Article
Materials Science, Multidisciplinary
Ruibo Ai, Wang Luo, Xiaojun Liu
Summary: The resistive switching behaviors of cobalt oxide (CoO) were demonstrated, showing rectifier characteristics and analog bipolar resistive switching behavior. The simulation of synapse characteristics and behaviors, as well as the potential for electronic synapse function development, make this memristor promising for future applications.
Article
Chemistry, Physical
Jiejun Wang, Xinqiang Pan, Qiang Wang, Wenbo Luo, Yao Shuai, Qin Xie, Huizhong Zeng, Gang Niu, Chuangui Wu, Wanli Zhang
Summary: This study reports on a memristor based on Ar+-irradiated single-crystalline LiNbO3 thin film, which exhibits reliable self-rectifying resistive switching behaviors and abundant synaptic plasticity characteristics.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Minsu Park, Jongmin Park, Sungjun Kim
Summary: In this work, the switching mechanisms of Ni/SiOx/ITO devices before and after reversible switching were studied, and their application in neuromorphic computing systems was investigated. Different electrical measurements and behaviors were observed in the RRAM devices, which were attributed to a change in the switching mechanisms induced by reversible switching in negative polarity. The identified electrical features were further used to implement neural networks.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Physics, Applied
Yueyue Tang, Peixian Lei, Kanghong Liao, Ting Jiang, Siyi Chen, Qin Xie, Wenbo Luo, Yuda Zhao, Wenjing Jie
Summary: Nonvolatile resistive switching behavior has been achieved in 2D InSe nanosheets through controllable oxidation, leading to the formation of In2O3 and increased insulating characteristic. The fabricated memristor exhibit good retention property and endurance performance, enriching the family of 2D materials for next-generation nonvolatile memory applications.
APPLIED PHYSICS LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Nasir Ilyas, Jingyong Wang, Chunmei Li, Hao Fu, Dongyang Li, Xiangdong Jiang, Deen Gu, Yadong Jiang, Wei Li
Summary: A STO:Ag/SiO2 bilayer based memristor has been developed to exhibit filamentary resistive switching with stable endurance and long-term data retention, and tunable resistance modulation to mimic potentiation and depression behavior of biological synapses. The controlled formation and rupture of Ag filaments are responsible for resistive switching, showing a switching ratio of around 10(3) with good endurance and stability suitable for nonvolatile memory applications. The memristor has potential applications in synaptic plasticity functions and neuromorphic computing.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Physical
Kaijin Kang, Wei Hu, Xiaosheng Tang
Summary: This Perspective provides a condensed overview of halide perovskite RRAMs, including materials, device performance, switching mechanism, and potential applications. The challenges of halide perovskite films, device fabrication, memory performance reliability, and understanding of switching mechanism are discussed, along with potential paths for future research.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Mei Er Pam, Sifan Li, Tong Su, Yu-Chieh Chien, Yesheng Li, Yee Sin Ang, Kah-Wee Ang
Summary: This study demonstrates a facile approach to transform an inactive rhenium disulfide (ReS2) into an effective switching material through interfacial modulation induced by molybdenum-irradiation (Mo-i) doping. The results show that ReS2 of various thicknesses can be switchable by modulating the Mo-irradiation period. The fabricated device exhibits bipolar non-volatile switching, programmable multilevel resistance states, and long-term synaptic plasticity. Additionally, it achieves a high MNIST learning accuracy of 91% under a non-identical pulse train.
ADVANCED MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Qi Xue, Tao Hang, Jianghu Liang, Chun-Chao Chen, Yunwen Wu, Huiqin Ling, Ming Li
Summary: This study proposed a new strategy to fabricate Mn-ZnO-based memristors on flexible substrates using a combustion method, achieving stable bipolar resistive switching behavior and demonstrating advantages of high performance, multilevel storage, and uniform resistance distribution.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Review
Nanoscience & Nanotechnology
Markus Hellenbrand, Judith MacManus-Driscoll
Summary: This paper summarizes the progress of multi-level resistive switching in hafnium-oxide-based devices for neuromorphic applications and highlights the current status, open questions, and recommendations for future work.
