We present a direct probe of the charge transfer interaction on a micron sized anatase TiO2 crystal using a linker molecule and silver nanoparticles. All linker molecules were either a di-thiol or a thiol with a carboxylic acid. The dithiol system allows for the TiO2/silver band gap to work as the driving force behind the charge transfer mechanism, while the thiol/carboxylic acid system establishes a dipole that can enhance or stop the charge transfer from TiO2. Bulk Raman spectra indicate that the TiO2 charge transfer does contribute to the SERS, but that the silver plasmon still contributes the majority of the Raman enhancement. SEM was used to confirm the structure and coverage.

SERS based charge transfer probing of micron sized anatase TiO<sub>2</sub> through organic linkers with silver nano-particles

245th National Meeting (2013)

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SERS based charge transfer probing of micron sized anatase TiO2 through organic linkers with silver nano-particles

SERS based charge transfer probing of micron sized anatase TiO₂ through organic linkers with silver nano-particles