Nonlinear surface-enhanced spectroscopy of silver colloids and pyridine: Hyper-Raman and second-harmonic scattering

Journal Article · Thu Oct 19 00:00:00 EDT 1989 · Journal of Physical Chemistry; (USA)

DOI:https://doi.org/10.1021/j100358a001· OSTI ID:7025015

Johnson, C K; Soper, S A ^[1]

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1. Univ. of Kansas, Lawrence (USA)

Surface-enhanced hyper-Raman scattering by pyridine was observed in aqueous silver citrate sols. Surface enhancement factors of several pyridine vibrations were measured and range from 10{sup 3} to 10{sup 6}. The strongest enhancements were observed in the totally symmetric vibrations {nu}{sub 12}, {nu}{sub 1}, {nu}{sub 6e}, and {nu}{sub 8a} and the b{sub 2} vibration {nu}{sub 6b}. The surface enhancements observed are larger than predicted by electrodynamic theories of surface enhancement for simple spherical or spheriodal particles, but relative enhancements are consistent with electromagnetic surface enhancement selection rules for hyper-Raman scattering. Elastic incoherent scattering in Ag sols was observed at twice the laser frequency. The intensity of the elastic component was 10{sup 4} to 10{sup 6} times more intense than hyper-Rayleigh scattering from bulk pyridine and increased upon addition of pyridine to the silver sols.

• OSTI ID: 7025015
• Journal Information: Journal of Physical Chemistry; (USA), Vol. 93:21; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
PYRIDINE
SURFACE PROPERTIES
SILVER COMPLEXES
DATA ANALYSIS
ELECTRODYNAMICS
EXPERIMENTAL DATA
MEASURING INSTRUMENTS
MEASURING METHODS
RAMAN SPECTROSCOPY
AZINES
COMPLEXES
DATA
HETEROCYCLIC COMPOUNDS
INFORMATION
LASER SPECTROSCOPY
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PYRIDINES
SPECTROSCOPY
TRANSITION ELEMENT COMPLEXES
360104* - Metals & Alloys- Physical Properties
400201 - Chemical & Physicochemical Properties