The correlated metallic tip-enhanced Raman spectroscopy and atomic force microscopy (AFM) technique was used to characterize an interfacial electron transfer system of dye-sensitized titanium oxide (TiO2) nanoparticles. We have obtained the near-field Raman spectra that are associated with the photo-induced charge transfer reaction in Ru(4, 4’-dicarboxy-2,2’-bipyridine)2(NCS)2- sensitized TiO2 single nanoparticles. This method demonstrates that tip-enhanced near-field Raman spectroscopy is an effective approach for probing in homogeneous interfacial electron transfers with nanoscale spatial resolution.
Revised: March 24, 2006 |
Published: February 27, 2006
Citation
Pan D., N.A. Klymyshyn, D. Hu, and H.P. Lu. 2006.Tip-Enhanced Near-Field Raman Spectroscopy Probing Single Dye-Sensitized TiO2 Nanoparticles.Applied Physics Letters 88, no. 9:Art. No. 093121.PNNL-SA-46223.