Nanoparticle-induced widening of the temperature range of liquid-crystalline blue phases

Condensed Matter journal club

Nanoparticle-induced widening of the temperature range of liquid-crystalline blue phases

  • Event time: 11:30am
  • Event date: 15th October 2010
  • Speaker: (School of Physics & Astronomy, University of Edinburgh)
  • Location: Room 2511,

Event details

Abstract

Liquid-crystalline blue phases exhibit exceptional properties for applications in the display and sensor industry. However, in single component systems, they are stable only for very narrow temperature range between the isotropic and the chiral nematic phase, a feature that severely hinders their applicability. Systematic high-resolution calorimetric studies reveal that blue phase III is effectively stabilized in a wide temperature range by mixing surface-functionalized nanoparticles with chiral liquid crystals. This effect is present for two liquid crystals, yielding a robust method to stabilize blue phases, especially blue phase III. Theoretical arguments show that the aggregation of nanoparticles at disclination lines is responsible for the observed effects.
PHYSICAL REVIEW E 81 041703 (2010)

Authors

Eva Karatairi, Brigita Rozic, Zdravko Kutnjak, Vassilios Tzitzios, George Nounesis, George Cordoyiannis, Jan Thoen and Christ Glorieux