About this Journal Submit a Manuscript Table of Contents
ISRN Optics
Volume 2012 (2012), Article ID 647849, 5 pages
http://dx.doi.org/10.5402/2012/647849
Research Article

Colorful Polymer Compositions with Dyed Graphene Oxide Nanosheets

1Institute of Problems of Chemical Physics of Russian Academy of Sciences, Chernogolovka, Moscow 142432, Russia
2Instituto Politécnico Nacional, ESFM, UPALM, Avenida IPN, Edif. 9, 07738 Mexico City, DF, Mexico
3Department of Physics, Florida A&M University, Tallahassee, FL 32307, USA

Received 23 November 2011; Accepted 26 December 2011

Academic Editors: L. Shah and A. Tervonen

Copyright © 2012 Y. M. Shulga et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A water suspension of graphene oxide nanosheets (GONSs) obtained via exfoliation of a graphite oxide was treated with a solution of rhodamine 6G. It was found that adding the dye results in the destruction of the GONS water suspension and the precipitation of dyed graphene oxide. The precipitate, washed out of the excess dye and subjected to a second dispersal via sonification, provides a stable suspension of dyed GONS in water or dimethylformamide. The GONS dyeing produces shifts of major absorption bands of the dye in solutions or in polymer compositions toward larger wavelengths. We also found that the stability of a dye subjected to ultraviolet irradiation increases if the dye is bound to a GONS. The increased stability resulted from excitation transfer from dye to a GO nanosheet and its subsequent reduction.