Article
Engineering, Electrical & Electronic
Naktal Al-Dulaimi, Mundher Al-Shakban, Edward A. Lewis, Paul D. McNaughter, Firoz Alam, Sarah J. Haigh, David J. Lewis
Summary: Polycrystalline thin films of molybdenum-doped rhenium disulphide alloys were synthesized using AACVD, and characterized by various techniques. It was found that increasing Mo content affected the structure and vibrational modes of the ReS2 matrix.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2021)
Article
Multidisciplinary Sciences
A. Poszwa
Summary: This article presents a theoretical investigation on the properties of neutral excitons confined to a mono-layer semiconductor TMDC material under the influence of an elliptically deformed gate-induced confining potential. The study shows that the anisotropy of the confinement leads to an anisotropic linear response of the system to in-plane external electric fields.
SCIENTIFIC REPORTS
(2022)
Article
Materials Science, Multidisciplinary
Xinli Ma, Jing Zhang, Jiawei Lai, Mingwen Zhang, Jingchuan Zheng, Sen Wu, Xiaodong Hu, Qinsheng Wang, Xuetao Gan, Dong Sun, Jing Liu
Summary: This study introduces Re doping to produce monolayer MoS2 with valley degree of freedom and anisotropy, achieving improved electrical and optoelectrical performances. The anisotropic optical response of Re-doped MoS2 increases with Re concentration, indicating promising potential for developing polarization sensitive valleytronic devices. The anisotropic response is attributed to strain induced by dopants, preserving optical helicity dependent valley selection rules in the 2H lattice structure.
Article
Energy & Fuels
Sonam Rani, Manushree Tanwar, Meenu Sharma, Love Bansal, Rajesh Kumar, Ravi Bhatia, Sameera Ivaturi
Summary: Among transition metal dichalcogenides, molybdenum disulfide (MoS2) is considered as the most cost-effective electrode material for energy storage applications. Altering the synthesis conditions of MoS2 nanoflowers can result in enhanced charge storage performance.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Multidisciplinary
Inseong Lee, Mingu Kang, Seohak Park, Cheolmin Park, Hyeonji Lee, Sanggeun Bae, Hyeongjin Lim, Sungkyu Kim, Woonggi Hong, Sung-Yool Choi
Summary: This study proposes a method to heal donor defect states in monolayer MoS2 using oxygen plasma, with an aluminum oxide (Al2O3) barrier layer that protects the MoS2 channel from damage. The successful healing of donor defect states in MoS2 by oxygen atoms, even in the presence of an Al2O3 barrier layer, has been confirmed. The proposed method enhances the channel properties of MoS2.
Review
Physics, Multidisciplinary
Rui Yang, Jianuo Fan, Mengtao Sun
Summary: This review summarizes the optoelectric properties of heterojunctions based on TMDCs materials, showing that TMDCs heterojunctions exhibit excellent performance due to their special electronic band structures, providing a prototype for the design and development of future high-performance optoelectric devices.
FRONTIERS OF PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Fang Li, Rui Tao, Banglin Cao, Lei Yang, Zegao Wang
Summary: This study synthesized large-area PtS films and fabricated MoS2/PtS p-n heterojunction, discussing its energy band structure and photoresponse characteristics, achieving improved room temperature photodetection performance.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Zhenyu Wang, Cheol-Yeon Cheon, Mukesh Tripathi, Guilherme Migliato Marega, Yanfei Zhao, Hyun Goo Ji, Michal Macha, Aleksandra Radenovic, Andras Kis
Summary: In this study, epitaxial chemical vapor deposition growth of 2D NbS2 crystals on a sapphire substrate was demonstrated, with controlled thickness and phase transition. The high-quality superconducting properties of the NbS2 crystals were confirmed through Raman spectroscopy, STEM, and electrical transport measurements, making them suitable for next-generation TMDC-based electrical devices.
Article
Chemistry, Multidisciplinary
Frederick Osei-Tutu Agyapong-Fordjour, Seok Joon Yun, Hyung-Jin Kim, Wooseon Choi, Balakrishnan Kirubasankar, Soo Ho Choi, Laud Anim Adofo, Stephen Boandoh, Yong In Kim, Soo Min Kim, Young-Min Kim, Young Hee Lee, Young-Kyu Han, Ki Kang Kim
Summary: Metallic-TMdCs catalysts have highly reactive basal-plane but are unstable, while chemically stable semiconducting-TMdCs show limiting catalytic activity. By dispersing metallic vanadium sulfide in a semiconducting MoS2 film to form V-MoS2 as an efficient catalyst, excellent hydrogen evolution reaction performance is achieved.
