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Graphene Oxide Modified with Mesogenic Groups and Its Effect in Broad‐Band Reflectors
Author(s) -
Wang Xiaomei,
Cao Hangchao,
Zhang Li,
Zhang Ruirui,
Wang Dong,
Yang Zhou,
He Wangli,
Cao Hui,
Yang Huai
Publication year - 2015
Publication title -
chempluschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.801
H-Index - 61
ISSN - 2192-6506
DOI - 10.1002/cplu.201402315
Subject(s) - mesogen , materials science , liquid crystal , dopant , photopolymer , polymerization , graphene , doping , oxide , chemical engineering , reflection (computer programming) , composite number , fabrication , organic chemistry , nanotechnology , optoelectronics , composite material , chemistry , polymer , liquid crystalline , computer science , engineering , metallurgy , programming language , medicine , alternative medicine , pathology
The NH 2 ‐terminated mesogenic group 4‐(6‐amine‐hexyloxy)‐4*‐cyan‐biphenyl is chemically grafted onto the carboxylic groups of graphene oxide (GO) through an amidation reaction. The resultant mesogenic‐group‐modified GO sheets (GO‐LC) are redispersed easily in common organic solvents, facilitating the structure characterization and device fabrication by solution processing. Broad‐band reflectors are obtained by doping different contents of GO‐LC nanosheets into chiral nematic liquid crystalline (N*‐LCs) media with a photopolymerization process. The experimental results show that both the bandwidth of the reflection spectrum and the location of the reflection band of the GO‐LC‐doped composite films are better than those of the N*‐LCs sample without GO‐LC doping. The effects of polymerization temperature and amount of GO‐LC dopant on the broad‐band reflection of the N*‐LC composite films are investigated.