Tip-enhanced near-field Raman spectroscopy probing single dye-sensitized TiO{sub 2} nanoparticles

Journal Article · Mon Feb 27 00:00:00 EST 2006 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.2176865· OSTI ID:20778759

Duohai, Pan; Klymyshyn, Nick; Hu, Dehong; Lu, H Peter ^[1]

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1. Pacific Northwest National Laboratory, Chemical Science Division, Fundamental Science Directorate, Richland, Washington 99352 (United States)

The correlated metallic tip-enhanced Raman spectroscopy and atomic force microscopy (AFM) technique was used to characterize dye-sensitized titanium oxide (TiO{sub 2}) 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){sub 2}(NCS){sub 2}-sensitized TiO{sub 2} single nanoparticles. This method demonstrates that tip-enhanced near-field Raman spectroscopy is an effective approach for understanding inhomogeneous interfacial electron transfers with nanoscale spatial resolution.

• OSTI ID: 20778759
• Journal Information: Applied Physics Letters, Vol. 88, Issue 9; Other Information: DOI: 10.1063/1.2176865; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATOMIC FORCE MICROSCOPY
CHARGE EXCHANGE
DYES
ELECTRON TRANSFER
NANOSTRUCTURES
PARTICLES
RAMAN SPECTRA
RAMAN SPECTROSCOPY
SPATIAL RESOLUTION
TITANIUM OXIDES
TRANSFER REACTIONS