期刊
MATERIALS TODAY COMMUNICATIONS
卷 28, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.mtcomm.2021.102539
关键词
Nematic liquid crystals; Graphene oxide; Self-assembly; Surface functionalization; Vertical alignment layer
资金
- National Research Foundation of Korea (NRF) - Korean government (MSIT) [NRF-2018R1A5A1024127]
This study presents a novel method utilizing alkylated graphene oxide for achieving homeotropic alignment of nematic liquid crystals, resulting in initial homeotropic orientation with excellent alignment ability and optical performance.
Graphene oxide (GO) is one of the thinnest two-dimensional (2D) organic materials and has been investigated for application in various fields due to its excellent mechanical and optical properties. The unique planar structure and hydrophilic functional groups allow GO to spontaneously form various nanoarchitectures. Herein, we report an unprecedented methodology to achieve the homeotropic alignment of nematic liquid crystals (NLCs) using surface-anchored alkylated graphene oxide (AGO). The GO is functionalized by amino reactions with dodecylamine to impart amphiphilic characteristics. This AGO spontaneously forms a 2D-alignment layer on indium tin oxide surface via polar affinity, and the hydrophobic alkyl chains of AGO guide the constant direction of the NLCs. Furthermore, a study on the effect of the alkylation ratio of AGO on the NLC orientation was conducted, and the achievement of a 2D-alignment layer based on the optimal AGO successfully resulted in the initial homeotropic orientation of the NLCs without any defects. Compared to a conventional polymer alignment layer, it showed a comparable alignment ability, and exhibited an improved optical transmittance due to the ultrathin nature of the AGO alignment layer. This new modus of NLC vertical alignment based on the use of AGO can expand the utility of functionalized GO.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据