Skip to Main Content
Frequently Asked Questions
Submit an ETD
Global Search Box
Need Help?
Keyword Search
Participating Institutions
Advanced Search
School Logo
Files
File List
Bergquist_Dissertation.pdf (6.8 MB)
ETD Abstract Container
Abstract Header
Chirality in liquid crystals - from bent-cores to chromonics
Author Info
Bergquist, Leah Elaine
ORCID® Identifier
http://orcid.org/0000-0002-0282-7488
Permalink:
http://rave.ohiolink.edu/etdc/view?acc_num=kent1511897907175184
Abstract Details
Year and Degree
2017, PHD, Kent State University, College of Arts and Sciences / Chemical Physics.
Abstract
Chirality is a central scientific concept but its superstructural and nanoscale manifestation are not well understood, severely limiting the potential of materials in a range of emerging applications. In the first part of this dissertation, we examine a lyotropic chromonic liquid crystal (LCLC) forming a nematic phase for its more intense response to gold nanoparticles capped with chiral
L
-cysteine ligand molecules than to their free molecular counterparts. We show that such nanoparticles induce a tighter chiral twist within, and similar among, the stacks of nematic LCLCs but with several orders of magnitude fewer chiral molecules. The second part of this dissertation focuses on the SmCP phase and the development of an optically isotropic antiferroelectric liquid crystal (OI-AFLC) display mode. This report describes in detail the synthesis and characterization of a series bent-core liquid crystal (LC) systems. Multi-component mixtures of these compounds achieved room temperature switching between optically isotropic and birefringent states; several mixtures displayed a modulated SmC
a
P
A
phase extending from below -40 °C up to about 100 °C. Requiring high fields and showing slow switching speeds, their utility is found in non-video-rate switching applications requiring high contrast.
Committee
Torsten Hegmann, Dr. (Advisor)
Antal Jákli, Dr (Committee Member)
Oleg Lavrentovich, Dr. (Committee Member)
Mann Elizabeth, Dr. (Committee Member)
Paul Sampson, Dr. (Committee Member)
Pages
197 p.
Subject Headings
Chemistry
;
Materials Science
;
Physics
Keywords
chirality, chromonic, liquid crystal, bent core, chiral induction, liquid crystal display, nanoparticle
Recommended Citations
Refworks
EndNote
RIS
Mendeley
Citations
Bergquist, L. E. (2017).
Chirality in liquid crystals - from bent-cores to chromonics
[Doctoral dissertation, Kent State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=kent1511897907175184
APA Style (7th edition)
Bergquist, Leah.
Chirality in liquid crystals - from bent-cores to chromonics.
2017. Kent State University, Doctoral dissertation.
OhioLINK Electronic Theses and Dissertations Center
, http://rave.ohiolink.edu/etdc/view?acc_num=kent1511897907175184.
MLA Style (8th edition)
Bergquist, Leah. "Chirality in liquid crystals - from bent-cores to chromonics." Doctoral dissertation, Kent State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=kent1511897907175184
Chicago Manual of Style (17th edition)
Abstract Footer
Document number:
kent1511897907175184
Download Count:
352
Copyright Info
© 2017, some rights reserved.
Chirality in liquid crystals - from bent-cores to chromonics by Leah Elaine Bergquist is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. Based on a work at etd.ohiolink.edu.
This open access ETD is published by Kent State University and OhioLINK.