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Charge-Transfer-Induced Surface-Enhanced Raman Scattering on Ag−TiO2 Nanocomposites
Abstract
In this paper, a series of silver-deposited TiO 2 (Ag−TiO 2 ) nanoparticles (NPs) with a varying content of Ag were prepared by a photoreduction method and were attempted to serve as SERS-active substrates for the first time. SERS signals of 4-MBA molecules adsorbed on Ag−TiO 2 NPs were further enhanced considerably relative to those enhancements on pure TiO 2 NPs. The surface-deposited Ag on TiO 2 can inject additional electrons into molecules adsorbed on the TiO 2 surface through the conduction band of TiO 2 NPs because of plasmon resonance absorption of Ag under incident visible laser, besides the intrinsic TiO 2 -to-molecule charge-transfer (CT) contribution. The two contributions mentioned are responsible for the whole SERS intensity of the molecules adsorbed on Ag−TiO 2 NPs. This work is valuable in developing nanosized TiO 2 used as a promising, nontoxic and biologically compatible SERS-active substrate as well as in studying the CT mechanism between Ag and TiO 2 for potential photoelectrochemical applications.
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Cites
Photocatalysis on TiO2 Surfaces: Principles, Mechanisms, and Selected Results
Linsebigler, A. L., Lu, G., & Yates, J. T. (1995) · Chemical Reviews · doi:10.1021/cr00035a013 · Cited by 11,575
Cited by
Enhanced Raman Scattering with Dielectrics
Alessandri, I., & Lombardi, J. R. (2016) · Chemical Reviews · doi:10.1021/acs.chemrev.6b00365 · Cited by 655
Self-citationLiu, R., Wang, P., Wang, X., Yu, H., & Yu, J. (2012) · The Journal of Physical Chemistry C · doi:10.1021/jp305774n · Cited by 266
Forensic and homeland security applications of modern portable Raman spectroscopy
Izake, E. L. (2010) · Forensic Science International · doi:10.1016/j.forsciint.2010.03.020 · Cited by 263
Metadata
- Authors
- Yang, L., Jiang, X., Ruan, W., Yang, J., Zhao, B., Xu, W., & Lombardi, J. R.
- Venue
- The Journal of Physical Chemistry C
- Publisher
- American Chemical Society (ACS)
- Published
- 2009-08-18
- Volume
- 113
- Issue
- 36
- Pages
- 16226-16231
- ISSN
- 1932-7447 (ISSN-L)
- 1932-7455
- OpenAlex
- W2043220124
- Cited by
- 246
- References
- 1
- FWCI
- 3.91
- Type
- journal article
- Language
- en
- Open access
- closed
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- Yang, L., Jiang, X., Ruan, W., Yang, J., Zhao, B., Xu, W., & Lombardi, J. R. (2009). Charge-Transfer-Induced Surface-Enhanced Raman Scattering on Ag−TiO2 Nanocomposites. The Journal of Physical Chemistry C. https://doi.org/10.1021/jp903600r
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