講演情報
[22p-B205-6]Directed Self-Assembly by Liquid-Solid Nonequilibrium Heterointerface for High-Resolution Soft Electronics
〇Lingying Li1, Wanli Li2, Masayuki Kanehara3, Takeo Minari1 (1.NIMS, 2.Jiangnan Univ., 3.C-INK)
キーワード：
directed self-assembly、soft electronics、interfacial engineering
We propose a novel directed self-assembly system induced by liquid-solid nonequilibrium heterointerface (NEHI) for spontaneous patterning of soft electronics with high resolution, functionality, and scalability. The NEHI consists of a continuous liquid phase and a patterned solid phase varied by surface free energy and polarity, which allows for distinctive wetting/dewetting of colloidal inks over substrates and precise alignment of the dispersed functional micro-/nanomaterials into arbitrary structures after room-temperature drying. By simple bar coating, various functional patterns (e.g., gold nanoparticles (AuNPs) and silver nanowires (AgNWs)) can be self-assembled on the substrates with unprecedently high resolution (600 nm in width) and reliable performance. The proposed system further enables layer-by-layer fabrication of organic thin-film transistors (OTFTs) with a short channel length of 1 μm. These findings demonstrate that the NEHI successfully overcomes the bottleneck issues of low resolution and poor performance in the development of directed self-assembly technology and sheds light on soft electronics manufacturing in a cost-effective and sustainable manner.