Article
Chemistry, Physical
Cheng Zhang, Biyuan Zheng, Guangcheng Wu, Xueying Liu, Jiaxin Wu, Chengdong Yao, Yizhe Wang, Zilan Tang, Ying Chen, Lizhen Fang, Luying Huang, Dong Li, Shengman Li, Anlian Pan
Summary: In this study, In2Se3/WSe2 heterostructures were successfully synthesized via a two-step chemical vapor deposition (CVD) method. The integration of the strong light absorption layer In2Se3 nanosheet with the monolayer WSe2 significantly enhanced the photosensitivity of WSe2. The resulting In2Se3/WSe2 heterostructure device exhibited an ultrahigh photoresponsivity of 2333.5 A/W and a remarkable detectivity of 6.7 x 10(12) Jones under laser irradiation, making it one of the highest performing TMDCs-based heterostructures reported to date.
Article
Chemistry, Physical
Kenan Zhang, Meng Wang, Xue Zhou, Yuan Wang, Shengchun Shen, Ke Deng, Huining Peng, Jiaheng Li, Xubo Lai, Liuwan Zhang, Yang Wu, Wenhui Duan, Pu Yu, Shuyun Zhou
Summary: This study presents the growth of centimeter-scale PtTe, 1T-PtTe2, and 1T-PtSe2 films by direct deposition of platinum metals followed by tellurization or selenization. The research demonstrates that controlling the tellurium flux allows for the formation of a previously unexplored PtTe phase, which can be further tuned into PtTe2 through high temperature annealing. Electrical measurements show that PtTe2 and PtTe films are metallic unlike the semiconducting PtSe2.
Article
Physics, Multidisciplinary
Fang Li, Jun Fu, Mingzhu Xue, You Li, Hualing Zeng, Erjun Kan, Ting Hu, Yi Wan
Summary: Sliding ferroelectricity, resulting from lateral relative movements between atomic layers, provides new possibilities for designing two-dimensional (2D) ferroelectrics. However, further research is needed to explore ferroelectricity in potential 2D systems. In this study, vertical ferroelectricity was observed in layered semiconducting rhenium diselenide (ReSe2), opening up potential applications for functional nanoelectronics due to its semiconducting properties and low switching barrier.
FRONTIERS OF PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
M. P. Aparna, Raghu Chatanathodi
Summary: In this paper, the edge geometry, stability, electronic structure, and magnetism of ReS2 nanoribbons were investigated using density functional theory. The study found that ReS2 nanoribbons have stable edge structures, some of which exhibit magnetism. Passivation of the edge atoms with hydrogen improves the stability. ReS2 nanoribbons show potential applications in the field of electrochemical catalysis.
ACS APPLIED NANO MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Saravana Balaji Basuvalingam, Matthew A. Bloodgood, Marcel A. Verheijen, Wilhelmus M. M. Kessels, Ageeth A. Bol
Summary: The scalable and conformal synthesis of nanometer-thick 2D transition metal dichalcogenide (TMDC) heterostructures has been achieved using atomic layer deposition (ALD) at low temperatures. The precise thickness control of individual TMDC material layers and successful deposition on large-area planar substrates and 3D nanowire arrays demonstrate the potential for application in nanoelectronics. The advantages of ALD for scalable synthesis of 2D heterostructures conformally over a 3D substrate with precise thickness control make this technology promising for both back-end-of-line (BEOL) and front-end-of-line (FEOL) processes.
ACS APPLIED NANO MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Seongin Hong, Seungho Baek, Thi Thu Thuy Can, Woon-Seop Choi, Sunkook Kim
Summary: The study presents MoS2 photodetectors fabricated using electrohydrodynamic jet printing, showing high photosensitivity and photoresponsivity in both two-terminal and three-terminal configurations. This new approach provides a feasible solution for TMD-based photonics with high performance.
ADVANCED ELECTRONIC MATERIALS
(2022)
Article
Chemistry, Physical
Mengchao Liang, Tianyu Xia, Han Gao, Kai Zhao, Tianqi Cao, Meng Deng, Xiaoyan Ren, Shunfang Li, Haizhong Guo, Rongming Wang
Summary: In this study, PtAu bimetallic nanoparticles loaded onto Co and N co-doping carbon nanoframes were designed to improve the selectivity of the direct reaction pathway for efficient formic acid oxidation (FAO) in fuel cells. The results showed that suitable amount of Au in the PtAu/CoNC catalyst can promote the direct FAO pathway, significantly enhancing the oxidation efficiency of formic acid. The synergistic effect of Pt, Au, and CoNC NFs was found critical for the resistance to CO poisoning, highlighting a promising strategy for improving catalyst performance in FAO.
