Investigation on fluorescence quenching of dyes by graphite oxide and graphene |
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Authors: | Yan Liu Chun-yan Liu Yun Liu |
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Institution: | a Key Laboratory of Photochemical Conversion and Optoelectronic Materials of Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China b Graduate School of the Chinese Academy of Sciences, Beijing 100049, PR China |
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Abstract: | 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. |
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Keywords: | Graphite oxide Graphene Electron transfer Fluorescence quenching |
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