Bistable memory switching of (liquid crystalline copolymer/low molecular weight liquid crystal) composite systems

Tisato Kajiyama, Hirokazu Yamane, Hirotsugu Kikuchi

Research output: Contribution to journalConference article

Abstract

Bistable electro-optical switching characteristics have been investigated for composite systems in a smectic phase induced by mixing a side chain type nematic liquid crystalline polymer (nematic LCP) or its copolymer with weak polar methoxy terminal groups in the side chains and low molecular weight nematic liquid crystals (nematic LCs) with strong polar cyano end groups. The liquid crystalline copolymer (LCcoP) with weak polar methoxy terminal groups in the side chains attaching to a polysiloxane main chain was used in order to improve the response speed of the bistable light switching for the binary composite system. Although the LCcoP with 52.5 mol% substituted mesogenic side chains did not exhibit any mesophase characteristics at any temperature, this LCcoP induced a smectic state by mixing nematic LCs. A reversible and bistable electro-optical switching with a short response time (approx. 100 ms) was realized for the induced smectic binary composite system upon the application of an appropriate electric field at room temperature.

Original languageEnglish
Pages (from-to)217-227
Number of pages11
JournalMolecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
Volume346
DOIs
Publication statusPublished - Jan 1 2000
EventAnglo-Japanese Seminar on Liquid Crystals'99 - Nara, Jpn
Duration: May 26 1999May 28 1999

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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