Fabrication of One-Dimensional Organic Nanofiber Networks via Electrophoretic Deposition for a Nonvolatile Memory Device

Despite many advanced growth methodologies for organic nanofibers (ONFs), the lack of efficient and scalable ONF-based film preparation technologies has long been a hindrance in their practical application in organic electronic devices. Here, a typical cathode electrophoretic deposition (C-EPD) technology was developed to controllably produce ONFs and their corresponding thin films. Using the solvent effect and an external electric field force during the C-EPD process, a one-dimensional ONF network was formed, which exhibits compact molecular packing and superior optoelectronic properties in the thin-film state. Prototype sandwich-structure memory devices based on these ONF films exhibited a binary nonvolatile memory performance significantly superior than that of the bulk materials. This study provides an efficient and scalable ONF fabrication technology for high-performance electronic devices in various potential applications.尽管针对有机纳米纤维（organic nanofibers, ONFs）已开发出多种先进生长方法，但缺乏高效且可规模化的基于ONFs的薄膜制备技术，长期以来一直掣肘其在有机电子器件中的实际应用。本文开发了一种典型的阴极电泳沉积（cathode electrophoretic deposition, C-EPD）技术，可可控制备ONFs及其相应薄膜。借助该C-EPD过程中的溶剂效应与外电场作用力，可形成一维ONF网络，该网络在薄膜态下展现出紧密的分子堆积与优异的光电性能。基于此类ONF薄膜制备的原型三明治结构存储器件，其二元非易失性存储性能显著优于块体材料。本研究为面向各类潜在应用的高性能电子器件提供了一种高效且可规模化的ONF制备技术。