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Shear-induced surface alignment of polymer dispersed liquid crystal microdroplets on the boundary layerPolymer dispersed liquid crystal thin films have been deposited on a glass substrate, utilizing the processes of polymerization and solvent evaporation induced phase separation. Liquid crystal microdroplets trapped on the upper surface of the thin film respond to the shear stress due to air or gas flow on the surface layer. Response to an applied step shear stress input on the surface layer has been measured by measuring the time response of the transmitted light intensity. Initial results on the measurements of the light transmission as a function of the air flow differential pressure indicate that these systems offer features suitable for boundary layer and gas flow sensors.
Document ID
19930033508
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Parmar, D. S.
(NASA Langley Research Center Hampton, VA, United States)
Singh, J. J.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1993
Publication Information
Publication: Molecular Crystals and Liquid Crystals
ISSN: 0026-8941
Subject Category
Engineering (General)
Accession Number
93A17505
Funding Number(s)
CONTRACT_GRANT: NAS1-18584-111
Distribution Limits
Public
Copyright
Other

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