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

References

• Arafune R, Sakamoto K, Ushioda S. Correlation between the pretilt angle of liquid crystal and the inclination angle of the polyimide backbone structure. Appl Phys Lett. 1997;71:2755–2757. DOI:10.1063/1.119566.
   Web of Science ®Google Scholar
• Ichimura K. Photoalignment of liquid-crystal systems. Chem Rev. 2000;100:1847–1874. DOI:10.1021/cr980079e.
   PubMed Web of Science ®Google Scholar
• Ho JYL, Chigrinov VG, Kwok HS. Variable liquid crystal pretilt angles generated by photoalignment of a mixed polyimide alignment layer. Appl Phys Lett. 2007;90:243506. DOI:10.1063/1.2748345.
   Web of Science ®Google Scholar
• Yaroshchuk O, Agra DMG, Zakrevskyy Y, Chien LC, Lindau J, Kumar S. Anisotropic surface morphology of azopolymer films generated by polarized UV light irradiation. Liq Cryst. 2001;28:703–707. DOI:10.1080/02678290010022137.
   Web of Science ®Google Scholar
• Park HG, Oh BY, Kim YH, Kim BY, Han JM, Hwang JY, Seo DS. No-bias-bend liquid-crystal display with an intermediate angle on blended polyimide via ion-beam irradiation. Electrochem Solid State Lett. 2009;12:J37–J39. DOI:10.1149/1.3074331.
   Web of Science ®Google Scholar
• Chaudhari P, Lacey J, Doyle J, Galligan E, Lien SCA, Callegari A, Hougham G, Lang ND, Andry PS, John R, Yang KH, Lu M, Cai C, Speidell J, Purushothaman S, Ritsko J, Samant M, Stöhr J, Nakagawa Y, Katoh Y, Saitoh Y, Sakai K, Satoh H, Odahara S, Nakano H, Nakagaki J, Shiota Y. Atomic-beam alignment of inorganic materials for liquid-crystal displays. Nature. 2001;411:56–59. DOI:10.1038/35075021.
   PubMed Web of Science ®Google Scholar
• Stohr J, Samant MG, Luning J, Callegari AC, Chaudhari P, Doyle JP, Lacey JA, Lien SA, Purushothaman S, Speidell JL. Liquid crystal alignment on carbonaceous surfaces with orientational order. Science. 2001;292:2299–2302. DOI:10.1126/science.1059866.
   PubMed Web of Science ®Google Scholar
• Janning JL. Thin film surface orientation for liquid crystals. Appl Phys Lett. 1972;21:173–174. DOI:10.1063/1.1654331.
   Web of Science ®Google Scholar
• O’Neill M, Kelly SM. Photoinduced surface alignment for liquid crystal displays. J Phys D: Appl Phys. 2000;33:R67–R84. DOI:10.1088/0022-3727/33/10/201.
   Web of Science ®Google Scholar
• Schadt M, Seiberle H, Schuster A. Optical patterning of multi-domain liquid-crystal displays with wide viewing angles. Nature. 1996;381:212–215. DOI:10.1038/381212a0.
   Web of Science ®Google Scholar
• Schadt M, Schmitt K, Kozinkov V, Chigrinov V. Surface-induced parallel alignment of liquid crystals by linearly polymerized photopolymers. Jpn J Appl Phys. 1992;31:2155–2164. DOI:10.1143/JJAP.31.2155.
   Web of Science ®Google Scholar
• Lee JJ, Park HG, Han JJ, Kim DH, Seo DS. Surface reformation on solution-derived zinc oxide films for liquid crystal systems via ion-beam irradiation. J Mater Chem C. 2013;1:6824–6828. DOI:10.1039/c3tc31470g.
   Web of Science ®Google Scholar
• Kim MH, Kim JD, Fukuda T, Matsuda H. Alignment control of liquid crystals on surface relief gratings. Liq Cryst. 2000;27:1633–1640. DOI:10.1080/026782900750037194.
   Web of Science ®Google Scholar
• Kagajyo T, Fujibayashi K, Shimamura T, Okada H, Onnagawa H. Alignment of nematic liquid crystal molecules using nanometer-sized ultrafine patterns by electron beam exposure method. Jpn J Appl Phys. 2005;44:578–581. DOI:10.1143/JJAP.44.578.
