Oriented Yttrium Strontium Tin Oxide Micro/Nanostructures Induced by Brush Coating for Low-Voltage Liquid Crystal Systems

Dong Wook Lee, Eun Mi Kim, Gi Seok Heo, Dong Hyun Kim, Jin Young Oh, Dae Hyun Kim, Yang Liu, Dae Shik Seo

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

We present a convenient liquid crystal (LC) alignment method using brush hairs. An yttrium strontium tin oxide (YSrSnO) solution was prepared using a sol-gel process, and the one-step brush-coating process integrated film deposition and alignment. X-ray photoelectron spectroscopy confirmed a well-formed YSrSnO film via thermal oxidation. Atomic force microscopy showed oriented micro/nanostructures of the brush-coated film, attributed to shearing stress from brush-hair movements on the coating surface; the directionality was identical to that of the brushed coating, which caused physical surface anisotropy and uniform LC alignment on the YSrSnO layer. Uniform and homogeneous LC alignment was confirmed by polarized optical microscopy and pretilt angle measurements. Thermal stability tests of the LCs showed a suitable thermal budget, and the YSrSnO film showed fine optical transparency. Excellent electro-optical properties were observed in twisted-nematic LC system with remarkable low operating voltage. Thus, we expect brush coating to be a viable next-generation technology for LC systems.

Original languageEnglish
Pages (from-to)6925-6934
Number of pages10
JournalACS Applied Nano Materials
Volume5
Issue number5
DOIs
Publication statusPublished - 2022 May 27

Bibliographical note

Publisher Copyright:
© 2022 American Chemical Society. All rights reserved.

All Science Journal Classification (ASJC) codes

  • General Materials Science

Fingerprint

Dive into the research topics of 'Oriented Yttrium Strontium Tin Oxide Micro/Nanostructures Induced by Brush Coating for Low-Voltage Liquid Crystal Systems'. Together they form a unique fingerprint.

Cite this