Raman Spectroscopic Study of Molecular Orientation in Vitreous B2O3 Films.
Abstract
Preferred orientation of a molecular unit in vitreous B2O3 films prepared under tensile stress is demonstrated by laser Raman spectroscopy. The polarized Raman scattering is reported and found to be strongly dependent on sample orientation and polarization of the incident and scattered light. The ratios of scattering intensities in the various scattering arrangements for films are substantially different from those for bulk B2O3(gl). Calculated Raman intensity ratios based upon the proposed oriented boroxol ring structure compare well with the experimental values. These results demonstrate the tendency of a molecular unit with the properties of a boroxol ring to become preferentially oriented in response to an applied stress, and provide evidence for the existence of boroxol rings in B2O3(gl). (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 10, 1981
- Accession Number
- ADA102840
Entities
People
- Charles F. Windisch
- William M. Risen Jr
Organizations
- Brown University