Journal
JOURNAL OF RAMAN SPECTROSCOPY
Volume 46, Issue 3, Pages 287-292Publisher
WILEY
DOI: 10.1002/jrs.4645
Keywords
SERS; TiO2; mixed crystal phase; charge transfer; 4-MBA
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Funding
- National Natural Science Foundation of People's Republic of China [21003063, 21473078, 21273091, 21327803]
- Natural Science Foundation of Heilongjiang Province of China [B201309]
- Program for New Century Excellent Talents in Heilongjiang Provincial University [1253-NCET-023]
- National Undergraduate Training Programs for Innovation and Entrepreneurship [201410222021]
- Postgraduate Scientific Research Innovation Project of Jiamusi University [LM2014_067]
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In this paper, anatase and rutile TiO2 nanoparticles as well as their mixed crystal phase structure TiO2 nanoparticles were synthesized by a sol-hydrothermal method, and were served as active substrates for surface-enhanced Raman scattering (SERS) study. The results show that the 4-mercaptobenzoic acid probe molecules exhibit different degree SERS enhancements on the surface of different phase structure TiO2 nanoparticles. The mixed crystal structure TiO2 with an appropriate proportion of anatase and rutile phase is favourable to SERS enhancement of adsorbed molecules. These are mainly attributed to the contributions of the TiO2-to-molecule charge transfer mechanism and the mixed crystal effect. Copyright (c) 2015 John Wiley & Sons, Ltd.
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