Optical microscopy studies of dynamics within individual polymer-dispersed liquid crystal droplets

Acc Chem Res. 2005 Feb;38(2):137-45. doi: 10.1021/ar040106p.

Abstract

Optical devices based on polymer-dispersed liquid crystal (PDLC) thin films derive their functional properties from the electric-field-induced reorientation of (sub)micrometer-sized polymer-dispersed liquid crystal (LC) droplets. In these materials, the LC reorientation dynamics are strongly dependent on droplet size and shape, as well as polymer/LC interfacial interactions. The dynamics also vary spatially within individual droplets. This Account describes studies of individual PDLC droplets and their field-induced dynamics by high-resolution near-field scanning optical microscopy (NSOM) and multiphoton-excited fluorescence microscopy (MPEFM). Included are studies of native ("pure") PDLCs and those doped with ionic compounds and dyes; the latter are used in sophisticated photorefractive materials.

Publication types

  • Research Support, U.S. Gov't, Non-P.H.S.
  • Review

MeSH terms

  • Coloring Agents / chemistry
  • Crystallization
  • Microscopy, Electron, Scanning / instrumentation
  • Microscopy, Electron, Scanning / methods
  • Optical Devices
  • Optics and Photonics*
  • Particle Size
  • Polymers / chemistry*
  • Static Electricity

Substances

  • Coloring Agents
  • Polymers