Article
Chemistry, Physical
Mengmeng Jia, Jinran Yu, Yudong Liu, Pengwen Guo, Ying Lei, Wei Wang, Aifang Yu, Yaxing Zhu, Qijun Sun, Junyi Zhai, Zhong Lin Wang
Summary: This study introduces a new multibit tribotronic nonvolatile memory based on a graphene/hexagonal boron nitride/molybdenum disulfide van der Waals heterostructure and triboelectric nanogenerator, showing promising performance in modulation of programming/erasing states through external mechanical actions, long retention time, stable switching behavior, and multilevel data storage capability. Additionally, a memory inverter circuit utilizing the triboelectric potential as input signals demonstrates the potential of tribotronic devices for various applications in human-robot interactions, self-powered wearable devices, and intelligent instrumentation.
Article
Chemistry, Multidisciplinary
Wenxiang Wang, Jiyou Jin, Yanrong Wang, Zheng Wei, Yushi Xu, Zhisheng Peng, Hui Liu, Yu Wang, Jiawang You, Julienne Impundu, Qiang Zheng, Yong Jun Li, Lianfeng Sun
Summary: A floating-gate memory based on van der Waals heterostructure is utilized, demonstrating a large storage window ratio (>75.5%), an extremely high on/off ratio (10^7), and an ultrafast electrical writing/erasing speed (40 ns). These enhanced performance characteristics enable excellent multilevel data storage, robust retention, and endurance performance. Stable optical erasing operations can also be achieved by illuminating the device with a laser pulse, showcasing outstanding optoelectronic storage performance (optical erasing speed >2.3 ms). The nonvolatile and high-speed characteristics of these devices hold significant potential for the integration of high-performance nonvolatile memory.
Article
Chemistry, Physical
Jing Zhao, Zheng Wei, Xixi Yang, Guangyu Zhang, Zhonglin Wang
Summary: The novel MoS2 nonvolatile memory combined with nanographene as floating gate enables multilevel storage state triggered by both mechanical and optical stimulation without needing extra gate voltages. The device demonstrates high programming/erasing current ratio, performance stability over cycles, and retention time exceeding 105 seconds. The extremely high photoresponsivity of MoS2 optical memory and stable flexibility make it feasible for integrated devices in wearable applications.
Article
Materials Science, Multidisciplinary
Yilin Sun, Mingjie Li, Yingtao Ding, Huaipeng Wang, Han Wang, Zhiming Chen, Dan Xie
Summary: In this study, a programmable optoelectronic synaptic floating-gate transistor based on multilayer graphene/h-BN/MoS2 van der Waals heterostructures was demonstrated. The device achieved both plasticity emulation and modulation, and had a large memory ratio between program and erase states due to the dynamic tunneling process of photogenerated carriers. By applying a program/erase voltage spike, the device could function as a functional or silent synapse, providing programmable operation in optoelectronic synaptic transistors. The program state also resulted in ultra-low energy consumption per light spike event.
Article
Chemistry, Multidisciplinary
Jiaqiang Li, Zhicheng Zhang, Ya Kong, Binwei Yao, Chen Yin, Lianming Tong, Xudong Chen, Tongbu Lu, Jin Zhang
Summary: A new strategy for preparing GDY film was proposed, leading to the successful fabrication of a GDY optoelectronic memory with multi-bit storage capability, showing excellent charge storage and photoresponse. The device exhibits over 256 distinct storage levels, with signal-to-noise ratios greater than 100, and demonstrates robust bending stability.
Article
Chemistry, Multidisciplinary
Jialing Wen, Wenhui Tang, Zhuo Kang, Qingliang Liao, Mengyu Hong, Junli Du, Xiankun Zhang, Huihui Yu, Haonan Si, Zheng Zhang, Yue Zhang
Summary: This study introduces a new memory design using 2D graphdiyne as the charge-trapping layer, achieving a bilayer memory GDY/MoS2 with a large memory window and high degree of modulation. It demonstrates data storage capability in different operating modes, showcasing the potential for high-performance dielectric-free electronics and applications such as optical memories and artificial synaptic.
