Nematic liquid crystal micro-droplets on solid surfaces and their ordering transition in bulk aqueous solution
- Authors
- Zhong, Shenghong; Jang, Chang-Hyun
- Issue Date
- 3-Oct-2015
- Publisher
- TAYLOR & FRANCIS LTD
- Keywords
- liquid crystal; micro-droplets; surfactant; liquid-liquid interface; optical images; retardation plate
- Citation
- LIQUID CRYSTALS, v.42, no.10, pp.1436 - 1443
- Journal Title
- LIQUID CRYSTALS
- Volume
- 42
- Number
- 10
- Start Page
- 1436
- End Page
- 1443
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/10020
- DOI
- 10.1080/02678292.2015.1055601
- ISSN
- 0267-8292
- Abstract
- Here, we report the establishment of an experimental system based on liquid crystal (LC) micro-droplets on solid surfaces. These micrometre-sized LC droplets were formed by the dispersion of 0.5% (v/v) 4-cyano-4'-pentylbiphenyl (5CB) dissolved in n-heptane onto an octadecyltrichlorosilane (OTS)-treated glass. Polarised microscopy revealed a dandelion shape or a double-rod shape when LC micro-droplets were immersed in 4mm in the depth of non-surfactant solution, while distinct diamond-shaped textures were obtained when contacted with the bulk surfactant solution. Different types of optical textures were observed due to various configurations of the local director n. In non-surfactant solution, a parallel configuration led to a bright white-coloured dandelion shape or double-rod shape, while in surfactant solution the colourful diamond-shaped textures were caused by normal configuration. The unprecedented observations we report in this paper will lead to further insight into the properties of sessile LC micro-droplets on solid surfaces. The experimental system established in this paper can be broadly applied to report the liquid-liquid interfacial phenomena, and provide important guidance to the design of surface-anchored LC micro-droplets as chemo-responsive materials for use in optical sensors.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - 바이오나노대학 > 나노화학과 > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.