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Surface‐Enhanced Resonance Raman Scattering of a Thin Film of the Non‐Linear Optic Material 4‐( N , N ‐Dimethylamino)‐3‐acetamidonitrobenzene Grown on Potassium Acid Phthalate
Author(s) -
McAleese J.,
Rospendowski B. N.,
Sheen D. B.,
Sherwood J. N.,
Smith W. E.
Publication year - 1997
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/(sici)1097-4555(199701)28:1<73::aid-jrs82>3.0.co;2-p
Subject(s) - raman scattering , raman spectroscopy , chemistry , crystal (programming language) , resonance (particle physics) , scattering , analytical chemistry (journal) , thin film , crystallography , materials science , optics , organic chemistry , nanotechnology , atomic physics , physics , computer science , programming language
Raman scattering from a layer of the non‐linear optic material 4‐( N , N ‐dimethylamino)‐3‐acetamidonitrobenzene (DAN) deposited on a 001 cleavage face of a potassium acid phthalate crystal and on glass were obtained following deposition of a coating of silver on the surface of the material. By choosing different excitation and scattering geometries, a contribution from pre‐resonance Raman scattering from the bulk film and from surface‐enhanced pre‐resonance Raman scattering [SER(R)S] from the film close to the silver layer can be discerned. The approximate orientation of the DAN on the crystal has the plane of the aromatic ring more perpendicular to the surface than on glass and has the nitro group pointing along it. Raman scattering appears to provide both vibrational and electronic information which is sufficiently informative to give the technique potential for the study of the orientation of molecules in thin layers of this type. © 1997 by John Wiley & Sons, Ltd.