journal article·2022-01-19

Nanofiber Architecture Engineering Implemented by Electrophoretic-Induced Self-Assembly Deposition Technology for Flash-Type Memristors

Cheng Zhang, Yang Li, Zhuang Li, Yucheng Jiang, Jinlei Zhang, Run Zhao, Jingyun Zou, Yanan Wang, Kuaibing Wang, Chunlan Ma, Qichun Zhang

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Abstract

Electrophoretic deposition (EPD) has been recognized as a promising large-scale film preparation technology for industrial application. Inspired by the conventional EPD method and the crystal diffusion growth strategy, we propose a modified electrophoretic-induced self-assembly deposition (EPAD) technique to control the morphologies of organic functional materials. Here, an ionic-type dye with a conjugated skeleton and strong noncovalent interactions, celestine blue (CB), is chosen as a module molecule for EPAD investigation. As expected, CB molecules can assemble into different nanostructures, dominated by applied voltage, concentration effect, and duration. Compared to a nanopillar layered packing structure formed by the traditional spin-coating method, the EPAD approach can produce a nanofiber structure under a fixed condition of 10 V/10 min. Intriguingly, a memristor device based on a pillar-like nanostructure exhibits WORM-type behavior, while a device based on nanofibers presents Flash memory performance. The assemble process and the memory mechanism are uncovered by molecular dynamics simulations and density-functional theory (DFT) calculations. This work endows the typical EPD technique with a fresh application scenario, where an in-depth study on the growth mechanism of nanofibers and the positive effect of unique morphologies on memristor performance are offered.
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Research context

OpenAlex topics: Advanced Memory and Neural Computing · Advanced Photocatalysis Techniques · Conducting polymers and applications

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

Affiliations

Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application, School of Physical Science and Technology, Suzhou University of Science and Technology, Suzhou, Jiangsu 215009, China

College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China

School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China

Jiangsu Key Laboratory of Pesticide Sciences, Department of Chemistry, College of Science, Nanjing Agricultural University, Nanjing 210095, China

Department of Materials Science and Engineering, City University of Hong Kong, Kowloon, Hong Kong SAR 999077, China

Center of Super-Diamond and Advanced Films (COSDAF), City University of Hong Kong, Kowloon, Hong Kong SAR 999077, China

Funding

Natural Science Foundation of Jiangsu Province · Government of Jiangsu Province · City University of Hong Kong · National Natural Science Foundation of China · Suzhou Key Laboratory for Low Dimensional Optoelectronic Materials and Devices · Jiangsu Key Disciplines of the Thirteenth Five-Year Plan · Natural Science Foundation of the Jiangsu Higher Education Institutions of China

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