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Dissertations / Theses on the topic 'Liquid crystal phase of soaps'

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Published: 4 June 2021

Last updated: 6 February 2022

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1

Barron, Christopher. "Conformational studies of lithium phenyl stearate." Thesis, Sheffield Hallam University, 1991. http://shura.shu.ac.uk/19323/.

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The structure and conformation of lithium phenyl stearate (and to a lesser extent, for comparative purposes, cadmium stearate) was investigated using Fourier transform infrared spectroscopy, and various modelling techniques. The infrared results for LiPS show that the aliphatic portion of the soap molecule is much more ordered at room temperature than had been expected, having only 0.62 and 0.60 gtg and gg defects per molecule respectively, where an isotropic chain would have 1.35 and 1.21 gtg and gg defects per chain respectively. As the temperature is increased the number of conformational d

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2

Mercer, Carolyn Regan. "Liquid crystal point diffraction interferometer." Diss., The University of Arizona, 1995. http://hdl.handle.net/10150/187127.

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A new instrument, the liquid crystal point diffraction interferometer (LCPDI), has been developed for the measurement of phase objects. This instrument maintains the compact, robust design of Linnik's point diffiaction interferometer (PDI) and adds to it phase stepping capability for quantitative interferogram analysis. The result is a compact, simple to align, environmentally insensitive interferometer capable of accurately measuring optical wavefronts with very high data density and with automated data reduction. This dissertation describes the theory of both the PDI and liquid crystal phase

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3

Li, Yan. "High-efficiency Blue Phase Liquid Crystal Displays." Doctoral diss., University of Central Florida, 2012. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5399.

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Blue phase liquid crystals (BPLCs) have a delicate lattice structure existing between chiral nematic and isotropic phases, with a stable temperature range of about 2 K. But due to short coherent length, these self-assembled nano-structured BPLCs have a fast response time. In the past three decades, the application of BPLC has been rather limited because of its narrow temperature range. In 2002, Kikuchi et al. developed a polymer stabilization method to extend the blue-phase temperature range to more than 60 K. This opens a new gateway for display and photonic applications. In this dissertatio

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4

Rao, Linghui. "Low Voltage Blue Phase Liquid Crystal Displays." Doctoral diss., University of Central Florida, 2012. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5448.

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From cell phones, laptops, desktops, TVs, to projectors, high reliability LCDs have become indispensable in our daily life. Tremendous progress in liquid crystal displays (LCDs) has been made after decades of extensive research and development in materials, device configurations and manufacturing technology. Nowadays, the most critical issue on viewing angle has been solved using multidomain structures and optical film compensation. Slow response time has been improved to 2-5 ms with low viscosity LC material, overdrive and undershoot voltage, and thin cell gap approach. Moving image blur ha

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5

Wincure, Benjamin 1966. "Computational modeling of a liquid crystal phase transition." Thesis, McGill University, 2007. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=103308.

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This thesis numerically solves the tensor order parameter continuum theory equations for nematic liquid crystals to investigate liquid crystal texturing mechanisms during an isotropic to nematic phase transition in a bulk unstable isotropic phase and next to solid surfaces. The Time Dependent Ginsburg Landau equation with a Landau de Gennes Helmholtz free energy density description is used to predict the shapes, textures and defect mechanisms that occur in the expanding droplets and films of a 4'-pentyl-4-cyanobiphenyl (5CB) nematic phase immediately after their nucleation from an unstable iso

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6

Powell, Norman James. "The modelling of nematic liquid crystal phase devices." Thesis, Durham University, 1993. http://etheses.dur.ac.uk/5749/.

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The implementation of nematic liquid crystal optical devices, which exploit the voltage dependent, optical path length modification of the electrical Freedrichsz transition, is presented. By combining refractive elements in a diffractive zone structure, efficient and flexible devices with relatively high refractive powers can be constructed. Continuously variable optical properties can be achieved by scaling the optical profile of the refractive elements and applying a phase correction to ensure that the transition between adjacent zones is an integral number of wavelength, hence a continuous

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7

Zhang, Zichen. "Phase-only nematic liquid crystal on silicon devices." Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610052.

