Photoinduced Absorption and Erasable Optical Information Storage in Polyanilines
Abstract
Photoinduced absorption spectroscopy has been used to study a variety of forms of polyaniline. Experiments on emeraldine base and leucoemeraldine base have led to a picture of the photoproduction and decay of massive, long-lived defect states that can be described in terms of conformational changes involving rotations of the C6H4 rings. Photoexcitation spectra of other polyanilines, such as pernigraniline base and poly(o-toluidine), exhibit similar features including relatively weak photoinduced infrared vibrations and a relatively strong photoinduced absorption peak near 1.4-1.5 eV. In several of these materials, the photoinduced changes are very long-lived, leading to an investigation of the polyanilines as media for erasable optical information storage.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 18, 1991
- Accession Number
- ADA234108
Entities
People
- A. G. Macdiarmid
- Arthur J. Epstein
- E. M. Scherr
- G. E. Asturias
- H. J. Ye
- J. G. Masters
- J. M. Ginder
- J. M. Leng
- K. A. Coplin
- R. P. Mccall
- S. K. Manohar
- Y Sun
Organizations
- University of Pennsylvania