Article
Nanoscience & Nanotechnology
Cheng-Han Ho, Yan-Cheng Lin, Wei-Chen Yang, Ender Ercan, Yun-Chi Chiang, Bi-Hsuan Lin, Chi-Ching Kuo, Wen-Chang Chen
Summary: With the increasing amount of data generated, the demand for photomemory capable of multibit data storage has grown rapidly to improve storage capacity. A study focused on developing an organic-molecule-based electret with an elaborate nanostructure to enable multibit data storage in a stable memory device. The researchers synthesized a series of star-shaped rod-coil molecules and investigated their molecular architecture-morphology relationships. They found that the memory devices based on these rod-coil molecules exhibited high memory ratios and rapid multilevel photoresponses, attributed to the favorable energy-level alignment, isolated nanostructure, and face-on orientation of one specific molecule. This study provides a new strategy for designing high-performance phototransistor memory by tailoring nanostructures in organic-molecule-based electrets using a star-shaped rod-coil architecture.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Shuhui Zhang, Yuanyuan Wang, Shuhua Wang, Baibiao Huang, Ying Dai, Wei Wei
Summary: The study demonstrates novel electronic properties of Janus TiClI materials, showing valley spin splitting and large valley polarization. Additionally, TiClI bilayers exhibit semiconductormetal transitions in different stacking structures, with doping concentration tunable by altering the interlayer distance.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Mohammad Amini, Orlando J. Silveira, Viliam Vano, Jose L. Lado, Adam S. Foster, Peter Liljeroth, Shawulienu Kezilebieke
Summary: 2D ferroelectric materials are promising for electrical control of quantum states, and can influence the quantum states of deposited molecules due to their 2D nature. This study reports electrically controllable molecular states in phthalocyanine molecules adsorbed on monolayer ferroelectric material SnTe. The strain and ferroelectric order in SnTe create a transition between two distinct orbital orders in the adsorbed phthalocyanine molecules. The polarization of the ferroelectric domain can be manipulated electrically, providing a starting point for ferroelectrically switchable molecular orbital ordering and ultimately, electrical control of molecular magnetism.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Hao Wu, Yinghao Cui, Jinlong Xu, Zhong Yan, Zhenda Xie, Yonghong Hu, Shining Zhu
Summary: In this study, a multifunctional electronic device based on two-dimensional heterostructure was successfully designed and fabricated, which integrates logic operations, data storage, and rectification functions, providing inspiration for the design of next-generation computation beyond the von Neumann architecture.
Article
Nanoscience & Nanotechnology
Yi-Ying Lu, Yu-Ting Peng, Yan-Ting Huang, Jia-Ni Chen, Jie Jhou, Liang-Wei Lan, Shi-Hao Jian, Chien-Cheng Kuo, Shang-Hsien Hsieh, Chia-Hao Chen, Raman Sankar, Fang-Cheng Chou
Summary: This study presented a nonvolatile memory structure with multilevel data storage using a van der Waals gate architecture and charge-trapping sites on an InSe interface, showing potential applications for nonvolatile memory technology.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Qingyue Zhang, Qiang Bai, Enlin Cai, Linhong Hao, Maorong Wang, Shuaiyi Zhang, Qiuling Zhao, Lihua Teng, Ning Sui, Fanglin Du, Xia Wang
Summary: The construction of van der Waals heterostructures (vdWHs) is a promising approach for creating new materials with exotic functionalities and extraordinary optical properties in the field of laser modulations. This paper investigates the optical nonlinearities of graphdiyne/graphene vdWH (GDY/G) and demonstrates its potential for pulse laser generation and spatial self-phase modulation (SSPM). The experimental results show that GDY/G possesses larger potentials and brighter prospects in laser modulations.
