Intrinsically ionic conductive nanofibrils for ultra-thin bio-memristor with low operating voltage  

基于本征离子导电的纳米微纤构筑低工作电压的超薄生物忆阻器

作　　者：Yi Zhang Suna Fan Qianqian Niu Fang Han Yaopeng Zhang 张艺;范苏娜;牛欠欠;韩芳;张耀鹏(State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,College of Materials Science and Engineering,Donghua University,Shanghai 201620,China;College of Information Science and Technology,Donghua University,Shanghai 201620,China)

机构地区：[1]State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,College of Materials Science and Engineering,Donghua University,Shanghai 201620,China [2]College of Information Science and Technology,Donghua University,Shanghai 201620,China

出　　处：《Science China Materials》2022年第11期3096-3104,共9页中国科学（材料科学（英文版）

基　　金：supported by the National Natural Science Foundation of China(51903045 and 52173031);the International Cooperation Fund of the Science and Technology Commission of Shanghai Municipality(19520744500);the Basic Research Project of the Science and Technology Commission of Shanghai Municipality(21JC1400100);Shanghai Rising-Star Program(22QA1400400);the Program of Shanghai Academic/Technology Research Leader(20XD1400100);the Fundamental Research Funds for the Central Universities and Graduate Student Innovation Fund of Donghua University(CUSF-DH-D-2020049)。

摘　　要：Memristors integrated with low operating voltage,good stability,and environmental benignity play an important role in data storage and logical circuit technology,but their fabrication still faces challenges.This study reports an ultra-thin bio-memristor based on pristine environmentfriendly silk nanofibrils(SNFs).The intrinsic ionic conductivity,combined with high dielectric performance and nanoscale thickness,lowers the operation voltage down to0.1-0.2 V,and enables stable switching and retention time over 180 times and 10^(5)s,respectively.Furthermore,the SNFbased memristor device in a crossbar array achieves stable memristive performance,and thus realizes the functions of memorizing image and logic operation.By carrying out variable-temperature electrical experiments and Kelvin probe force microscopy,the space charge-limited conduction mechanism is revealed.Integrating with low operating voltage,good stability,and ultra-thin thickness makes the SNF-based memristors excellent candidates in bioelectronics.兼具低工作电压、良好稳定性及环境友好性的忆阻器在数据存储和逻辑电路领域具有重要的作用,但其制备依然是一个较大的挑战.本研究报告了一种基于纯丝素纳米微纤(SNFs)的超薄生物忆阻器.丝素纳米微纤的本征离子导电性、高介电性能及纳米级的厚度,可将忆阻器的工作电压降低至0.1-0.2 V,并使其实现了超过180次的稳定电阻切换及10^(5)s的阻态保持时间.此外,基于SNFs的忆阻交叉阵列具备稳定的忆阻性能,实现了图像记忆和逻辑运算功能.电学变温实验和开尔文探针力显微镜的测试结果表明,忆阻器的工作机制为空间电荷限制传导(SCLC)机制.SNFs基忆阻器的低工作电压、良好的稳定性和超薄厚度有望使其成为理想的生物电子器件.

关 键 词：silk nanofibrils bio-memristor intrinsic ionic conductivity low operating voltage logic operation 

分 类 号：TN60[电子电信—电路与系统] TB383.1[一般工业技术—材料科学与工程]