Journal
JOURNAL OF RAMAN SPECTROSCOPY
Volume 40, Issue 8, Pages 1072-1077Publisher
WILEY
DOI: 10.1002/jrs.2241
Keywords
ZnO nanocrystals; surface-enhanced Raman scattering; 4-mercaptopyridine
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Funding
- National Natural Science Foundation of P. R. China [20573041, 20773044, 20873050]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT0422]
- Program for New Century Excellent Talents in University
- 111 project [1306009]
- Science and Technology of Jilin Province [20060902-02, 20075020]
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We have been able to observe the surface-enhanced Raman scattering (SERS) from 4-mercaptopyridine (4-Mpy) molecules adsorbed on ZnO nanocrystals, which display 10(3) enhancement factors (EFs). An excitation wavelength-dependent behavior is clearly observed. Another molecule BVPP is also observed to have surface-enhanced Raman signals. The chemical enhancement is most likely responsible for the observed enhancement, since plasmon resonances are ruled out. The research is important not only for a better understanding of the SERS mechanism, but also for extension of the application of Raman spectroscopy to a variety of adsorption problems on a semiconductor surface. Copyright (C) 2009 John Wiley & Sons, Ltd.
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