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research article

Electro and pressure tunable cholesteric liquid crystal devices based on ion-implanted flexible substrates

De Sio, Luciano
•
Palermo, Giovanna
•
Caligiuri, Vincenzo
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2013
Journal Of Materials Chemistry C

We report an electro-responsive and pressure sensitive device based on conductive polydimethylsiloxane (PDMS) combined with a short pitch Cholesteric Liquid Crystal (CLC). Ion-implantation and surface chemistry in PDMS enable both the induction of conducting properties in this elastomer, as well as a long range organization of the CLC. Sample electro-optical and pressure dependent optical properties are explored by applying a modulated electric field through the conducting PDMS and an uniform pressure on the top cover substrate. We show that both an electric field of few V/µm and an external pressure of up to 128 KPa can tune the reflection band by about 100 nm

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