RESULTS IN PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Boyao Cui, Jun Han, Yanhui Xing, Weiming Lv, Ting Lei, Haixin Ma, Zhongming Zeng, Baoshun Zhang
Summary: SnS2 exhibits high absorbance coefficient and strong photoconductive properties in the ultraviolet-visible regions, making it a promising photodetector. The vertical graphene/SnS2 van der Waals heterostructure photodetector combines the characteristics of high yield of photocarriers in SnS2 with high mobility of graphene, resulting in effective electron-hole pairs separation and high photoresponse under built-in electric field. The heterostructures show ultrahigh responsivity and high external quantum efficiency under 365 nm light, indicating potential applications in future optoelectronic devices.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Zegao Wang, Xuya Xiong, Jiheng Li, Mingdong Dong
Summary: By introducing an rGO buffer layer in MoS2 transistors, van der Waals contacts can be formed effectively, leading to a significant improvement in device performance.
MATERIALS TODAY PHYSICS
(2021)
Article
Nanoscience & Nanotechnology
Jiyou Jin, Zhongpu Wang, Zhisheng Peng, Hui Liu, Kang Peng, Haonan Wei, Yu Wang, Yushi Xu, Hang Wei, Weiguo Chu, Yong Jun Li, Lianfeng Sun
Summary: Researchers have successfully achieved stable polarization control of 2D ferroelectric materials through van der Waals heterostructures, demonstrating their potential applications as high-performance memory, rectifiers, and field-effect transistors.
ADVANCED ELECTRONIC MATERIALS
(2022)
Review
Chemistry, Multidisciplinary
Man Hou, Yong Xia Shi, Jun Jun Li, Zengqiang Gao, Zhicheng Zhang
Summary: This review systematically summarizes the research advances of various Cu-based organic-inorganic composite materials in CO2RR, discusses the synthesis strategies, structure-performance relationship, and catalytic mechanisms, and proposes the opportunities and challenges in this field.
CHEMISTRY-AN ASIAN JOURNAL
(2022)
Article
Engineering, Mechanical
Shaoping Chang, Yijing Wang, Zhiqiang Zuo, Zhicheng Zhang, Hongjiu Yang
Summary: This paper proposes a fast finite-time extended state observer (FFTESO) for a type of nonlinear systems, which can estimate the states and disturbances effectively. Compared with traditional methods, the proposed FFTESO has a faster convergence rate and better performance, which is validated by experimental results.
NONLINEAR DYNAMICS
(2022)
Article
Multidisciplinary Sciences
Yuan Li, Zhi Cheng Zhang, Jiaqiang Li, Xu-Dong Chen, Ya Kong, Fu-Dong Wang, Guo-Xin Zhang, Tong-Bu Lu, Jin Zhang
Summary: The use of graphdiyne oxide as a threshold switching layer in a floating gate memory enables ultrafast operation and low energy consumption.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Lu Wang, Zhenxing Wang, Huan Li, Daliang Han, Xing Li, Feifei Wang, Jiachen Gao, Chuannan Geng, Zhicheng Zhang, Changjun Cui, Zhe Weng, Chunpeng Yang, Kian Ping Loh, Quan-Hong Yang
Summary: The deposition behavior of Zn metal anodes in aqueous Zn batteries can be regulated using an aminosilane molecular layer, resulting in dendrite-free Zn metal anodes. This is achieved through a capture-diffusion-deposition process of Zn ions, induced by the aminosilane molecular layer, which promotes reversible Zn stripping/plating and leads to smooth and compact Zn electrodeposited layers. The aminosilane-modified Zn anode exhibits high Coulombic efficiency, long lifespan, and high capacity retention in full cells, making it a promising solution for practical Zn batteries and providing insights into interface modification for other metallic anodes at the molecular level.
Article
Chemistry, Physical
Shaofei Zhang, Jing Guo, Tiantian Li, Jinfeng Sun, Yongqiang Meng, Jianli Kang, Linli Tan, Zhijia Zhang
Summary: In this study, a series of high-entropy alloy electrodes with large-scale and flexible surfaces were prepared using modified preparation methods. These electrodes exhibited impressive oxygen evolution performance with low overpotential and high Tafel slope, indicating a new prospect for the design of large-scale self-supported electrodes.
APPLIED SURFACE SCIENCE
(2023)
Editorial Material
Chemistry, Multidisciplinary
Zhicheng Zhang, Zhen Zhang, Zhenyu Sun, Shaoqi Zhan, Guoxiong Wang
Summary: Surface and interface engineering is a promising approach to enhance catalyst performance in CO2 reduction. The guest editors give an overview of this field and highlight the state-of-the-art contributions in this special collection in their editorial.
