Anisotropic reactive mesogens transfer onto polyimides-mixture layer via imprinting method for continuous pretilt angle control

Hak Moo Lee, Hong Gyu Park, Hae Chang Jeong, Dae Shik Seo

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We present a new approach for the alignment process to orient liquid crystal (LC) molecules. The process consists of fabrication of a stamp composed of reactive mesogens (RMs), transfer of RM from the stamp onto polyimide (PI) layers, and LC device fabrication using the resulting RM/PI layers. The RM stamp was made anisotropic by a rubbing treatment, and this anisotropy was transferred to the PI layers via contact imprinting, leading to an achievement of uniform LC alignment. In addition, the pretilt angle of the LC molecules could be controlled by varying the content of homogeneous PI in the PI layers. We describe the effects of high pretilt angle upon the electro-optical (EO) characteristics of twisted-nematic (TN) cells based on the RM transfer film/blended PI layers.

Original languageEnglish
Pages (from-to)174-180
Number of pages7
JournalLiquid Crystals
Volume42
Issue number2
DOIs
Publication statusPublished - 2015 Feb 1

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polyimides
Polyimides
Liquid Crystals
Liquid crystals
liquid crystals
alignment
Fabrication
fabrication
Molecules
molecules
Anisotropy
anisotropy
cells

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

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abstract = "We present a new approach for the alignment process to orient liquid crystal (LC) molecules. The process consists of fabrication of a stamp composed of reactive mesogens (RMs), transfer of RM from the stamp onto polyimide (PI) layers, and LC device fabrication using the resulting RM/PI layers. The RM stamp was made anisotropic by a rubbing treatment, and this anisotropy was transferred to the PI layers via contact imprinting, leading to an achievement of uniform LC alignment. In addition, the pretilt angle of the LC molecules could be controlled by varying the content of homogeneous PI in the PI layers. We describe the effects of high pretilt angle upon the electro-optical (EO) characteristics of twisted-nematic (TN) cells based on the RM transfer film/blended PI layers.",
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Anisotropic reactive mesogens transfer onto polyimides-mixture layer via imprinting method for continuous pretilt angle control. / Lee, Hak Moo; Park, Hong Gyu; Jeong, Hae Chang; Seo, Dae Shik.

In: Liquid Crystals, Vol. 42, No. 2, 01.02.2015, p. 174-180.

Research output: Contribution to journalArticle

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