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Article
Orientational Coupling Amplification in Ferroelectric Nematic Colloids
Physical Review Letters
  • Fenghua Li, Kent State University - Kent Campus
  • Oleksandr Buchnev, Institute of Physics, Ukraine
  • Chae Il Cheon, Hoseo University
  • Anatoliy Glushchenko, University of Colorado at Colorado Springs
  • Victor Reshetnyak, Kyiv Taras Shevchenko University
  • Yuri Reznikov, Institute of Physics, Ukraine
  • Timothy J Sluckin, University of Southampton
  • John L West, Kent State University - Kent Campus
Publication Date
10-1-2006
Document Type
Article
DOI
10.1103/PhysRevLett.97.147801
Keywords
  • liquid-crystals,
  • particles,
  • dispersions,
  • suspensions,
  • size
Disciplines
Abstract

We investigated the physical properties of low concentration ferroelectric nematic colloids, using calorimetry, optical methods, infrared spectroscopy, and capacitance studies. The resulting homogeneous colloids possess a significantly amplified nematic orientational coupling. We find that the nematic orientation coupling increases by similar to 10% for particle concentrations of 0.2%. A manifestation of the increased orientational order is that the clearing temperature of a nematic colloid increases by up to 40 degrees C compared to the pure liquid crystal host. A theoretical model is proposed in which the ferroelectric particles induce local dipoles whose effective interaction is proportional to the square of the orientational order parameter.

Comments

Copyright 2006 American Physical Society. Available on publisher's site at http://dx.doi.org/10.1103/PhysRevLett.97.147801.

Citation Information
Fenghua Li, Oleksandr Buchnev, Chae Il Cheon, Anatoliy Glushchenko, et al.. "Orientational Coupling Amplification in Ferroelectric Nematic Colloids" Physical Review Letters Vol. 97 Iss. 14 (2006)
Available at: http://works.bepress.com/john_west/17/