Bulk-induced alignment of nematic liquid crystals by photopolymerization

Jain, Sukhmal C.; Kitzerow, Heinz-S.
May 1994
Applied Physics Letters;5/30/1994, Vol. 64 Issue 22, p2946
Academic Journal
Examines a novel technique producing uniform alignment of nematic liquid crystals. Production of anisotropic polymer network by polymerizing a photoresist material; Conditions for the obtainment of uniform planar and homeotropic alignments; Details of the nematic director orientation in a planar alignment.


Related Articles

  • Distortion and unwinding of the helical structure in polymer-stabilized short-pitch ferroelectric liquid crystal. Petit, M.; Daoudi, A.; Ismaili, M.; Buisine, J. M. // European Physical Journal E -- Soft Matter;Jul2006, Vol. 20 Issue 3, p327 

    We report the effect of an anisotropic polymer network formed from an achiral photoreactive monomer in a short-pitch chiral SmC* phase on the distortion and the unwinding of the helical structure of the ferroelectric phase. The electro-optical behaviour and ferroelectric properties were...

  • A low voltage submillisecond-response polymer network liquid crystal spatial light modulator. Jie Sun; Shin-Tson Wu; Haseba, Yasuhiro // Applied Physics Letters;1/13/2014, Vol. 104 Issue 2, p023305-1 

    We report a low voltage and highly transparent polymer network liquid crystal (PNLC) with submillisecond response time. By employing a large dielectric anisotropy LC host JC-BP07N, we have lowered the V2π voltage to 23V at λ=514 nm. This will enable PNLC to be integrated with a high...

  • Optical shutter driven photochemically from anisotropic polymer network containing liquid crystalline and azobenzene molecules. Kurihara, Seiji; Masumoto, Kohji; Nonaka, Takamasa // Applied Physics Letters;7/13/1998, Vol. 73 Issue 2 

    Polymer-dispersed liquid crystal (PDLC) with macroscopically uniaxial molecular alignment containing azobenzene molecules was produced. The PDLC was transparent because of this alignment. Upon photoirradiation to cause trans-cis photoisomerization of azobenzene molecules, the PDLC became...

  • Polymer-stabilized diffraction gratings from cholesteric liquid crystals. Lee, S. N.; Chien, L. C.; Sprunt, S. // Applied Physics Letters;2/23/1998, Vol. 72 Issue 8 

    We report the use of a low concentration polymer network to stabilize electric field-induced diffraction gratings in cholesteric liquid crystals. The stabilized gratings can be electrically switched between a zero-field “on” state, which exhibits approximately 75% diffraction...

  • Dielectric Anisotropy of 5CB Liquid Crystal in a Decimeter Wavelength Range. Belyaev, B. A.; Drokin, N. A.; Shabanov, V. F.; Shepov, V. N. // Physics of the Solid State;Mar2000, Vol. 42 Issue 3, p577 

    Parallel and perpendicular components of the dielectric constant for 5CB nematic liquid crystal are measured in a relaxation region. Two frequencies �[sub 1] � 30 and �[sub 2] � 350 MHz are determined at which the inversion of the dielectric anisotropy sign is observed. It is...

  • The Influence of Anchoring Energy on the Prolate Shape of Tactoids in Lyotropic Inorganic Liquid Crystals. Kaznacheev, A. V.; Bogdanov, M. M.; Sonin, A. S. // Journal of Experimental & Theoretical Physics;Dec2003, Vol. 97 Issue 6, p1159 

    A model was constructed to describe the prolate shape of anisotropic regions, tactoids, coexisting with the isotropic phase in lyotropic inorganic liquid crystals. The elastic energy of the tactoid, the surface energy, and the interaction energy between the director field and the boundary of the...

  • Reflective homeotropic mode in a twisted nematic liquid crystal. Suh, Seong-Woo; Patel, J. S.; Lee, Sin-Doo // Applied Physics Letters;8/24/1998, Vol. 73 Issue 8 

    This letter reports on a novel liquid crystal (LC) display device capable of achromatic reflection in a twisted homeotropic configuration using a chiral nematic LC with negative dielectric anisotropy. Using the elastic continuum formalism, we arrived at simulated values for each parameter of...

  • Theory of Spherulitic Domains in Cholesteric Liquid Crystals with Positive Dielectric Anisotropy. Bogdanov, A. N. // JETP Letters;1/25/2000, Vol. 71 Issue 2, p85 

    New localized axisymmetric nonsingular solutions minimizing the Frank functional have been found for a cholesteric layer with homeotropic anchoring. They have a continuous distribution of the director field and are characterized by a convex shape. These solutions describe the so-called...

  • Approximate description of the three dimensional director and electric field in a liquid crystal... Panasyuk, G.; Allender, D. W. // Journal of Applied Physics;1/15/2000, Vol. 87 Issue 2, p649 

    Presents information on a study which developed a analytical approach for describing properties of a liquid crystal display associated with a homeotropic to multidomainlike transition for a liquid crystal with a positive dielectric anisotropy. General ideas of the description; Methods used;...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics