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Applied Spectroscopy

Applied Spectroscopy

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  • Vol. 54, Iss. 8 — Aug. 1, 2000
  • pp: 1120–1125

Surface-Enhanced Raman Scattering and Imaging of Langmuir–Blodgett Monolayers of Bis(phenethylimido)perylene on Silver Island Films

R. F. Aroca, C. J. L. Constantino, and James Duff

Applied Spectroscopy, Vol. 54, Issue 8, pp. 1120-1125 (2000)


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Abstract

The optical spectra of bis(phenethylimido)perylene (PhPTCD) are discussed. Surface-pressure area isotherms of floating Langmuir monomolecular layers have been obtained, and Langmuir–Blodgett (LB) molecular monolayers of the material have been fabricated on silver island substrates for surface-enhanced vibrational studies. The electronic absorption and emission spectra of solutions and thin solid films are described. The vibrational spectra, infrared and Raman for the bulk, and the surface-enhanced Raman (SERS) and resonance Raman scattering (SERRS) spectra of LB monolayers have been obtained. Surface-enhanced fluorescence (SEF) for LB films is also demonstrated. Given the unique properties of the LB coated silver surfaces, the mapping of the SERS/SERRS signal and global Raman images, at a particular vibrational wavenumber, were obtained by using the 780 and 514.5 nm laser lines. The images give a visual picture of the variation of the SERRS and SERS signal intensity on the rough metal surface.

Citation
R. F. Aroca, C. J. L. Constantino, and James Duff, "Surface-Enhanced Raman Scattering and Imaging of Langmuir–Blodgett Monolayers of Bis(phenethylimido)perylene on Silver Island Films," Appl. Spectrosc. 54, 1120-1125 (2000)
http://www.opticsinfobase.org/as/abstract.cfm?URI=as-54-8-1120


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