Correction
Chemistry, Physical
Yuchen Zhu, Yinghui Sun, Hongzhou Zhang, Yang He, Wei Liu, Rongming Wang
Article
Chemistry, Physical
Yucheng Zhu, Yinghui Sun, Hongzhou Zhang, Yang He, Wei Liu, Rongming Wang
Summary: The heterostructure of transition metal nanocrystal on two-dimensional materials exhibits unique properties through interfacial interactions. However, understanding and control of the interfacial structures remain challenging. In this study, the regulation of interface on MoS2 supported Pt nanocrystals was explored. It was found that the strain within the Pt nanocrystals is sensitive to the atomic configuration of the supporting MoS2, which influences the size of the Pt nanocrystals.
Article
Nanoscience & Nanotechnology
Qinglin Liu, Huanyu Ye, Zhihong Zhang, Rongming Wang
Summary: Metal nanocrystals with high surface-to-volume ratio exhibit unique properties and have potential applications in electronics, magnetics, optics, and catalysis. However, their high specific surface area leads to easy coarsening during operation, degrading their performance. Hence, directly visualizing the structural evolution of nanocrystals during coarsening is essential to understand the mechanism and improve their size stability.
NANOTECHNOLOGIES IN CONSTRUCTION-A SCIENTIFIC INTERNET-JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Tianyu Xia, Kai Zhao, Youqi Zhu, Xiaoyan Bai, Han Gao, Ziyu Wang, Yue Gong, Menglin Feng, Shunfang Li, Qiang Zheng, Shouguo Wang, Rongming Wang, Haizhong Guo
Summary: Mixed-dimensional Pt-Ni alloy polyhedral nanochains were fabricated to address the unbalanced relationship between activity and stability in Pt nanocatalysts. These nanochains exhibited significantly enhanced mass activity for methanol oxidation reaction and improved stability against CO poisoning. Additionally, they achieved a higher half-wave potential for oxygen reduction reaction.
ADVANCED MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Haofei Zhao, Yuchen Zhu, Huanyu Ye, Yang He, Hao Li, Yifei Sun, Feng Yang, Rongming Wang
Summary: Nanocrystals play a crucial role in material sciences and industry. Designing nanocrystals with desired structures and properties is a major challenge that requires a deep understanding of atomic-scale dynamics. In situ transmission electron microscopy (TEM), especially environmental TEM, has provided valuable insights into nanocrystals. This comprehensive review highlights the progress in the understanding of nanocrystal dynamics, including nucleation and growth, structure evolution, and dynamics in reaction conditions.
ADVANCED MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Yange Wang, Yechen Wang, Jing Bai, Sibin Duan, Rongming Wang, Woon-Ming Lau
Summary: In this study, tungsten nanodots and nitrogen-decorated carbon skeleton catalysts were prepared for hydrogen evolution reaction. The optimized W@NC hybrids exhibited excellent HER performance and durability in alkaline media.
NANOTECHNOLOGIES IN CONSTRUCTION-A SCIENTIFIC INTERNET-JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Yadi Cao, Yinghui Sun, Huanhuan Yang, Liang Zhou, Qianming Huang, Jiajie Qi, Pengfei Guan, Kaihui Liu, Rongming Wang
Summary: In this study, the directional migration and structural evolution of Au nanoparticles on anisotropic ReS2 were investigated using aberration-corrected transmission electron microscopy. It was found that Au nanoparticles with diameters below 3 nm preferentially migrate along the b-axis direction. Density functional theory calculations revealed that the lower diffusion energy barrier enables the directional migration. The coalescence kinetics of Au nanoparticles were quantitatively described using the relationship r(2) = Kt. This work provides an atomic-resolved dynamic analysis method for studying the interfacial structural evolution of metal/2D materials, which is crucial for understanding the stability of nanodevices based on mixed-dimensional nanomaterials.
Article
Materials Science, Multidisciplinary
Yu Zhang, Xue-Ai Teng, Ze-Qun Ma, Rong-Ming Wang, Woon-Ming Lau, Ai-Xian Shan
Summary: A novel synthesis strategy for FeOOH hollow tubes with one-dimensional and hollow features was proposed and successfully implemented. The FeOOH scaly hollow tubes exhibited outstanding catalytic activity, low Tafel slope, and robust stability as oxygen evolution reaction catalysts. This work enhances the feasibility to broaden the design ideas of transition metal-based catalysts.
