期刊
VIBRATIONAL SPECTROSCOPY
卷 39, 期 1, 页码 74-80出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.vibspec.2004.11.003
关键词
2,2'-biquinoline; 8-hydroxyquinoline; Au; Ag; nanoparticles; adsorption; SERS
The adsorption behaviors of 2,2'-biquinoline (BiQu) and 8-hydroxyquinoline (8HQu) on gold and silver nanoparticle surfaces have been investigated by means of surface-enhanced Raman scattering (SERS) with the detailed vibrational assignment. The aromatic ring of BiQu and 8HQu appeared to assume a perpendicular or a tilted structure with respect to the gold and silver surface from the presence of the v(CH) band at 3050-3060 cm(-1). By determining the relative enhancement factor of each vibrational band, we attempted to explain the orientation and enhancement mechanism on An and Ag surfaces in a more quantitative way. Raman analysis indicated that the SERS enhancement mechanism could be different for BiQu and 8HQu as indicated from a different UV-vis absorbance spectral change in aggregation of gold nanoparticles upon injection of the adsorbates. (c) 2004 Elsevier B.V. All rights reserved.
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