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Liquid Crystalline Amorphous Blue Phase: Tangled Topological Defects, Polymer-stabilization, and Device Application

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2015, PHD, Kent State University, College of Arts and Sciences / Chemical Physics.
Blue phases arise from self-assembly of short-pitch chiral nematic liquid crystals by three- dimensional topological defects in thermodynamic equilibria for periodic cubic-type blue phases and aperiodic amorphous blue phase. Although its structure has been theoretically predicted, the mysterious entanglement of disclinations in amorphous blue phase has not been thoroughly investigated because of its thermodynamic instability with narrow temperature range. This dissertation is focused on several aspects in the liquid crystalline amorphous blue phase such as three-dimensional self-assembled nanostructure consisting of tangled disclinations, wide temperature amorphous blue phase by help of photo-polymerized polymer network, and electro-optical properties after the stabilization. Furthermore, the polymer network manifests the imitation of internal defect structure of amorphous blue phase, which enables to observe the visualized structure of disclinations by breaking the paradox retaining the internal defect structure. Also, refilling achiral nematic liquid crystals to the fabricated polymer templates gives rise to induced stabilized blue phases. The author believes such studies will contribute to the fields of blue phase liquid crystal physics, electro-optical device application, and polymer template fabrication.
Liang-Chy Chien (Committee Chair)
Antal Jakli (Committee Member)
Deng-Ke Yang (Committee Member)
Seung Hee Lee (Committee Member)
Robert Twieg (Committee Member)
138 p.

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Citations

  • Kim, M. S. (2015). Liquid Crystalline Amorphous Blue Phase: Tangled Topological Defects, Polymer-stabilization, and Device Application [Doctoral dissertation, Kent State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=kent1448894363

    APA Style (7th edition)

  • Kim, Min Su. Liquid Crystalline Amorphous Blue Phase: Tangled Topological Defects, Polymer-stabilization, and Device Application. 2015. Kent State University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=kent1448894363.

    MLA Style (8th edition)

  • Kim, Min Su. "Liquid Crystalline Amorphous Blue Phase: Tangled Topological Defects, Polymer-stabilization, and Device Application." Doctoral dissertation, Kent State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=kent1448894363

    Chicago Manual of Style (17th edition)