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Inverse piezoelectric and electrostrictive response in freely suspended FLC elastomer film as detected by interferometric measurements

Biomedical Sciences Research Institute Computer Science Research Institute Environmental Sciences Research Institute Nanotechnology & Advanced Materials Research Institute

Roy, SS, Lehmann, W, Gebhard, E, Tolksdorf, C, Zentel, R and Kremer, F (2002) Inverse piezoelectric and electrostrictive response in freely suspended FLC elastomer film as detected by interferometric measurements. MOLECULAR CRYSTALS AND LIQUID CRYSTALS, 375 . pp. 253-268. [Journal article]

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Abstract

We report the electric field induced thickness variations of homeotropically oriented free standing films of a smectic (C* or A*) FLCE prepared from cross - linkable ferroelectric polysiloxanes. The changes in optical path length in free standing ferroelectric liquid crystal elastomer films have been detected by means of interferometric measurements at both the first and second harmonic of the exciting electric field (w=33Hz). The measured electrostrictive strain is above 2.7% (in the thickness direction) at a electric field around 1.5 MV/m. Our experiment reveal that the inverse piezoelectric and electrostrictive response increases sharply near the Sm-C* - Sm-A* phase transition temperature. Also X-ray reflection measurements on a spin cast FLCE film reveal the constriction of smectic layers.

Item Type:Journal article
Faculties and Schools:Faculty of Computing & Engineering
Faculty of Computing & Engineering > School of Engineering
Research Institutes and Groups:Engineering Research Institute
Engineering Research Institute > Nanotechnology & Integrated BioEngineering Centre (NIBEC)
ID Code:14083
Deposited By:Dr Susanta Sinha Roy
Deposited On:07 Jun 2010 14:37
Last Modified:18 Aug 2011 12:03

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