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Article
Stable Amorphous Blue Phase of Bent-Core Nematic Liquid Crystals Doped With a Chiral Material
Journal of Materials Chemistry (2010)
  • Stefanie Taushanoff, Kent State University - Kent Campus
  • Khoa Van Le
  • Jarrod Williams, Kent State University - Kent Campus
  • Robert J. Twieg, Kent State University - Kent Campus
  • B. K. Sadashiva
  • Hideo Takezoe
  • Antal Jakli, Kent State University - Kent Campus
Abstract

We report an induction of the blue phase III (BPIII) at a relatively low and wide ( over 20 degrees C) temperature range in nematogenic achiral bent-core liquid crystals doped with a high twisting power chiral material. The pitch decreases with increasing chiral dopant ratio, and easily reaches the ultraviolet wavelength, so that completely dark texture is obtained under crossed polarizers. Electrooptical switching was achieved in a time range of a few to a few tens of milliseconds. We propose for the stabilization of BPIII that broad-temperature range smectic nano-clusters inhibit the long-range order of the double twisted helical structures, and also inhibit possible separation of chiral dopants from the mixture.

Keywords
  • Banana-Shaped Molecules,
  • Isotropic-Phase,
  • Critical-Point,
  • Biaxiality,
  • Transition
Disciplines
Publication Date
June 15, 2010
Publisher Statement
Available on publisher's site at http://dx.doi.org/10.1039/c0jm00690d
Citation Information
Stefanie Taushanoff, Khoa Van Le, Jarrod Williams, Robert J. Twieg, et al.. "Stable Amorphous Blue Phase of Bent-Core Nematic Liquid Crystals Doped With a Chiral Material" Journal of Materials Chemistry Vol. 20 Iss. 28 (2010)
Available at: http://works.bepress.com/antal_jakli/3/