journal article·2021-01-13

Self-Assembled Peptide Nanofibers with Voltage-Regulated Inverse Photoconductance

Huiyao Shi, Minglin Li, Jialin Shi, Dindong Zhang, Zhen Fan, Mingjun Zhang, Lianqing Liu

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Abstract

Inverse photoconductance is an uncommon phenomenon observed in selective low-dimensional materials, in which the electrical conductivity of the materials decreases under light illumination. The unique material property holds great promise for biomedical applications in photodetectors, photoelectric logic gates, and low-power nonvolatile memory, which remains a daunting challenge. Especially, tunable photoconductivity for biocompatible materials is highly desired for interfacing with biological systems but is less explored in organic materials. Here, we report nanofibers self-assembled with cyclo-tyrosine-tyrosine (cyclo-YY) having voltage-regulated inverse photoconductance and photoconductance. The peptide nanofibers can be switched back and forth by a bias voltage for imitating biological sensing in artificial vision and memory devices. A peptide optoelectronic resistive random access memory (PORRAM) device has also been fabricated using the nanofibers that can be electrically switched between long-term and short-term memory. The underlying mechanism of the reversible photoconductance is discussed in this paper. Due to the inherent biocompatibility of peptide materials, the reversible photoconductive nanofibers may have broad applications in sensing and storage for biotic and abiotic interfaces.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Supramolecular Self-Assembly in Materials · Advanced biosensing and bioanalysis techniques · Photoreceptor and optogenetics research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, China

Institutes for Robotics and Intelligent Manufacturing, Chinese Academy of Sciences, Shenyang 110169, China

University of Chinese Academy of Sciences, Beijing 100049, China

Fujian Key Laboratory of Medical Instrumentation and Pharmaceutical Technology, Fuzhou 350108, China

College of Mechanical Engineering and Automation, Fuzhou University, Fuzhou 350108, China

Shenyang National Laboratory for Materials Science, Institute of Metal Research, Shenyang 110016, China

Department of Polymeric Materials, School of Materials Science and Engineering, Tongji University, Shanghai 201804, China

Institute for Advanced Study, Tongji University, Shanghai 200092, China

Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing 100084, China

Funding

Department of Science and Technology of Liaoning Province · Tsinghua University · National Natural Science Foundation of China · State Key Laboratory of Robotics

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