Effect of TiO2 Nanoparticles on the Improved Surface-Enhanced Raman Scattering of Polypyrrole Deposited on Roughened Gold Substrates
Resource
Journal of Physical Chemistry B 108 (39): 14897-14900
Journal
Journal of Physical Chemistry B
Journal Volume
108
Journal Issue
39
Pages
14897-14900
Date Issued
2004
Date
2004
Author(s)
Abstract
We report here the first electrochemical oxidation−reduction cycle procedure to roughen gold substrates in 0.1 N HCl aqueous solution containing 1 mM rutile TiO2 nanoparticles under the irradiation of UV light. It is encouraging to find that the oxidized peak in the anodic scan, which is responsible for the surface-enhanced Raman scattering, increases significantly due to the effect of adding TiO2 under an electric field and UV irradiation. Moreover, the SERS spectrum of polypyrrole electrodeposited on the corresponding roughened gold substrate exhibits a 5-fold higher intensity compared to that without the contribution of TiO2 nanoparticles.
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Type
journal article
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