Article
Materials Science, Multidisciplinary
S. Azar Oliaei Motlagh, Vadym Apalkov
Summary: The interaction between graphene quantum dots (GQDs) and ultrashort strong optical pulses was studied theoretically. The absorbance of GQDs has a highly nonlinear dependence on the field amplitude, showing different relationships at small and large-field amplitudes. The absorbance also has a maximum value depending on the size of the dot as the field amplitude changes.
Article
Biochemistry & Molecular Biology
Junnan Guo, Xinyue Dai, Lishu Zhang, Hui Li
Summary: In this study, the transport properties of van der Waals heterojunctions of two-dimensional atomic crystals were investigated using density functional theory and nonequilibrium Green's function technique. It was found that the formation of heterojunctions does not open the Dirac point of graphene, but preserves the band structures of both graphene and WS2. The origin and mechanism of the unique linear I-V characteristics were revealed through analysis of transmission spectra, density of states, and transmission eigenstate.
Article
Chemistry, Physical
Oleg Kononenko, Maria Brzhezinskaya, Aleksandr Zotov, Vitaly Korepanov, Vladimir Levashov, Victor Matveev, Dmitry Roshchupkin
Summary: Band structure engineering through changing the parameters of Moire superlattices can create materials with outstanding properties. This study demonstrated the strong dependence of the transport properties of twisted multilayer graphene (tMLG) on its structural characteristics. tMLG with a large content of the twisted phase was found to have perfect structure and extraordinary transport characteristics, while changes in the content of the twisted phase led to a significant decrease in transport properties. Therefore, tMLG is a better choice for the nanoelectronics industry.
Review
Materials Science, Multidisciplinary
Hadi Rasuli, Reza Rasuli
Summary: In this review, the hybrid nanomaterials based on graphene oxide and nanoparticles are discussed. The synthesis, properties, and applications of immobilized transition metal oxide nanoparticles on graphene/GO are reviewed. The interaction of graphene/GO with decorated nanoparticles and the physical properties of these materials are also discussed. Promising applications of the graphene/GO-NPs materials in drug delivery, antimicrobial applications, plasmonic, and solar cells are presented.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Chemistry, Physical
Thi My Duyen Huynh, Guo-Song Hung, Godfrey Gumbs, Ngoc Thanh Thuy Tran
Summary: In this study, first-principles calculations are used to investigate the feature-rich properties of alkali-metal intercalated graphene nanoribbons (GNRs), including edge passivation, stacking configurations, intercalation sites, stability, charge density distribution, magnetic configuration, and electronic properties. The findings demonstrate a transformation from finite gap semiconducting to metallic behaviors, indicating enhanced electrical conductivity. This transformation is attributed to the cooperative or competitive relations among the significant chemical bonds, finite-size quantum confinement, edge structure, and stacking order. The decoration of edge structures with hydrogen and oxygen atoms provides additional information about stability and magnetization due to the ribbons' effect.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
L. P. Miranda, D. R. Da Costa, F. M. Peeters, R. N. Costa Filho
Summary: This study investigates the effects of defect clustering on the electronic and transport properties of bilayer graphene nanoribbons. The researchers observe evident vacancy concentration signatures around the zero-energy level, regardless of system size, stacking, and boundary types. The results indicate that the strong sizeable vacancy clustering effect and the breaking of inversion symmetry at high vacancy densities play a crucial role in explaining this phenomenon.
Review
Physics, Applied
Yoshitaka Fujimoto
Summary: This paper reviews the molecular adsorptions, electronic properties, and quantum transport of graphene, revealing its potential applications in environmental monitoring and medical diagnosis, providing a theoretical basis for designing graphene-based sensors.
MODERN PHYSICS LETTERS B
(2021)
Article
Chemistry, Multidisciplinary
Guillaume Libeert, Ramasamy Murugesan, Marton Guba, Wout Keijers, Simon Collienne, Bart Raes, Steven Brems, Stefan De Gendt, Alejandro Silhanek, Tibor Holtzl, Michel Houssa, Joris Van de Vondel, Ewald Janssens
Summary: This paper presents a new method to quantify the energy barriers for adsorption and desorption of gas molecules on few-atom clusters by utilizing reaction-induced changes of the doping level of a graphene substrate. The method is illustrated for oxygen adsorption on Au-3 clusters.
