한국정보디스플레이학회:학술대회논문집
- 2005.07a
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- Pages.558-561
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- 2005
Vertically Aligned Nematics at Polymer interfaces and Its device implications
- Srinivasarao, Mohan (School of Polymer, Textile and Fiber Engineering, Center for Advanced Research on Optical Microscopy, School of Chemistry and Biochemistry Georgia Institute of Technology) ;
- Park, Jung-Ok (Center for Advanced Research on Optical Microscopy, School of Polymer, Textile and Fiber Engineering, Georgia Institute of Technology) ;
- Zhou, Jian (School of Chemistry and Biochemistry, Georgia Institute of Technology)
- Published : 2005.07.19
Abstract
In-situ photopolymerization of alkyl acrylate monomers in the presence of a nematic fluid provides a cellular matrix of liquid crystalline droplets in which the chemical structure of the encapsulating polymer exerts control over the alignment (anchoring) of the liquid crystalline molecules. Control is obtained by variation of the alkyl side chains and through copolymerization of two dissimilar monofunctional acrylates. Two monofunctional acrylates with opposing tendencies on copolymerization provide control over the tunability of anchoring over a wide temperature range. Using various acrylates we show that a uniform vertical alignment can be achieved over a large area. Utilizing this technique and a nematic with negative dielectric anisotropy, we have fabricated highly flexible liquid crytal based devices, with high contrast and fast response time, without using any alignment layer.
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