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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 6 — Mar. 12, 2012
  • pp: 6448–6455

Enhancement of electro-optic properties in liquid crystal devices via titanium nanoparticle doping

Yong-Seok Ha, Hyung-Jun Kim, Hong-Gyu Park, and Dae-Shik Seo  »View Author Affiliations

Optics Express, Vol. 20, Issue 6, pp. 6448-6455 (2012)

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We investigated the properties of nematic liquid crystal device (NLC) doped with titanium (Ti) nanoparticle (~100nm). The electro-optic (EO) properties of LCs changed according to Ti nanoparticle doping concentration. Ti nanoparticles in the NLC cells focused the electric field flux and strengthened the electric field. Further, Ti nanoparticles in NLC molecules may trap charged ionic impurities and suppress the screen effect, leading to a stronger electric field and the van der Waals dispersion interactions between NLC molecules and the alignment layers. We also simulated the boundary conditions of the Ti nanoparticles in the electric field using Ansoft Maxwell software. Our experimental results agreed with the phenomenon predicted by software simulation based on general physical theory. Synthetically, at a 1.0 wt. % Ti nanoparticle doping concentration, the NLC cells showed the best EO properties, such as a low threshold voltage (1.25V), fast response time (13.2ms), and low pretilt angle (3.90°).

© 2012 OSA

OCIS Codes
(000.2690) General : General physics
(160.3710) Materials : Liquid crystals
(230.3720) Optical devices : Liquid-crystal devices
(160.4236) Materials : Nanomaterials

ToC Category:
Optical Devices

Original Manuscript: January 18, 2012
Revised Manuscript: February 22, 2012
Manuscript Accepted: March 1, 2012
Published: March 5, 2012

Yong-Seok Ha, Hyung-Jun Kim, Hong-Gyu Park, and Dae-Shik Seo, "Enhancement of electro-optic properties in liquid crystal devices via titanium nanoparticle doping," Opt. Express 20, 6448-6455 (2012)

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