Multidirectional alignment of liquid crystals on polystyrene surface

Chul Ho Ok, Kang Min Lee, Byoung Yong Kim, Hong Gyu Park, Young Hwan Kim, Jeong Yeon Hwang, Dae Shik Seo, Jeong Min Han

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The dipole-dipole interaction between liquid crystals (LCs) and a polystyrene (PS) surface induced by ion beam (IB) irradiation was successfully studied. The LC molecular orientation follows the IB alignment direction on the PS surface, upon IB irradiation or rubbing. The LC orientation on the PS surface is fixed by IB irradiation and is not affected by rubbing. Also, the LC alignment direction depends strongly on the C=O bonds formed from the C=C and C-C bonds on the PS surface that are broken by the IB irradiation. The LC alignment induced by IB irradiation on the PS surface using dipole-dipole interaction between the LCs and the PS surface is more strongly affected by the chemical bonding of broken chains than by physical processes such as the microgroove effect and π-π interaction. Furthermore, the anchoring strength of LCs on the PS surface upon IB irradiation is stronger than that of the PS surface upon rubbing as indicated by the LC orientation direction.

Original languageEnglish
Article number120220
JournalJapanese journal of applied physics
Volume48
Issue number12
DOIs
Publication statusPublished - 2009 Dec 1

Fingerprint

Liquid crystals
Polystyrenes
polystyrene
Ion beams
liquid crystals
alignment
ion beams
Irradiation
irradiation
dipoles
Crystal orientation
Molecular orientation
interactions

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Ok, C. H., Lee, K. M., Kim, B. Y., Park, H. G., Kim, Y. H., Hwang, J. Y., ... Han, J. M. (2009). Multidirectional alignment of liquid crystals on polystyrene surface. Japanese journal of applied physics, 48(12), [120220]. https://doi.org/10.1143/JJAP.48.120220
Ok, Chul Ho ; Lee, Kang Min ; Kim, Byoung Yong ; Park, Hong Gyu ; Kim, Young Hwan ; Hwang, Jeong Yeon ; Seo, Dae Shik ; Han, Jeong Min. / Multidirectional alignment of liquid crystals on polystyrene surface. In: Japanese journal of applied physics. 2009 ; Vol. 48, No. 12.
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Ok, CH, Lee, KM, Kim, BY, Park, HG, Kim, YH, Hwang, JY, Seo, DS & Han, JM 2009, 'Multidirectional alignment of liquid crystals on polystyrene surface', Japanese journal of applied physics, vol. 48, no. 12, 120220. https://doi.org/10.1143/JJAP.48.120220

Multidirectional alignment of liquid crystals on polystyrene surface. / Ok, Chul Ho; Lee, Kang Min; Kim, Byoung Yong; Park, Hong Gyu; Kim, Young Hwan; Hwang, Jeong Yeon; Seo, Dae Shik; Han, Jeong Min.

In: Japanese journal of applied physics, Vol. 48, No. 12, 120220, 01.12.2009.

Research output: Contribution to journalArticle

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