Effect of TiO2 nanoparticles on the improved surface-enhanced raman scattering of polypyrrole deposited on roughened gold substrates

Yu Chuan Liu; Ping I. Lin; Yit Tsong Chen; Ming Der Ger; Kuo Lung Lan; Chih Lung Lin

doi:10.1021/jp0491764

Effect of TiO2 nanoparticles on the improved surface-enhanced raman scattering of polypyrrole deposited on roughened gold substrates

Yu Chuan Liu, Ping I. Lin, Yit Tsong Chen, Ming Der Ger, Kuo Lung Lan, Chih Lung Lin

Research output: Contribution to journal › Article › peer-review

34 Citations (Scopus)

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.

Original language	English
Pages (from-to)	14897-14900
Number of pages	4
Journal	Journal of Physical Chemistry B
Volume	108
Issue number	39
DOIs	https://doi.org/10.1021/jp0491764
Publication status	Published - Sep 30 2004
Externally published	Yes

ASJC Scopus subject areas

Physical and Theoretical Chemistry

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Effect of TiO2 nanoparticles on the improved surface-enhanced raman scattering of polypyrrole deposited on roughened gold substrates. / Liu, Yu Chuan; Lin, Ping I.; Chen, Yit Tsong; Ger, Ming Der; Lan, Kuo Lung; Lin, Chih Lung.

In: Journal of Physical Chemistry B, Vol. 108, No. 39, 30.09.2004, p. 14897-14900.

Research output: Contribution to journal › Article › peer-review

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AU - Ger, Ming Der

AU - Lan, Kuo Lung

AU - Lin, Chih Lung

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AB - 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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