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Short-range Structure of Nematic Bent-core Mesogens

Hong, Seung Ho
http://rave.ohiolink.edu/etdc/view?acc_num=kent1271255435

Abstract Details

2010, PHD, Kent State University, College of Arts and Sciences / Department of Physics.
The fluid phases of bent-core liquid crystals exhibit remarkable properties, which are quite unlike their more traditional calamitic (rod-like) counterparts, even though the macroscopic orientational order in both systems is characterized by uniaxial symmetry. The aim of this dissertation is to use two techniques – small angle Xray scattering (SAXS) and second harmonic light scattering – to probe the local structure of the nematic phase in certain BCLCs that exhibit the afore-mentioned properties, and to thereby elucidate their structural origin. SAXS data obtained by us (and by other researchers) indicate that, on the scale of 10 – 100 nm, bent-core nematics are composed randomly distributed clusters of molecules with short-range smectic-C order. Since bulk smectic-C phases of BCLCs are typically ferroelectrically or antiferroelectrically layered, the question of internal and/or interfacial noncentrosymmetry associated with small smectic-C clusters in a bent-core nematic is important to address, and SH light scattering is an appropriate tool to do this. As in the SAXS studies, the SH measurements will be contrasted with data obtained on a typical calamitic nematic.
Samuel Sprunt (Committee Chair)
Brett Ellman (Committee Member)
James Gleeson (Committee Member)
Antal Jakli (Committee Member)
Robert Twieg (Committee Member)
231 p.
Physics
Nematic Bent-core liquid crystal; small angle x-ray scattering; SHG

Recommended Citations

Citations

  • Hong, S. H. (2010). Short-range Structure of Nematic Bent-core Mesogens [Doctoral dissertation, Kent State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=kent1271255435

    APA Style (7th edition)

  • Hong, Seung Ho. Short-range Structure of Nematic Bent-core Mesogens. 2010. Kent State University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=kent1271255435.

    MLA Style (8th edition)

  • Hong, Seung Ho. "Short-range Structure of Nematic Bent-core Mesogens." Doctoral dissertation, Kent State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=kent1271255435

    Chicago Manual of Style (17th edition)

kent1271255435
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This open access ETD is published by Kent State University and OhioLINK.