used for building protein structures from cryo-EM density maps, analyzes their impact, and discusses the challenges in preparing high-quality training data sets. Advanced deep learning models that integrate cryo-EM data with other complementary sources such as protein sequences and AlphaFold-predicted structures need to be developed for future advancements in the field.
CURRENT OPINION IN STRUCTURAL BIOLOGY
(2023)
Article
Multidisciplinary Sciences
Ashwin Dhakal, Rajan Gyawali, Liguo Wang, Jianlin Cheng
Summary: Cryo-electron microscopy is a powerful technique for accurately determining biological macromolecular complexes. However, the process of picking single-protein particles from cryo-EM micrographs is time-consuming. To address this issue, we introduce CryoPPP, a large, diverse, expert-curated cryo-EM image dataset for efficient protein particle picking and analysis.
Article
Engineering, Manufacturing
Jacob Search, Alireza Mahjoubnia, Andy C. Chen, Heng Deng, Aik Jong Tan, Shi-you Chen, Jian Lin
Summary: The emergence of 3D printing has advanced the fabrication of 3D structures, but current techniques have limitations in print time and versatility. This study introduces a new approach using a rapid liquid-to-solid phase change mechanism enabled by humidity to print selectively porous, freestanding structures without support. Various structures were successfully printed, and the printed material showed great biocompatibility.
ADDITIVE MANUFACTURING
(2023)
Article
Biochemistry & Molecular Biology
Hua Yang, Xiaowen Shi, Chen Chen, Jie Hou, Tieming Ji, Jianlin Cheng, James A. Birchler
Summary: Genomic imbalance refers to the more severe phenotypic consequences of changing part of a chromosome compared with the whole genome set. Studies have found that aneuploidy often shows an inverse modulation of transposable elements (TEs), while reductions in monosomy and increases in disomy and trisomy are also common. The ploidy series, on the other hand, showed little TE modulation. The modulation of TEs and genes in the same experimental group were compared, and TEs showed greater modulation than genes, especially in disomy.
PLANT COMMUNICATIONS
(2023)
Article
Biochemical Research Methods
Russell B. Davidson, Mark Coletti, Mu Gao, Bryan Piatkowski, Avinash Sreedasyam, Farhan Quadir, David J. Weston, Jeremy Schmutz, Jianlin Cheng, Jeffrey Skolnick, Jerry M. Parks, Ada Sedova
Summary: This study utilizes AlphaFold to predict the structural proteome of Sphagnum divinum, and provides structure alignment and enzyme classification, filling the gaps in the field of protein structure for Sphagnum species.
Article
Biochemistry & Molecular Biology
Raj S. Roy, Jian Liu, Nabin Giri, Zhiye Guo, Jianlin Cheng
Summary: In this study, a new method (MULTICOM_qa) was proposed to estimate the accuracy of protein complex models by combining pairwise similarity score (PSS) and interface contact probability score (ICPS) based on deep learning inter-chain contact prediction. The method performed well in estimating the global structure accuracy of assembly models and demonstrated the effectiveness of combining PSS and ICPS.
PROTEINS-STRUCTURE FUNCTION AND BIOINFORMATICS
(2023)
Article
Multidisciplinary Sciences
Cole E. E. McKay, Jianlin Cheng, John J. J. Tanner
Summary: The crystal structure of the domain of unknown function family 507 protein from Aquifex aeolicus was determined, revealing a Y-shaped α-helical structure with pseudo-twofold symmetry. The structures differ in their C-terminal arm rotation, suggesting a potential functional site.
SCIENTIFIC REPORTS
(2023)
Article
Biochemical Research Methods
Yanli Wang, Zhiye Guo, Jianlin Cheng
Summary: In this study, we developed a new deep learning method called ScHiCEDRN for improving single-cell Hi-C data using deep residual networks and generative adversarial networks. Experimental results showed that ScHiCEDRN outperforms other four deep learning methods in enhancing raw single-cell Hi-C data of human and Drosophila, and it can generate single-cell Hi-C data more suitable for identifying topologically associating domain boundaries and reconstructing 3D chromosome structures.
Article
Biochemical Research Methods
Chen Chen, Xiao Chen, Alex Morehead, Tianqi Wu, Jianlin Cheng
Summary: The researchers developed a new graph-based 3D-equivariant neural network method to estimate the accuracy of protein structural models. Their approach achieved state-of-the-art performance on protein structural models predicted by both traditional protein structure prediction methods and the latest end-to-end deep learning method-AlphaFold2. This suggests that 3D-equivariant graph neural network is a promising approach for the evaluation of protein structural models.