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Updated: Dec 30, 2025
Optimized Fabrication Procedure for High-Quality Graphene-based Moiré Superlattice Devices
Published on: July 11, 2025
Graphene Oxide Modified with Mesogenic Groups and Its Effect in Broad-Band Reflectors
Xiaomei Wang1, Hangchao Cao1, Li Zhang1
1University of Science and Technology, Department of Materials Science and Engineering, Beijing, No. 30, Xueyuan Road, Haidian District, Beijing 100083 (P. R. China), Fax: (+86) 010-62333759.
Abstract:
The NH2 -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.
