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Development and Characterization of Blue Phases Made From Bent-Core Liquid Crystals

Taushanoff, Stefanie
http://rave.ohiolink.edu/etdc/view?acc_num=kent1298650764

Abstract Details

2011, PHD, Kent State University, College of Arts and Sciences / Chemical Physics.
Blue phases (BP) are phases of chiral liquid crystals formed by lattices of double-twist cylinders with corresponding lattices of disclination lines. The conditions under which such an arrangement is energetically favorable generally occur in only a narrow band of temperature ranges, commonly less than 2C. Several methods have been devised to expand this range, notably polymer stabilization or nanoparticle stabilization. In addition, there is interest in using unconventionally shaped liquid crystals to form blue phases as molecular biaxiality is expected to help stabilize the phase. Here, we explore the potential of bent-core liquid crystals in creating stable blue phase materials with broad temperature ranges. It is known that the presence of achiral bent-core molecules in a chiral nematic material can induce blue phases where none were previously observed, and that liquid crystal dimers with a flexible center can create broad-temperature blue phases. Here we develop broad-temperature blue phase materials using bent-core nematic liquid crystals and chiral dopants, resulting in the first known example of a broad-range BPIII. Additional methods of phase stabilization are utilized in an attempt to increase the temperature range of the phase to encompass room temperatures.
Antal Jakli, PhD (Advisor)
Hiroshi Yokoyama, PhD (Committee Member)
Liang-Chy Chien, PhD (Committee Member)
Robert Twieg, PhD (Committee Member)
E.C. Gartland, PhD (Committee Member)
130 p.
Materials Science
liquid crystal; chiral; blue phase; BPIII; lovemonkey; nanoparticle stabilization; polymer stabilization; bent-core; bent core; banana; bent core liquid crystal

Recommended Citations

Citations

  • Taushanoff, S. (2011). Development and Characterization of Blue Phases Made From Bent-Core Liquid Crystals [Doctoral dissertation, Kent State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=kent1298650764

    APA Style (7th edition)

  • Taushanoff, Stefanie. Development and Characterization of Blue Phases Made From Bent-Core Liquid Crystals. 2011. Kent State University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=kent1298650764.

    MLA Style (8th edition)

  • Taushanoff, Stefanie. "Development and Characterization of Blue Phases Made From Bent-Core Liquid Crystals." Doctoral dissertation, Kent State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=kent1298650764

    Chicago Manual of Style (17th edition)

kent1298650764
1,773
© 2011, all rights reserved.
This open access ETD is published by Kent State University and OhioLINK.