Article
Chemistry, Multidisciplinary
Lunwei Yang, Wei Xiao, Jianwei Wang, Xiaowu Li, Ligen Wang
Summary: The study systematically investigated the adsorption and sensing properties of HCHO on small Pd-n (n = 1-6) cluster decorated graphene, finding that the adsorption energy can be tuned by the size of the Pd-n cluster. The Pd-n/graphene systems (n = 5 and 6) show appropriate adsorption energy for HCHO gas sensing and have high sensitivity. The devices built with Pd-n/graphene (n = 5 and 6) exhibit over 20% absolute response at low voltages, making them promising for HCHO detection applications.
Article
Engineering, Electrical & Electronic
Tahereh Radsar, Hassan Khalesi, Vahid Ghods
Summary: The reduction in silicon-based device dimensions has led to significant advancements in electronic systems performance. Recent studies have explored the advantages and challenges of shrinking silicon devices, with many concluding that silicon technology is approaching its limits and new innovations are needed. Graphene emerges as a promising material for future nanoelectronics, offering unique properties and potential applications. This paper discusses various aspects of graphene, including production approaches, fundamental properties, defect types, application potentials, and electronic specifications of graphene nanoribbons. Simulation results indicate that properties such as band gap can be controlled by manipulating the width, defect, and doping concentration of graphene nanoribbons, making them suitable for graphene nanoribbon field effect transistors.
OPTICAL AND QUANTUM ELECTRONICS
(2021)
Article
Chemistry, Multidisciplinary
Junjie Chen, Lingyu Meng
Summary: Understanding the effect of phonon scattering on the thermal transport properties of graphene ribbons is of great importance. This study investigated the heat transport properties of graphene ribbons by considering different polarization branches with different frequencies. The results showed that graphene ribbons have high heat conductivity in all cases, and the temperature strongly affects the relative contribution of the phonon branches.
Article
Materials Science, Multidisciplinary
Ahmal Jawad Zafar, Aranyo Mitra, Vadym Apalkov
Summary: In this study, the electron dynamics of a graphene nanoring in the presence of an ultrashort optical pulse were theoretically investigated. It was found that circularly polarized pulses can induce valley polarization in the graphene nanoring, whereas no valley polarization is observed in a graphene monolayer. The magnitude of the valley polarization in the graphene nanoring depends on the system parameters.
Article
Materials Science, Multidisciplinary
Ke Wang, T. A. Sedrakyan
Summary: Perpendicular magnetic field introduces an anomalous interaction correction to the static conductivity of doped graphene, leading to a proportional relationship between magnetoresistance and inverse temperature. This behavior originates from field-induced breaking of symmetry.
Article
Chemistry, Multidisciplinary
Xiaoping Liang, Mengjia Zhu, Haifang Li, Jinxin Dou, Muqiang Jian, Kailun Xia, Shuo Li, Yingying Zhang
Summary: This work presents the fabrication of a hydrophilic, breathable, biocompatible, and washable graphene-decorated electronic textile using silk sericin. The resulting textile exhibits good conductivity, excellent hydrophilicity, biocompatibility, breathability, and flexibility. An integrated multisensing textile is also developed based on this textile, allowing for the collection and analysis of myoelectrical and mechanical signals. This strategy provides a scalable and sustainable way to construct smart wearables.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
A. Harres, W. J. S. Garcia, T. R. Salles, F. S. Bruckmann, J. B. Sulzenco, A. D. Schneider, C. R. B. Rhoden
Summary: This study investigates the magnetic properties of graphene oxide decorated with magnetite nanoparticles (GO•Fe3O4) at room temperature. The size distribution of the magnetic nanoparticles plays a significant role in the magnetic behavior, with smaller particles exhibiting superparamagnetic behavior and larger particles exhibiting ferrimagnetic behavior. The magnetic parameters, such as coercivity and remanent magnetisation, are mainly influenced by the average particle size rather than demagnetising interactions.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Chemistry, Physical
Jia-Lin Meng, Tian-Yu Wang, Lin Chen, Qing-Qing Sun, Hao Zhu, Li Ji, Shi-Jin Ding, Wen-Zhong Bao, Peng Zhou, David Wei Zhang
Summary: A low-dimensional flexible hybrid photoelectric-modulated artificial heterosynapse was constructed, demonstrating extremely low energy consumption and ultrafast response while successfully emulating neuromorphic functions. The device can effectively modulate the short-term potentiation correlations and multiple memory states of the heterosynapse.
