Direct observation of surface-enhanced Raman scattering in ZnO nanocrystals
Article first published online: 3 MAR 2009
Copyright © 2009 John Wiley & Sons, Ltd.
Journal of Raman Spectroscopy
Volume 40, Issue 8, pages 1072–1077, August 2009
How to Cite
Wang, Y., Ruan, W., Zhang, J., Yang, B., Xu, W., Zhao, B. and Lombardi, J. R. (2009), Direct observation of surface-enhanced Raman scattering in ZnO nanocrystals. J. Raman Spectrosc., 40: 1072–1077. doi: 10.1002/jrs.2241
- Issue published online: 17 AUG 2009
- Article first published online: 3 MAR 2009
- Manuscript Accepted: 27 JAN 2009
- Manuscript Received: 21 AUG 2008
- National Natural Science Foundation. Grant Numbers: 20573041, 20773044, 20873050
- Development Program of the Science and Technology of Jilin. Grant Numbers: 20060902-02, 20075020
- ZnO nanocrystals;
- surface-enhanced Raman scattering;
We have been able to observe the surface-enhanced Raman scattering (SERS) from 4-mercaptopyridine (4-Mpy) molecules adsorbed on ZnO nanocrystals, which display 103 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 © 2009 John Wiley & Sons, Ltd.