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Optica Publishing Group
  • Applied Spectroscopy
  • Vol. 57,
  • Issue 5,
  • pp. 518-521
  • (2003)

Surface-Sensitive Molecular Information on Polymers from UV-Resonance Raman Spectroscopy

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Abstract

Ultraviolet resonance Raman spectroscopy (UV-RRS) has been applied to a series of samples of poly(ethylene 2,6-naphthalene dicarboxylate) (PEN) and poly(ethylene terephthalate) (PET) of varying thickness. The spectra demonstrate that under resonance conditions, when absorption is very strong, only a very thin top layer of the sample is probed (hundreds of nanometers range). This allows probing molecular vibrational spectra of the top layer of the sample, with a surface-resolution at least an order of magnitude better than in the case of normal non-resonance Raman spectroscopy and using a microscope.

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