Article
Materials Science, Multidisciplinary
Chandreswar Mahata, Muhammad Ismail, Dae Hwan Kim, Sungjun Kim
Summary: The reliable resistive switching performance of nanocrystalline-HfO2 in amorphous-HfOx has been demonstrated in the TaN/nc-HfO2/ITO memristor structure. The presence of nc-HfO2 and non-stoichiometric HfOx in the switching layer was confirmed using TEM and XPS. The narrowing of conductive filaments in an atomic scale under the influence of nc-HfO2 allows for the control of quantized conductance. Different current compliance and RESET stop voltages were found to enhance the resistive switching performances with multilevel resistance states behavior.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Nanoscience & Nanotechnology
Xuelian Zhang, Haohan Chen, Siqi Cheng, Feng Guo, Wenjing Jie, Jianhua Hao
Summary: This study investigates the resistive switching characteristics, synaptic functions, and neuromorphic computing of memristors based on two-dimensional MXene Ti3C2 nanosheets. The results show that both digital and analog resistive switching behaviors can coexist in these memristors depending on the magnitude of operation voltage. Additionally, the artificial synapses based on these memristors exhibit basic synaptic functions and successfully emulate the learning-forgetting experience. Moreover, the artificial synapses can be used to construct an artificial neural network for image recognition.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Yunseok Lee, Jiung Jang, Beomki Jeon, Kisong Lee, Daewon Chung, Sungjun Kim
Summary: This study demonstrates stable switching using AlSiOx as an alloyed insulator, evaluating the retention and endurance of multi-level cells through resistive switching characteristics analysis, and simulating the potentiation/depression curves of a neuromorphic device.
Article
Materials Science, Multidisciplinary
Yewon Lee, Jiwoong Shin, Giyeong Nam, Daewon Chung, Sungjoon Kim, Joonhyeon Jeon, Sungjun Kim
Summary: In this study, stable resistive switching characteristics were demonstrated in an atomic-layer-deposited SiOX-based resistive memory device. The thickness and chemical properties of the Pt/SiOX/TaN stack were verified, and it was shown that negative set and positive reset achieved better resistive switching. Additionally, multi-level switching and synaptic behavior were emulated by adjusting the compliance current and reset stop voltage.
Article
Nanoscience & Nanotechnology
Xiao-Dong Li, Bai-Qian Wang, Nian-Ke Chen, Xian-Bin Li
Summary: The non-volatile resistive switching process of a MoS2 based atomristor with a vertical structure is investigated. The monolayer MoS2 with a S vacancy defect (V-S) can maintain insulation characteristics and a high resistance state (HRS) is remained. By adsorbing an electrode metal atom on the MoS2 monolayer, a semi-conductive filament is formed with the assistance of V-S, resulting in a low resistance state (LRS). The investigation provides atomic level understanding of the resistive switching properties and can be applied to atomristors based on other monolayer transition-metal dichalcogenides.
Review
Chemistry, Multidisciplinary
Guiming Cao, Peng Meng, Jiangang Chen, Haishi Liu, Renji Bian, Chao Zhu, Fucai Liu, Zheng Liu
Summary: This article provides a comprehensive review of synaptic devices based on 2D materials, including their advantages, challenges, and future development strategies.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Review
Chemistry, Multidisciplinary
Yi Wei, Wei Wang, Zhennan Wang, Hang Yang, Xinyu You, Yunna Zhao, Peipei Dang, Hongzhou Lian, Jianhua Hao, Guogang Li, Jun Lin
Summary: This review highlights the applications and properties of Bi3+-included lead-free metal halide materials in the field of optoelectronics, with a focus on the role and impact of Bi3+ ions in LFMH materials.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Biophysics
Menglin Song, Man-Chung Wong, Lihua Li, Feng Guo, Yuan Liu, Yingjing Ma, Xinyue Lao, Pui Wang, Honglin Chen, Mo Yang, Jianhua Hao
Summary: We have developed a point-of-care upconversion luminescence diagnostics (PULD) method combined with a streamlined smartphone-based portable platform for rapid testing of the SARS-CoV-2 nucleocapsid (N) gene. This method demonstrates high sensitivity and signal-to-noise ratio, and can accurately identify positive COVID-19 samples.
BIOSENSORS & BIOELECTRONICS
(2023)
Article
Chemistry, Physical
Fumei Yang, Man-Chung Wong, Jianfeng Mao, Zehan Wu, Jianhua Hao
Summary: In this study, high-quality multilayer SnSe nanosheets were synthesized by chemical vapor deposition and their piezoelectric properties were investigated. The results showed that SnSe nanosheets have high single-crystallinity and strong layer-dependent piezoelectric coefficient, allowing for high energy conversion efficiency and maximum power density. Based on this study, a self-powered sensor for human motion monitoring was developed.
