Premium
Surface‐enhanced Raman scattering of pyridine in silver colloids excited in the near‐infrared region
Author(s) -
Liang E. J.,
Engert C.,
Kiefer W.
Publication year - 1993
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1250241109
Subject(s) - raman scattering , raman spectroscopy , pyridine , excitation , infrared , excited state , materials science , nanoprobe , analytical chemistry (journal) , chemistry , spectrometer , laser , optics , atomic physics , nanotechnology , nanoparticle , physics , organic chemistry , quantum mechanics
A scanning Raman spectrometer and an Nd: YAG laser operating at 1.06 μm were used to observe the surfaceenhanced Raman scattering (SERS) of pyridine in yellow silver colloids. Enhancement factors for the triangle ring breathing vibration mode at 1006 cm −1 and for the totally symmetric breathing mode at 1036 cm −1 are about 16.5 and 21 times larger, respectively, than those found for excitation at 514.5 nm. The large enhancement factors for excitation in the near‐infrared region suggest that further refinement of the theories currently proposed to explain the SERS effect is necessary.