Document Type
Article
Publication Date
10-30-2000
Abstract
IR-visible sum-frequency generation(SFG) spectroscopy has been used in a total internal reflection geometry to study the molecular structure of polystyrene (PS) at PS/sapphire and PS/air interfaces, simultaneously. The symmetric vibrational modes of the phenyl rings dominate the SFG spectra at the PS/air interface as compared to the antisymmetric vibrational modes at the PS/sapphire interface. This indicates approximately parallel orientation of the phenyl rings at the PS/air interface while nearly perpendicular orientation at the PS/sapphire interface, with respect to the surface normal.
Publication Title
Physical Review Letters
Volume
85
Issue
18
First Page
3854
Last Page
3857
Required Publisher's Statement
Copyright 2000 American Physical Society. The original published version of this article may be found at http://dx.doi.org/10.1103/PhysRevLett.85.3854.
Recommended Citation
Gautam, K. S.; Schwab, Alexander D.; Dhinojwala, Ali; Zhang, D.; Dougal, S. M.; and Yeganeh, M. S., "Molecular Structure of Polystyrene at Air/Polymer and Solid/Polymer Interfaces" (2000). College of Polymer Science and Polymer Engineering. 24.
https://ideaexchange.uakron.edu/polymer_ideas/24