Transactions on Electrical and Electronic Materials

  • 제3권4호
  • /
  • Pages.36-40
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  • 2002
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  • 1229-7607(pISSN)
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  • 2092-7592(eISSN)
한국전기전자재료학회 (The Korean Institute of Electrical and Electronic Material Engineers)
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Polar Anchoring Strength and Surface Ordering in NLC by the Washing Process on Rubbed Polymer Surfaces Containing Trifluoromethyl Moiety

  • Lee, Sang-Keuk (Department of Electrical Engineering, College of Engineering, Kwangwoon University) ;
  • Lee, Joon-Ung (Korean Institute of Electrical and Electronic Materials) ;
  • Han, Jeong-Min (Department of Electrical and Electronic Engineering (A-226), College of Engineering, Yonsei University) ;
  • Hwang, Jeoung-Yeon (Department of Electrical and Electronic Engineering (A-226), College of Engineering, Yonsei University) ;
  • Seo, Dae-Shik (Department of Electrical and Electronic Engineering (A-226), College of Engineering, Yonsei University) ;
  • Paek, Seung-Kwon (School of Electronic and Telecommunication Engineering, College of Engineering, Inje University)
  • 발행 : 2002.12.01
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초록

The polar anchoring strength and surface ordering in a NLC,4-n-pentyl-4'-cyanobiphenyl (5CB), on a rubbed polyimide (PI) surface containing trifluoromethyl moiety were studied. The large extrapolation length de of 5CB for washing process of water was measured at RS=114 mm. The polar anchoring energy of 5CB on the rubbed PI surface is decreased by the washing process. Also, the polar anchoring energy of 5CB increases with the rubbing strength on the PI surface. The surface ordering of 5CB for all washing processes is smaller than the non-washing process; it is attributed to the washing process.

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참고문헌

  1. H. Matsuda, D.-S. Seo, N. Yoshida, K. Fujibayashi,and S. Kobayashi, 'Estimation of the staticelectricity and optical retardation produced by the rubbing polyimide and polyamide films with different fabrics', Mol. Cryst. Liq. Cryst., Vol. 264,p. 23,1995 https://doi.org/10.1080/10587259508037298
  2. D.-S. Seo, K. Muroi, T. Isogami, H. Matsuda, and S.Kobayashi, 'Polar anchoring strength and itstemperature dependence of nematic liquid crystal, 5CB, aligned on rubbed polystyrene films', Jpn. JAppl. Phys., Vol. 31, No. 7, p. 2165, 1992 https://doi.org/10.1143/JJAP.31.2165
  3. D.-S. Seo, Y. Iimura, and S. Kobayashi,'Temperature dependence of the polar anchoring strength of weakly rubbed polyimide filmsfor nematic liquid crystal (5CB)' , Appl. Phys.Lett.,Vol.61,P.234, 1992 https://doi.org/10.1063/1.108194
  4. D.-S. Seo and S. Kobayashi, 'Effect of high pretiltangle for anchoring strength in nematic liquidcrystal on rubbed polyimide surface containingtrifluoromethyl moieties', Appl. Phys. Lett., Vol. 66,p.1202,1995 https://doi.org/10.1063/1.113236
  5. D.-S. Seo, 'Effects of surface order parameter on polar anchoring energy in NLC on weakly rubbed polyimide surface', J. of KIEEME(in Korean), Vol.11, No. 12, p. 1128,1998
  6. J.-Y. Hwang, D.-S. Seo, E.-J. Hahn, and J.-H. Kim,'Liquid crystal alignment effects for the photo-aligned VA-LCD on the photo-polymer', Trans. onEEM, Vol. 1, No. 3, P. 10, 2000
  7. Y.-M. Jo, J.-Y. Hwang, D.-S. Seo, and S.-K. Lee,'Alignment effects for nematic liquid crystal on anew diamond-like carbon layer', Trans. on EEM,Vol. 3, No. 2, p. 1, 2002
  8. D.-S. Seo, S. Kobayashi, D.-Y. Kang, and H.Yokoyama, 'Effects of rubbing and temperature dependence of polar anchoring strength of homogeneously aligned nematic liquid crystal onpolyimide Langmuir-Blodgett orientation films',Jpn. J. Appl. Phys., Vol. 34, No. 7A. p. 3607, 1995 https://doi.org/10.1143/JJAP.34.3607
  9. D.-S. Seo, K. Araya, N. Yoshida, M. Nishikawa, Y.Yabe, and S. Kobayashi, 'Effect of the polymer tiltangle for generation of pretilt angle in nematicliquid crystal on rubbed polyimide surfaces', Jpn. J.Appl. Phys., Vol. 34, No. 4B, p. L503, 1995 https://doi.org/10.1143/JJAP.34.L503
  10. D.-S. Seo, M. Nishikawa, Y. Yabe, and S.Kobayashi, 'Effect of the molecular structure of weakly rubbed organic solvent soluble polyimide with thfluoromethyl moieties on anchoring strength of liquid crystals', Jpn. J. Appl. Phys., Vol. 34, p.L1214,1995 https://doi.org/10.1143/JJAP.34.L1214
  11. D.-S. Seo and S. Kobayashi, 'Effect of working on the aligning capability of liquid crystals on the rubbed polymer surfaces', J. Appl. Phys., Vol. 86,No. 7,p. 4046,1999 https://doi.org/10.1063/1.371327