基于水热法制备三氧化钼纳米片的人工突触器件  

Artificial synapse based on MoO3 nanosheets prepared by hydrothermal synthesis

作　　者：郭科鑫 于海洋[1] 韩弘[1] 卫欢欢 龚江东 刘璐[1] 黄茜[1] 高清运[1] 徐文涛 Guo Ke-Xin;Yu Hai-Yang;Han Hong;Wei Huan-Huan;Gong Jiang-Dong;Liu Lu;Huang Qian;Gao Qing-Yun;Xu Wen-Tao(Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin,Institute of Photoelectronic Thin Film Devices and Technology of Nankai University,Tianjin 300350,China)

机构地区：[1]南开大学光电子薄膜器件与技术研究所,天津市光电子薄膜器件与技术重点实验室,天津300350

出　　处：《物理学报》2020年第23期286-292,共7页Acta Physica Sinica

基　　金：广东省重点领域研发项目(批准号:2018B030338001);天津市杰出青年科学基金(批准号:19JCJQJC61000);天津市自然科学基金(批准号:18JCYBJC16000);中央高校基本科研业务费(批准号:075-63191740,075-63191745)资助的课题.

摘　　要：近年来,在神经形态电子中,能够模拟突触功能的人工突触器件的研发引起了广泛关注.本文利用水热法制备出高比表面积的基于MoO3纳米片的薄膜,并将其用于人工突触器件的制备,成功模拟了如:突触后兴奋电流(EPSC)、双脉冲易化(PPF)、脉冲持续时间依赖可塑性(SDDP)、脉冲电压依赖可塑性(SVDP)及脉冲速率依赖可塑性(SRDP)等神经突触的重要功能.Recently,neuromorphic systems capable of parallel information processing have attracted increasing attention.A neuromorphic system is desired to emulate a human brain,which consists of hundreds of billions of neurons connected with even more synapses.Synapses are important connection parts between neurons to transmit information through release and reception of neurotransmitters.A neuromorphic system could replicate brain learning,cognition and computation of a human brain to process huge data with 10^16 floating point numbers per second.The high computing efficiency has attracted many researchers to study artificial synapses for application in future artificial intelligence.The synaptic weight could be adjusted by the received information.This provides a basis for the learning and computing capability of artificial synapses.So far,a number of semiconductor materials have been used in artificial synaptic devices,like some organic materials,e.g.Poly(3-hexylthiophene-2,5-diyl)(P3HT),[1]Benzothieno[3,2-b][1]benzothiophene,2,7-dioctyl-(C8-BTBT)etc,some inorganic oxides such as zinc oxide,indium zinc oxide(IZO),indium gallium zinc oxide(IGZO),transition metal oxides,etc,and two-dimensional materials,e.g.graphene,black phosphorus,and organic-inorganic hybrid perovskite materials.Among them,transition metal oxides are attractive due to their unique layered structure and inherent properties,which are important in photohydrolysis,lithium ion batteries,and field-effect transistors.MoO3,as a typical transition-metal oxide,has been used in artificial synaptic devices,with different preparation methods,such as mechanical exfoliation,chemical vapor deposition(CVD)and chemical vapor transportation(CVT),pulse-laser deposition(PLD).Here,we report the preparation of a semiconductor layer of MoO3 nanosheets by hydrothermal method,and the use of a TiO2 nanoparticle seed layer to improve the adhesion of MoO3 nanosheets.This is a cost-effective and controllable process.The high surface-to-volume ratio of the material provides large co

关 键 词：人工突触 水热合成 三氧化钼纳米片 突触可塑性 

分 类 号：TN303[电子电信—物理电子学] Q811[生物学—生物工程]