Article
Nanoscience & Nanotechnology
Hanqi Liu, Kun Ba, Saifei Gou, Yawei Kong, Tong Ye, Jiong Ma, Wenzhong Bao, Peng Zhou, David Wei Zhang, Zhengzong Sun
Summary: Monolayer molybdenum disulfide (MoS2) transferred onto polytetrafluoroethylene (PTFE) substrate exhibited a strong p-doping effect and charge transfer, transforming its electronic structure into that of a hole-rich p-type semiconductor.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Multidisciplinary Sciences
Yin Wang, Hongwei Tang, Yufeng Xie, Xinyu Chen, Shunli Ma, Zhengzong Sun, Qingqing Sun, Lin Chen, Hao Zhu, Jing Wan, Zihan Xu, David Wei Zhang, Peng Zhou, Wenzhong Bao
Summary: The research proposes a new circuit architecture that utilizes MoS2 transistors for efficient in-memory computing, enabling high-capacity MAC operations in a small area. By storing multi-level voltages and combining analog computation, tasks such as image recognition are achieved.
NATURE COMMUNICATIONS
(2021)
Editorial Material
Nanoscience & Nanotechnology
Jianye Fu, Meng Qiu, Wenzhong Bao, Han Zhang
ADVANCED ELECTRONIC MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Jialin Meng, Tianyu Wang, Hao Zhu, Li Ji, Wenzhong Bao, Peng Zhou, Lin Chen, Qing-Qing Sun, David Wei Zhang
Summary: This study demonstrated the fabrication of an artificial retina based on 2D Janus MoSSe, inspired by biological eyes, to simulate visual perception functions. Furthermore, integration of sensing, memory, and neuromorphic computing functions on one device was achieved, inspired by the human brain, ensuring scalability and high efficiency.
Article
Multidisciplinary Sciences
Shunli Ma, Tianxiang Wu, Xinyu Chen, Yin Wang, Hongwei Tang, Yuting Yao, Yan Wang, Ziyang Zhu, Jianan Deng, Jing Wan, Ye Lu, Zhengzong Sun, Zihan Xu, Antoine Riaud, Chenjian Wu, David Wei Zhang, Yang Chai, Peng Zhou, Junyan Ren, Wenzhong Bao
Summary: Research has shown that a MoS2 artificial neural network (ANN) chip with multiply-and-accumulate (MAC), memory, and activation function circuits has been successfully developed. Based on the design and optimization of analog ANN circuits, a tactile digit recognition application was demonstrated. This work not only showcases the potential of 2D semiconductors in wafer-scale integrated circuits, but also opens up possibilities for their future application in AI computation.
Article
Materials Science, Multidisciplinary
Jingyi Ma, Xinyu Chen, Yaochen Sheng, Ling Tong, Xiaojiao Guo, Minxing Zhang, Chen Luo, Lingyi Zong, Yin Xia, Chuming Sheng, Yin Wang, Saifei Gou, Xinyu Wang, Xing Wu, Peng Zhou, David Wei Zhang, Chenjian Wu, Wenzhong Bao
Summary: This study investigates a doping-free strategy using top-gated MoS2 field-effect transistors with various metal gates. Different metals with different work functions provide a convenient tuning knob for controlling the threshold voltage of the MoS2 FETs. By achieving matched electrical properties for load and driver transistors in an inverter circuit, wafer-scale MoS2 inverter arrays with optimized switching threshold voltage and voltage gain were successfully demonstrated.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Xinyu Chen, Honglei Chen, Yangye Sun, Simeng Zhang, Yin Xia, David Wei Zhang, Peng Zhou, Wenwu Li, Zhengzong Sun, Wenzhong Bao
Summary: The fabrication and characterization of wafer-scale heterostructure arrays composed of multilayer 2H-MoTe2 and single-layer 2H-MoS2 are demonstrated. The p-MoTe2/n-MoS2 heterostructure devices exhibit an excellent gate-tunable PN diode behavior and complementary inverters.
