Journal
JOURNAL OF PHYSICAL CHEMISTRY B
Volume 120, Issue 26, Pages 6368-6372Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcb.6b03241
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Funding
- Office of Naval Research
- National Science Foundation [DMR-0605889, DMR-1106014, DMR-1409658]
- NSF [PHY11-25915]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1409658] Funding Source: National Science Foundation
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As an approach for electrically controllable actuators, we prepare elastomers of chiral smectic-A liquid crystals, which have an electroclinic effect, i.e., molecular tilt induced by an applied electric field. Surprisingly, our experiments find that an electric field causes a rapid and reversible twisting of the film out of the plane, with a helical sense that depends on the sign of the field. To explain this twist, we develop a continuum elastic theory based on an asymmetry between the front and back of the film. We further present finite-element simulations, which show the dynamic shape change.
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