Article
Nanoscience & Nanotechnology
Wei Han, Xiaodong Zheng, Ke Yang, Chi Shing Tsang, Fangyuan Zheng, Lok Wing Wong, Ka Hei Lai, Tiefeng Yang, Qi Wei, Mingjie Li, Weng Fu Io, Feng Guo, Yuan Cai, Ning Wang, Jianhua Hao, Shu Ping Lau, Chun-Sing Lee, Thuc Hue Ly, Ming Yang, Jiong Zhao
Summary: Large-scale 2D beta-In2Se3 films and alpha-In2Se3 films were successfully grown by chemical vapor deposition, and a complete phase transition enabled the obtainment of a full spectrum of paraelectric, ferroelectric and antiferroelectric 2D films.
NATURE NANOTECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Tianhong Zhou, Haisheng Chen, Jiaxing Guo, Yanan Zhao, Xiaona Du, Qingyi Zhang, Wenwen Chen, Taiyu Bian, Zhi Zhang, Jiaying Shen, Weiwei Liu, Yang Zhang, Zhenping Wu, Jianhua Hao
Summary: This study extends the research on mechanoluminescence (ML) into the high-frequency range by combining with piezoelectric actuators. Time-resolved ML of ZnS:Mn and ZnS:Cu, Al reveals frequency-dependent saturation and quenching associated with dynamic processes of traps. Furthermore, ZnS:Mn exhibits reversible frequency-induced broad red-shift into the near-infrared range by in-situ tuning the strain frequency.
Article
Multidisciplinary Sciences
Qingyi Zhang, Ning Li, Tao Zhang, Dianmeng Dong, Yongtao Yang, Yuehui Wang, Zhengang Dong, Jiaying Shen, Tianhong Zhou, Yuanlin Liang, Weihua Tang, Zhenping Wu, Yang Zhang, Jianhua Hao
Summary: By lattice and band engineering, Zhang et al. constructed a unipolar barrier avalanche photodiode with suppressed dark current and reinforced reverse breakdown. Ga2O3-based solar blind avalanche photodetectors exhibit low voltage operation, optical filter-free and monolithic integration of photodetector arrays, and therefore they are promising to be an alternative to the bulky and fragile photomultiplier tubes for weak signal detection in deep-ultraviolet region. These findings provide insights into precise manipulation of band alignment in avalanche photodetectors, and also offer exciting opportunities for further developing high-performance Ga2O3-based electronics and optoelectronics.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Shuo Shi, Yifan Si, Zihua Li, Shuo Meng, Shuai Zhang, Hanbai Wu, Chuanwei Zhi, Weng-Fu Io, Yang Ming, Dong Wang, Bin Fei, Haitao Huang, Jianhua Hao, Jinlian Hu
Summary: Developing intelligent wearable protection systems is highly important for human health engineering. We have developed an intelligent wearable filtration system (IWFS) using advanced nanotechnology and machine learning, which exhibits reliable filtration efficiency, low pressure drop, healthcare monitoring function, and man-machine interactive capability. The IWFS has a high particle filtration efficiency of 99%, bacteria protection efficiency of 100%, and low-pressure drop of 5.8 mmH2O. It also possesses healthcare monitoring function and man-machine interactive capability, enabling real-time data collection and voice command transmission.
Article
Physics, Applied
Yuqian Zhao, Feng Guo, Sin-Yi Pang, Weng Fu Io, Lok-Wing Wong, Jiong Zhao, Jianhua Hao
Summary: The anisotropic Raman response of ultrathin black phosphorus (BP) transferred to an oxide dielectric substrate is investigated by utilizing a piezoelectric actuator to perform biaxial strain engineering. The strained Raman response is related to the variations of bond angle and bond length in BP, and biaxial strain modulation can change the anisotropic dispersion of BP.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Zhaoying Dang, Feng Guo, Huan Duan, Qiyue Zhao, Yuxiang Fu, Wenjing Jie, Kui Jin, Jianhua Hao
Summary: In this study, ferroelectric-tuned synaptic transistors were designed by integrating 2D black phosphorus with a flexible ferroelectric copolymer. These transistors exhibited high mobility, low energy consumption, and reliable synaptic behaviors, such as paired-pulse facilitation and long-term depression/potentiation. Furthermore, an artificial neural network was successfully simulated for handwritten digit recognition with a high accuracy of 93.6%. These findings highlight the potential of 2D ferroelectric field-effect transistors as ideal building blocks for high-performance neuromorphic networks.
