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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 13, Iss. 2 — Jan. 24, 2005
  • pp: 468–474

Pinning effect on the phase separation dynamics of thin polymer-dispersed liquid crystals

Yi-Hsin Lin, Hongwen Ren, Yung-Hsun Wu, Xiao Liang, and Shin-Tson Wu  »View Author Affiliations

Optics Express, Vol. 13, Issue 2, pp. 468-474 (2005)

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The surface pining effects on phase separation dynamics of polymer-dispersed liquid crystals (PDLCs) with thin cell gaps are demonstrated. Comparing various boundary conditions, the inner surfaces of the substrates with or without polyimide layers [but no rubbing] cannot provide enough anchoring force, so in either case the liquid crystal (LC) droplets flow and coalesce to form larger and less uniform droplets. However, if the inner surfaces of the substrates are coated with rubbed polyimide layers with anchoring energy >1x10-4 J/m2, almost all the nucleated LC droplets grow at a fixed position during phase separation. The appearance of the coalescence is not obvious and the formed LC droplets are relatively uniform. The surface anchoring has a significant effect on the morphology of PDLCs.

© 2005 Optical Society of America

OCIS Codes
(160.5470) Materials : Polymers
(230.3720) Optical devices : Liquid-crystal devices

ToC Category:
Research Papers

Original Manuscript: December 17, 2004
Revised Manuscript: January 11, 2005
Published: January 24, 2005

Yi-Hsin Lin, Hongwen Ren, Yung-Hsun Wu, Xiao Liang, and Shin-Tson Wu, "Pinning effect on the phase separation dynamics of thin polymer-dispersed liquid crystals," Opt. Express 13, 468-474 (2005)

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