Abstract
| Language | English |
|---|---|
| Pages | 253-268 |
| Journal | Molecular Crystals and Liquid Crystals |
| Volume | 375 |
| Publication status | Published - 2002 |
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Inverse piezoelectric and electrostrictive response in freely suspended FLC elastomer film as detected by interferometric measurements. / Roy, SS; Lehmann, W; Gebhard, E; Tolksdorf, C; Zentel, R; Kremer, F.
In: Molecular Crystals and Liquid Crystals, Vol. 375, 2002, p. 253-268.Research output: Contribution to journal › Article
TY - JOUR
T1 - Inverse piezoelectric and electrostrictive response in freely suspended FLC elastomer film as detected by interferometric measurements
AU - Roy, SS
AU - Lehmann, W
AU - Gebhard, E
AU - Tolksdorf, C
AU - Zentel, R
AU - Kremer, F
N1 - 9th International Topical Meeting on Optics of Liquid Crystals, SORRENTO, ITALY, OCT 01-06, 2001
PY - 2002
Y1 - 2002
N2 - 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.
AB - 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.
M3 - Article
VL - 375
SP - 253
EP - 268
JO - Molecular Crystals and Liquid Crystals
T2 - Molecular Crystals and Liquid Crystals
JF - Molecular Crystals and Liquid Crystals
SN - 1542-1406
ER -