   Web of Science ®Google Scholar
• Varghese S, Crawford GP, Bastiaansen CWM, de Boer DKG, Broer DJ. Microrubbing technique to produce high pretilt multidomain liquid crystal alignment. Appl Phys Lett. 2004;85:230–232. DOI:10.1063/1.1773375.
   Web of Science ®Google Scholar
• Ruetschi M, Grutter P, Funfschilling J, Guntherodt HJ. Creation of liquid crystal waveguides with scanning force microscopy. Science. 1994;265:512–514. DOI:10.1126/science.265.5171.512.
   PubMed Web of Science ®Google Scholar
• Hong C, Tang TT, Hung CY, Pan RP, Fang W. Liquid crystal alignment in nanoporous anodic aluminum oxide layer for LCD panel applications. Nanotechnology. 2010;21:285201. DOI:10.1088/0957-4484/21/28/285201.
   PubMed Web of Science ®Google Scholar
• Kim SR, Teixeira AI, Neale PF, Wendt AE, Abbott NL. Fabrication of polymeric substrates with well-defined nanometer-scale topography and tailored surface chemistry. Adv Mater. 2002;14:1468–1472. DOI:10.1002/1521-4095(20021016)14:20<1468::AID-ADMA1468>3.0.CO;2-H.
   Web of Science ®Google Scholar
• Park HG, Lee JJ, Dong KY, Oh BY, Kim YH, Jeong HY, Ju BK, Seo DS. Homeotropic alignment of liquid crystals on a nano-patterned polyimide surface using nanoimprint lithography. Soft Matter. 2011;7:5610–5614. DOI:10.1039/c1sm05083d.
   Web of Science ®Google Scholar
• Seo DS, Kobayashi S, Nishikawa M. Study of the pretilt angle for 5CB on rubbed polyimide films containing trifluoromethyl moiety and analysis of the surface atomic concentration of F/C(%) with an electron spectroscope for chemical analysis. Appl Phys Lett. 1992;61:2392–2394. DOI:10.1063/1.108174.
   Web of Science ®Google Scholar
• Hamwi A, Latouche C, Marchand V, Dupuis J, Benoit R. Perfluorofullerenes: characterization and structural aspects. J Phys Chem Solids. 1996;57:991–998. DOI:10.1016/0022-3697(95)00386-X.
   Web of Science ®Google Scholar
• Delpeux S, Beguin F, Benoit R, Erre R, Manolova N, Rashkov I. Fullerene core star-like polymers—1. Preparation from fullerenes and monoazidopolyethers. Eur Polym J. 1998;34:905–915. DOI:10.1016/S0014-3057(97)00225-5.
   Web of Science ®Google Scholar
• Kim SG, Kim SM, Kim YS, Lee HK, Lee SH, Lyu JJ, Kim KH, Lu R, Wu ST. Trapping of defect point to improve response time via controlled azimuthal anchoring in a vertically aligned liquid crystal cell with polymer wall. J Phys D: Appl Phys. 2008;41:055401. DOI:10.1088/0022-3727/41/5/055401.
   Web of Science ®Google Scholar
• Lee YJ, Kim YK, Jo SI, Bae KS, Choi BD, Kim JH, Yu CJ. Fast vertical alignment mode with
continuous multi-domains for a liquid
crystal display. Opt Express. 2009;17:23417–23422. DOI:10.1364/OE.17.023417.
   PubMed Web of Science ®Google Scholar
• Kang H, Park JS, Sohn EH, Kang D, Rosenblatt C, Lee JC. Polyimide blend alignment layers for control of liquid crystal pretilt angle through baking. Polymer. 2009;50:5220–5227. DOI:10.1016/j.polymer.2009.09.023.
   Web of Science ®Google Scholar
• Nie X, Lu R, Xianyu H, Wu TX, Wu ST. Anchoring energy and cell gap effects on liquid crystal response time. J Appl Phys. 2007;101:103110. DOI:10.1063/1.2734870.
   Web of Science ®Google Scholar