Article
Chemistry, Multidisciplinary
Xinyue Lao, Yuan Liu, Lihua Li, Menglin Song, Yingjin Ma, Mo Yang, Guanying Chen, Jianhua Hao
Summary: This study presents an ultrasensitive biosensor based on core-shell upconversion nanoparticles and gold nanoparticles for accurate detection of SARS-CoV-2 viral RNA. The integration of FRET and surface plasmon greatly enhances the sensitivity of the biosensor, which has been validated using clinical samples.
Article
Nanoscience & Nanotechnology
Lihua Li, Zefeng Lin, Xingyi Xu, Wanshun Wang, Hu Chen, Zhibin Feng, Zhongmin Yang, Jianhua Hao
Summary: A self-enhanced catalytic nanocrystal BDS-GOx@MnOx based on a bismuth-manganese core-shell nanoflower was designed for 4T1 tumor theranostics in vitro and in vivo. The BDS-GOx@MnOx nanozymes enable enhanced starvation treatment (ST) and chemotherapy (CDT) with high efficacy and exhibit sensitive tumor microenvironment (TME) responsive character for tumor therapy as well as for tumor-enhanced computer tomography (CT) and magnetic resonance (MR) diagnostic imaging.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Wei Xu, Hongzhen Liu, Man-Chung Wong, Huimin He, Jianhua Hao, Lizhi Xu
Summary: The researchers have used a mechanically strong and mildly healable polymer (THP) as the key material for triboelectric nanogenerators (TENGs). THP is based on polyurethane-urea containing coordinate bonds, and its healing can be triggered by simply wetting the breakage area. The THP-TENGs exhibit high enough robustness to withstand mechanical loading and excellent healability for recovering device functionalities after mechanical damage.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Multidisciplinary
Feng Guo, Weng Fu Io, Zhaoying Dang, Ran Ding, Sin-Yi Pang, Yuqian Zhao, Jianhua Hao
Summary: Currently, most three-terminal neuromorphic devices only have an active gate terminal, limiting the implementation of complex neural behaviors and brain-like thinking strategies. In this study, we utilize the unique co-existing in-plane and out-of-plane ferroelectricity in 2D & alpha;-In2Se3 to create a three-active-terminal neuromorphic device with each terminal capable of modulating conductance. Through the cooperative mode, we achieve control of food intake as a complex nervous system-level behavior and implement reinforcement learning using the coupling effect between polarizations in different directions. The practicality of three-active-terminal neuromorphic devices in handling complex tasks and their potential for implementing brain-like learning strategies are demonstrated.
MATERIALS HORIZONS
(2023)
Review
Chemistry, Physical
Xiao Han, Xueyuan Qiu, Meng Zong, Jianhua Hao
Summary: As an emerging family of 2D nanomaterials, early transition metal carbides and carbonitrides (MXenes) have shown great potential in various applications. Research on MXene-based polymer nanocomposites has gained increasing attention due to their improved oxidation and damage tolerance. MXenes can enhance the mechanical properties and provide desired thermal/electrical properties to polymer. The assembly of MXene nanosheets into MXene macrostructures (MMs) is an effective strategy to optimize the performance of the nanocomposites. This review summarizes recent research progress on MMs/polymer nanocomposites, focusing on the relationships among structures, fabrication techniques, and performance. It also discusses the applications of these nanocomposites in heat/electrical conduction, electromagnetic shielding, and flexible devices. Challenges and future perspectives for multifunctional MMs/polymer nanocomposites are also highlighted.
Article
Chemistry, Multidisciplinary
Huan Duan, Dehui Wang, Jingxi Gou, Feng Guo, Wenjing Jie, Jianhua Hao
Summary: This study fabricates two-terminal memristors based on two-dimensional MoSe2 nanosheets, which exhibit analog resistive switching (RS) behaviors and can simulate the synaptic plasticity of the human brain. The fabricated memristors successfully implement synaptic functions and achieve a high recognition accuracy of 92% in image recognition tasks. They can also emulate the learning-forgetting experience of the human brain and recognize noxious stimuli as artificial nociceptors. This research provides comprehensive investigations and promising prospects for neuromorphic computing based on 2D MoSe2 nanosheets.