Open AccessManipulation of structural color reflection in graphene oxide dispersions using electric fields
Author(s) -
SeungHo Hong,
Tong Shen
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.018969
Subject(s) - graphene , structural coloration , materials science , electric field , optics , reflection (computer programming) , color gel , optoelectronics , photonic crystal , electrode , total internal reflection , oxide , substrate (aquarium) , dispersion (optics) , nanotechnology , computer science , chemistry , physics , oceanography , quantum mechanics , layer (electronics) , geology , metallurgy , programming language , thin film transistor
Aqueous graphene oxide (GO) dispersions with a photonic crystal structure are carefully prepared to produce structural color reflection. We fabricate a simple reflective GO cell with a unique electrode design and demonstrate that the resulting structural color reflection is electrically erasable and rewritable. GO concentration and the direction of the electric field are vital factors in the development of the device. The resulting device works well, although it exhibits a rather slow response time; in particular, the spontaneous recovery time from dark to bright color reflection requires tens of minutes. Through the application of a horizontal electric field parallel to the substrate, the recovery time can be improved, resulting in a recovery period of 3 min. Although many unsolved issues remain, the findings in GO dispersion may provide a new possibility for color filter-less bi-stable color displays with low power consumption.