Surface-sensitive molecular information on polymers from UV-resonance Raman spectroscopy.
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.
Wang
Jiann-Hua
JH
Chemistry Department, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK.
Klenerman
David
D
van der Pol
André
A
Meier
Robert J
RJ
D003461:Crystallography / Q000379:methods*; D005240:Feasibility Studies; D008968:Molecular Conformation; D036103:Nanotechnology / Q000379:methods*; D009284:Naphthols / Q000737:chemistry*; D011093:Polyethylene Terephthalates / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry; D012542:Scattering, Radiation; D013056:Spectrophotometry, Ultraviolet / Q000379:methods*; D013059:Spectrum Analysis, Raman / Q000379:methods*; D013499:Surface Properties
D009284:Naphthols; D011093:Polyethylene Terephthalates; D011108:Polymers