Volume 36, Number 6, November III 1996
|Page(s)||425 - 430|
|Section||Condensed matter: structure, thermal and mechanical properties|
|Published online||01 September 2002|
Deuterium NMR and morphology study of polymer-dispersed liquid-crystal Bragg gratings
Department of Physics and Liquid Crystal Institute, Kent
State University, Kent, OH 44242, USA
2 Science Applications International Corporation, 101 Woodman Dr., Dayton, OH 45431, USA
3 Materials Directorate, Wright Laboratory, Wright Patterson Air Force Base, OH 45433-7702, USA
Accepted: 2 October 1996
The orientational order in polymer-dispersed liquid crystals on holographically written volume Bragg gratings is studied using deuterium NMR. Unique spectral patterns indicate that a homeotropic liquid-crystal director configuration at the polymer interface is retained despite the small pore size (). This structure coexists with liquid crystals in trapped defect structures of dimension comparable to the pore size.
PACS: 61.30.Eb – Experimental determinations of smectic, nematic, cholesteric, and lyotropic structures / 61.30.Gd – Orientational order of liquid crystals; electric and magnetic field effects on order / 76.60.Gv – Quadrupole resonance
© EDP Sciences, 1996
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