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Surface‐enhanced Raman scattering of adsorbates
Author(s) -
Otto A.
Publication year - 1991
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.1250221204
Subject(s) - raman scattering , atomic orbital , raman spectroscopy , chemical physics , chemistry , scattering , coupling (piping) , electron transfer , molecular physics , surface (topology) , molecular vibration , electron , photochemistry , materials science , molecule , optics , physics , organic chemistry , quantum mechanics , metallurgy , geometry , mathematics
This review concentrates on the electronic contribution to surface‐enhanced Raman scattering (SERS). This socalled ‘chemical effect’ is quantitatively separated from classical electromagnetic enhancement. It proceeds by increased electron‐photon coupling at an atomically rough surface and by temporary charge transfer to adsorbate orbitals. These concepts are supported by various experimental results. The model accounts for the chemical specificity and vibrational selectivity of SERS and (partly) for the ‘SERS specificity’ of various metals.