Acta Photonica Sinica, Volume. 43, Issue 2, 230002(2014)
Influence of Photoinduced Electron Transfer on Raman Spectroscopic Characteristic of Alizarin Dye-sensitized TiO2 Nanoparticles
Effects of photoinduced electron transfer on the Raman spectroscopy of Alizarin (Alz) dye-sensitized TiO2 nanoparticles were investigated by theoretical and experitmental methods. The results indicate that red-shift of absorption spectra and quenching of the fluorescence spectra are attributed to the photo-induced electron transfers from the excited state of the absorbed Alz dye molecules and the charge transfer complex (Alz/TiO2) to the conduction band manifold of the TiO2 nanoparticles. The resonance Raman spectroscopy of the Alz dye-sensitized TiO2 nanoparticles reveals that the ultrafast photoinduced interface electron transfer significantly enhances the C=C, C-O, and C=O bond stretching vibrations of the absorbed Alz dye molecule at the interface.
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JIANG Li-lin. Influence of Photoinduced Electron Transfer on Raman Spectroscopic Characteristic of Alizarin Dye-sensitized TiO2 Nanoparticles[J]. Acta Photonica Sinica, 2014, 43(2): 230002
Received: Jun. 25, 2013
Accepted: --
Published Online: Feb. 18, 2014
The Author Email: Li-lin JIANG (jianglilin2009@gmail.com)