Journal
APPLIED SURFACE SCIENCE
Volume 257, Issue 13, Pages 5513-5518Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2010.12.136
Keywords
Graphite oxide; Graphene; Electron transfer; Fluorescence quenching
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Rhodamine B (Rh B), eosin (E) and methylene blue (MB) were used as a probe to investigate the molecular structure and charge of the dyes on the sensitized efficiency of graphite oxide (GO) and graphene (G). The structure of the prepared GO and G were characterized by X-ray diffraction (XRD) and atomic force microscopy (AFM), respectively. To study the electron transfer between dyes and GO or G, UV-vis absorption spectra (UV-vis), steady state fluorescence spectra (FL) and time resolved fluorescence spectra have been determined. It has been found that the electron transfer from the excited dyes to G was more efficient than to GO, and the transfer from excited MB to G was easier than to Rh B and E, because of the different electrostatic attraction between the dye and G. (C) 2011 Elsevier B. V. All rights reserved.
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