TITLE

Fine adjustment of conductivity in polymer-dispersed liquid crystals

AUTHOR(S)
Cupelli, D.; Nicoletta, F. P.; Filpo, G. De; Chidichimo, G.; Fazio, A.; Gabriele, B.; Salerno, G.
PUB. DATE
October 2004
SOURCE
Applied Physics Letters;10/11/2004, Vol. 85 Issue 15, p3292
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The electrical properties of polymer-dispersed liquid crystals (PDLCs) are an important characteristic in their electro-optical performance. Conductivity effects can set up depolarization fields in the films reducing the effective field across the liquid crystal droplets. Both theoretical and experimental investigations have confirmed that the electric field across nematic droplets depends on the liquid crystal and polymer conductivities. In this letter, we have found that the doping of a PDLC with low percentages of a conductive polymer allows a fine adjustment of polymer matrix conductivity. In addition, we have found a large reduction in the re-orientation fields and relaxation times as a function of conductive polymer loading. Results are in rather good agreement with a simple phenomenological model.
ACCESSION #
14909437

 

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