Article
Chemistry, Multidisciplinary
Xiaoyan Bai, Tianqi Cao, Tianyu Xia, Chenxiao Wu, Menglin Feng, Xinru Li, Ziqing Mei, Han Gao, Dongyu Huo, Xiaoyan Ren, Shunfang Li, Haizhong Guo, Rongming Wang
Summary: Constructing a heterogeneous interface using different components is an effective way to achieve the bifunctionality of nanocatalysts, and synergistic interactions between multiple interfaces can optimize the performance of single-interface nanocatalysts. A multiple-interfaced sandwich-like nanostructure MoS2/NiSe2/reduced graphene oxide (rGO) is prepared, showing excellent catalytic performance in water splitting reactions. Assembled into a modified two-electrode system, the nanostructures exhibit an overpotential even exceeding that of noble metal nanocatalysts.
Article
Chemistry, Physical
Xiaodan Wang, Yao Lu, Rui Li, Dongsheng Ren, Xiaoyue Wang, Chunxue Liu, Rongming Wang, Xiang Hu, Zhenhai Wen, Xiangming He
Summary: This study reports a superlattice Zn3V2O7-C as a conversion-type cathode material for AZIBs, which exhibits high capacity and long-term stability.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yuan Ma, Yongqing Chen, Tao Guo, Hong-Hui Wu, Rongming Wang, Yang He, Luning Wang, Lijie Qiao
Summary: In this study, the atomic shuffling mechanism during twinning nucleation in rhenium nanocrystals was analyzed using in situ high-resolution transmission electron microscopy. It was found that the double-layered prismatic planes initially shuffle into single-layered BCT planes, and subsequently adjacent BCT planes shuffle in opposite directions to form the basal planes of the twin embryo. Molecular dynamic simulations further confirmed this shuffling mechanism. These findings provide direct evidence of shuffle-dominated twinning nucleation with atomic details, which may contribute to better control of this critical twinning mode in HCP metals.
Article
Chemistry, Multidisciplinary
Shiyu Zhu, Yun Liu, Yue Gong, Yuting Sun, Kang Chen, Yuan Liu, Weidi Liu, Tianyu Xia, Qiang Zheng, Han Gao, Haizhong Guo, Rongming Wang
Summary: PtCo@PtIr nanoparticles with a quasi-octahedral PtCo nanocrystal core and an ultrathin PtIr atomic layer shell are successfully designed and fabricated. With their unique geometric and core-shell features, the PtCo@PtIr nanoparticles exhibit significantly higher mass and specific activities as an ORR catalyst compared to a commercial Pt/C catalyst, and show extraordinary durability. Furthermore, when evaluated with the ORR-OER dual reaction, the PtCo@PtIr nanoparticles demonstrate a small ORR-OER overpotential gap, indicating their great potential as a bifunctional electrocatalyst for fuel cell applications.
Article
Materials Science, Multidisciplinary
Haofei Zhao, Wenrui Li, Rongming Wang
Summary: In this study, Fe-doped NiS2 samples with various doping contents were successfully prepared via a solvothermal process. The morphology, microstructure, electronic structure, and catalytic activity for oxygen evolution reaction (OER) were systematically investigated. The results showed that the sample with an Fe content of around 16% exhibited the best electrocatalytic performance, with low overpotential, small Tafel slope, and excellent stability. After long-term OER testing, stable and homogeneous porous nanostructures of Ni(Fe) oxide with residual S were observed. The enhanced OER property was attributed to the local composition variation of Fe at the nanoscale and the synergic effect of Fe and Ni. This study provides important insights into the rational design and synthesis of superior transition-metal based water splitting electrocatalysts.
MATERIALS ADVANCES
(2022)
Review
Physics, Multidisciplinary
Ying-Hui Sun, Cong-Yan Mu, Wen-Gui Jiang, Liang Zhou, Rong-Ming Wang
Summary: This review summarizes the recent progress in interface modulation and physical properties of the heterostructure of metal nanoparticles and 2D materials. By designing interfaces, the structure-property relationship can be revealed and the performance of the heterostructure-based devices can be optimized. The effects of metal nanoparticles on the crystal structure, electronic state, and energy band of 2D materials are discussed, as well as possible interfacial strain and reaction. Modulating the electrical and optical properties of 2D materials improves the performance of metal nanoparticle-2D material devices.
ACTA PHYSICA SINICA
(2022)