Article
Nanoscience & Nanotechnology
Dong-Hui Zhao, Xiao-Jiao Guo, Ling Tong, Tian-Yu Wang, Zheng-Hao Gu, Tian-Bao Zhang, Hao Zhu, Wen-Zhong Bao, Lin Chen, Li Ji, Qing-Qing Sun, David Wei Zhang
Summary: In this study, large-scale, continuous, and uniform multilayer MoS2 nanosheets were grown by atomic layer deposition, and high-quality MoS2 nanosheets were obtained through large-area peeling and transfer. The MoS2 photodetectors fabricated from these materials exhibited excellent performance in terms of light response, wavelength range, and array structure.
ACS APPLIED NANO MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Jiajun Chen, Yabing Shan, Jing Chen, Chen Chen, Huishan Wang, Jinkun Han, Xiaofei Yue, Mingsheng Xu, Haomin Wang, Wenzhong Bao, Laigui Hu, Ran Liu, Zhi-Jun Qiu, Chunxiao Cong
Summary: In this study, a five-particle positively charged biexciton in monolayer WSe2 is observed by achieving a high exciton density in the GaSe/WSe2 heterostructure with a type-I band alignment. The nature of this biexciton is confirmed through various photoluminescence measurements, and the mechanism of its formation is explained. The influence of charge transfer on the excitonic properties in the type-I band heterostructure is different from that in most TMDCs with type-II band alignments.
ACS APPLIED NANO MATERIALS
(2022)
Review
Chemistry, Multidisciplinary
Chuming Sheng, Xiangqi Dong, Yuxuan Zhu, Xinyu Wang, Xinyu Chen, Yin Xia, Zihan Xu, Peng Zhou, Jing Wan, Wenzhong Bao
Summary: The thin nature and exceptional electrical properties of 2D materials have attracted significant interest in circuit applications. Researchers have developed circuits based on wafer-level fabrication and monolithic integration in the laboratory. This review discusses the existing research on process integration, selection of suitable 2D materials, and recent circuit applications, highlighting their potential to compete with and outperform conventional devices.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Yin Xia, Xinyu Chen, Jinchen Wei, Shuiyuan Wang, Shiyou Chen, Simin Wu, Minbiao Ji, Zhengzong Sun, Zihan Xu, Wenzhong Bao, Peng Zhou
Summary: This study reports an improved chemical vapor deposition synthesis method for growing large-area high-quality 2D semiconductor films with fast and non-toxic growth, which has the potential to reduce manufacturing costs.
Proceedings Paper
Engineering, Electrical & Electronic
Xinyu Chen, Yangye Sun, Ling Tong, Simeng Zhang, Xiaoxi Li, Jingyi Ma, Xiaojiao Guo, Minxing Zhang, Zhengzong Sun, Wenzhong Bao
Summary: This work demonstrates the fabrication and characterization of large-area van der Waals heterostructure array composed of CVD grown 2H-MoTe2 and 2H-MoS2, showing excellent rectifier properties. The study also investigates the transfer characteristics of FETs, achieving homogeneity and high device performance, which advances the application of 2D materials in electronics.
2021 5TH IEEE ELECTRON DEVICES TECHNOLOGY & MANUFACTURING CONFERENCE (EDTM)
(2021)
Proceedings Paper
Engineering, Electrical & Electronic
Jingyi Ma, Ling Tong, Xiaojiao Guo, Xinyu Chen, Minxing Zhang, Chenjian Wu, Wenzhong Bao
Summary: The electrical properties of MoS2 transistors have been manipulated using metal gates with different work functions to modulate the threshold voltage, which is critical for optimizing the matching levels of electrical properties. The optimized inverters show controllable inverter threshold voltages and the obtained voltage gain is over 35.
2021 5TH IEEE ELECTRON DEVICES TECHNOLOGY & MANUFACTURING CONFERENCE (EDTM)
(2021)
Article
Materials Science, Multidisciplinary
Tian-Yu Wang, Jia-Lin Meng, Lin Chen, Hao Zhu, Qing-Qing Sun, Shi-Jin Ding, Wen-Zhong Bao, David Wei Zhang
Summary: This paper explores a 3D flexible memristors network fabricated via low-temperature atomic layer deposition, demonstrating its potential for high-density storage and neuromorphic computing. The network exhibits typical bipolar switching characteristics and multibit storage capability, enhancing storage density. The study indicates the significant potential of the 3D flexible memristors network in high-performance, high-density, and reliable wearable neuromorphic computing systems.