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Micro‐Raman Scattering Imaging of Langmuir–Blodgett Surface Relief Gratings
Author(s) -
Constantino C. J. L.,
Aroca R. F.,
Mendonça C. R.,
Mello S. V.,
Balogh D. T.,
Zilio S. C.,
de Oliveira, Jr. O. N.
Publication year - 2001
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/1616-3028(200102)11:1<65::aid-adfm65>3.0.co;2-0
Subject(s) - raman scattering , materials science , raman spectroscopy , x ray raman scattering , resonance (particle physics) , scattering , optics , coherent anti stokes raman spectroscopy , laser , analytical chemistry (journal) , nuclear magnetic resonance , molecular physics , atomic physics , chemistry , physics , chromatography
Surface relief gratings (SRGs) recorded on Langmuir–Blodgett (LB) films of an azobenzene homopolymer were visualized using micro‐Raman imaging. Raman scattering (RS) was achieved using the 780 nm laser line while pre‐resonance Raman scattering (pre‐RRS) and resonance Raman scattering were achieved using the 633 and 514.5 nm laser lines, respectively. Pre‐surface‐enhanced resonance Raman scattering (pre‐SERRS) and surface‐enhanced resonance Raman scattering (SERRS) were collected for the LB films covered with a 6 nm thick silver island film. The SRG could be chemically identified by the spatial variation in the Raman signal scattered by the film due to a concentration gradient. The pre‐SERRS provided signals of the same intensity along and across the grooves, indicating that the molecular architecture at the SRG surface is the same at the peaks as in the valleys.