▎ 摘　　要

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.