CHEMISTRY-AN ASIAN JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Zhiqiang Zuo, Jiewen Ji, Zhicheng Zhang, Yijing Wang, Wentao Zhang
Summary: In this paper, the consensus issue of continuous-time first-order multi-agent systems (MASs) subject to asymmetric input saturation under the directed graph containing a directed spanning tree is investigated. A fully distributed consensus protocol is proposed, and a necessary and sufficient criterion for guaranteeing the global consensus is given. The above findings are extended to the discrete-time case, and simulation examples verify the effectiveness of the proposed strategy.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2023)
Review
Materials Science, Multidisciplinary
Zhi-Cheng Zhang, Xu-Dong Chen, Tong-Bu Lu
Summary: Graphdiyne (GDY) is an emerging two-dimensional carbon allotrope with a direct bandgap and interesting physical and chemical properties, which shows great potential in catalysis, energy conversion and storage, and electronic/optoelectronic devices. Recent breakthroughs in the synthesis of large-area, high-quality GDY films have enabled the development of high-performance electrical devices based on GDY.
SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS
(2023)
Article
Multidisciplinary Sciences
Guo-Xin Zhang, Zhi-Cheng Zhang, Xu-Dong Chen, Lixing Kang, Yuan Li, Fu-Dong Wang, Lei Shi, Ke Shi, Zhi-Bo Liu, Jian-Guo Tian, Tong-Bu Lu, Jin Zhang
Summary: This research develops retinomorphic vision sensors with nonvolatile tunable responsivity using an ion-induced localized-field strategy, and constructs a complete neuromorphic visual system with front-end in-sensor computing and back-end in-memory computing.
Article
Chemistry, Multidisciplinary
Fu-Dong Wang, Mei-Xi Yu, Xu-Dong Chen, Jiaqiang Li, Zhi-Cheng Zhang, Yuan Li, Guo-Xin Zhang, Ke Shi, Lei Shi, Min Zhang, Tong-Bu Lu, Jin Zhang
Article
Chemistry, Multidisciplinary
Fu-Dong Wang, Mei-Xi Yu, Xu-Dong Chen, Jiaqiang Li, Zhi-Cheng Zhang, Yuan Li, Guo-Xin Zhang, Ke Shi, Lei Shi, Min Zhang, Tong-Bu Lu, Jin Zhang
Summary: In this research, a flexible dual-mode memristor array based on core-shell CsPbBr3@graphdiyne nanocrystals is proposed, featuring high transition yield and stability, which can simplify the fabrication and integration of fully memristive neuromorphic systems.
Review
Chemistry, Physical
Yongxia Shi, Man Hou, Junjun Li, Li Li, Zhicheng Zhang
Summary: Large amounts of CO2 gas have been emitted into the atmosphere through human activities, causing environmental problems. Developing and utilizing renewable clean energy is crucial to reduce CO2 emission. Electrochemical CO2 reduction reaction (CO2RR) is considered an effective approach to obtain valuable chemicals and fuels. Copper has been proven to be the only catalyst that can efficiently reduce CO2 to hydrocarbons and oxygenates. However, pure Cu has limitations for industrial-scale production. Cu-based tandem catalysts are a promising strategy for improving CO2RR performance.
ACTA PHYSICO-CHIMICA SINICA
(2022)
Article
Chemistry, Physical
Junjun Li, Zhicheng Zhang, Wenping Hu
Summary: Electrochemical CO2 reduction reaction (CO2RR) is an appealing approach to convert emitted CO2 to value-added chemicals and fuels. Formic acid (HCOOH) has been considered as a promising liquid hydrogen storage material. However, the reported catalysts have failed to meet the requirements for industrialized feasibility of CO2RR. In contrast, Cu-based catalysts show excellent activity and low cost. A recent study has developed a single-atom alloy strategy for exclusive CO2-to-formate conversion over Cu-based catalysts, providing a prospect for industrial production of HCOOH from CO2.
GREEN ENERGY & ENVIRONMENT
(2022)
