Energy Minimization in Nematic Liquid Crystal Systems Driven by Geometric Confinement and Temperature Gradients with Applications in Colloidal Systems

Bibliographic Details
Main Author:	Kolacz, Jakub
Language:	English
Published:	Kent State University / OhioLINK 2015
Subjects:	Chemistry Condensed Matter Physics Computer Science Physics Polymers Mathematics Materials Science liquid crystals confined geometry topology homotopy groups nematic droplet self-assembled monolayers micro-contact printing thermophoresis thermodiffusion soret colloid liquid crystal polymers kirigami projection lithography lovemonkey
Online Access:	http://rave.ohiolink.edu/etdc/view?acc_num=kent1448898699

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spelling	ndltd-OhioLink-oai-etd.ohiolink.edu-kent14488986992021-08-03T06:34:09Z Energy Minimization in Nematic Liquid Crystal Systems Driven by Geometric Confinement and Temperature Gradients with Applications in Colloidal Systems Kolacz, Jakub Chemistry Condensed Matter Physics Computer Science Physics Polymers Mathematics Materials Science liquid crystals confined geometry topology homotopy groups nematic droplet self-assembled monolayers micro-contact printing thermophoresis thermodiffusion soret colloid liquid crystal polymers kirigami projection lithography lovemonkey We first explore the topology of liquid crystals and look at the fundamental limitations of liquid crystals in confined geometries. The properties of liquid crystal droplets are studied both theoretically and through simulations. We then demonstrate a method of chemically patterning surfaces that allows us to generate periodic arrays of micron-sized liquid crystal droplets and compare them to our simulation results. The parallelizable method of self-localizing liquid crystals using 2D chemical patterning developed here has applications in liquid crystal biosensors and lens arrays.We also present the first work looking at colloidal liquid crystals under the guise of thermophoresis. We observe that strong negative thermophoresis occurs in these systems and develop a theory based on elastic energy minimization. We also calculate a Soret coefficient two orders of magnitude larger than those present in the literature. This large Soret coefficient has considerable potential for improving thermophoretic sorting mechanisms such as Thermal-Field Flow Fractionation and MicroScale Thermophoresis.The final piece of this work demonstrates a method of using projection lithography to polymerize liquid crystal colloids with a defined internal director. While still a work in progress, there is potential for generating systems of active colloids that can change shape upon external stimulus and in the generation of self-folding shapes by selective polymerization and director predetermination in the vain of micro-kirigami. 2015-12-02 English text Kent State University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=kent1448898699 http://rave.ohiolink.edu/etdc/view?acc_num=kent1448898699 unrestricted This thesis or dissertation is protected by copyright: some rights reserved. It is licensed for use under a Creative Commons license. Specific terms and permissions are available from this document's record in the OhioLINK ETD Center.
collection	NDLTD
language	English
sources	NDLTD
topic	Chemistry Condensed Matter Physics Computer Science Physics Polymers Mathematics Materials Science liquid crystals confined geometry topology homotopy groups nematic droplet self-assembled monolayers micro-contact printing thermophoresis thermodiffusion soret colloid liquid crystal polymers kirigami projection lithography lovemonkey
spellingShingle	Chemistry Condensed Matter Physics Computer Science Physics Polymers Mathematics Materials Science liquid crystals confined geometry topology homotopy groups nematic droplet self-assembled monolayers micro-contact printing thermophoresis thermodiffusion soret colloid liquid crystal polymers kirigami projection lithography lovemonkey Kolacz, Jakub Energy Minimization in Nematic Liquid Crystal Systems Driven by Geometric Confinement and Temperature Gradients with Applications in Colloidal Systems
author	Kolacz, Jakub
author_facet	Kolacz, Jakub
author_sort	Kolacz, Jakub
title	Energy Minimization in Nematic Liquid Crystal Systems Driven by Geometric Confinement and Temperature Gradients with Applications in Colloidal Systems
title_short	Energy Minimization in Nematic Liquid Crystal Systems Driven by Geometric Confinement and Temperature Gradients with Applications in Colloidal Systems
title_full	Energy Minimization in Nematic Liquid Crystal Systems Driven by Geometric Confinement and Temperature Gradients with Applications in Colloidal Systems
title_fullStr	Energy Minimization in Nematic Liquid Crystal Systems Driven by Geometric Confinement and Temperature Gradients with Applications in Colloidal Systems
title_full_unstemmed	Energy Minimization in Nematic Liquid Crystal Systems Driven by Geometric Confinement and Temperature Gradients with Applications in Colloidal Systems
title_sort	energy minimization in nematic liquid crystal systems driven by geometric confinement and temperature gradients with applications in colloidal systems
publisher	Kent State University / OhioLINK
publishDate	2015
url	http://rave.ohiolink.edu/etdc/view?acc_num=kent1448898699
work_keys_str_mv	AT kolaczjakub energyminimizationinnematicliquidcrystalsystemsdrivenbygeometricconfinementandtemperaturegradientswithapplicationsincolloidalsystems
_version_	1719439277265256448

Energy Minimization in Nematic Liquid Crystal Systems Driven by Geometric Confinement and Temperature Gradients with Applications in Colloidal Systems

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