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8

Tian, Linan. "Liquid crystal blue phase for electro-optic displays." Thesis, University of Manchester, 2014. https://www.research.manchester.ac.uk/portal/en/theses/liquid-crystal-blue-phase-for-electrooptic-displays(0230a0fd-6cbb-4edb-a626-ae981fe75141).html.

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Liquid crystals are a vast and diverse class of materials which ranges from fluids made up of simple rods, polymers and solutions, to elastomers and biological organisms. Liquid crystal phases are neither crystalline, nor a ‘normal’ isotropic liquid, but lie somewhere in between these two common states of matter. Liquid crystals have found enormous use in display devices due to their electro-optic properties. In this thesis, the optical and electro-optical properties of some chiral liquid crystalline phases are studied. The optical and electro-optical behaviour of liquid crystalline blue phase

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9

Wang, Haiying. "STUDIES OF LIQUID CRYSTAL RESPONSE TIME." Doctoral diss., University of Central Florida, 2005. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3541.

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In this dissertation, the response time issue of the liquid crystal (LC) devices is investigated in meeting the challenges for display and photonic applications. The correlation between the LC director response time and the optical response time is derived theoretically and confirmed experimentally. A major contribution of this thesis is that, based on the small angle approximation, we derive rigorous analytical solutions for correlating the LC director response time to its consequent optical response times (both rise and decay) of a vertical-aligned nematic LC cell. This work successfully fil

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10

Lin, Yi-Hsin. "POLARIZATION-INDEPENDENT LIQUID CRYSTAL DEVICES." Doctoral diss., University of Central Florida, 2006. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4199.

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Liquid crystal (LC) devices can be operated as amplitude modulators and phase modulators. LC amplitude modulation is commonly used in liquid crystal display (LCD) while phase-only modulation is useful for laser beam steering, tunable grating, prism, lens, and other photonic devices. Most LC devices are polarization dependent and require at least one polarizer. As a result, the optical efficiency is low. To enhance display brightness, a power hungry backlight has to be used leading to a high power consumption and short battery life. In a LC phase modulator, the polarization dependent property c

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11

Al-Zangana, Shakhawan. "Nano- and micro-particle doped liquid crystal phases." Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/nano-and-microparticle-doped-liquid-crystal-phases(31dbb051-7d9c-4780-bda0-d58773846de0).html.

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This thesis presents the investigation of the liquid crystal (LC) - particle suspensions. Particles from nano- to micro-size, spherical to two-dimensional shapes, with different functionality are dispersed into nematic and smectic phases. The aim is to create ordered nanoparticle (NP) assemblies and thereby modify the common properties of the liquid crystal, such as dielectric anisotropy and electro-optical, revealing any interaction between particles and LC properties. It is found that for concentrations (>0.5vol%), the ferroelectric NPs have increased the sensitivity of the nematic liquid cr

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12

Mottram, N. J. "Boundary effects in nematic liquid crystal layers." Thesis, University of Bristol, 1996. http://hdl.handle.net/1983/3f718f68-e280-4994-afa2-29a7845c73f7.

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13

Lee, Y. "Characterisation of phase modulating liquid crystal on silicon devices." Thesis, University of Edinburgh, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.653757.

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The objective of the work described in this thesis was to optimize the optical phase modulating properties of liquid crystal on silicon (LCoS) devices for non-display applications. This thesis presents the characterization of oxide two deposition processes, modelling of binary phase modulation in ferroelectric liquid crystal SLMs using electronic equivalent circuit, and characterization of multi-phase modulation in nematic liquid crystal with pulse-width modulation. For optimal optical performance of a phase modulating LCoS device, the degree of surface planarisation of the CMOS backplane has

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14

Mills, Stuart James. "A computer simulation study of liquid crystal phase coexistence." Thesis, Sheffield Hallam University, 1999. http://shura.shu.ac.uk/20065/.

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Results are presented from a variety of molecular simulations of phase coexistence using the well established Gay-Berne (GB) liquid crystal model. Firstly, the simulation of bulk phase coexistence using the Gibbs ensemble Monte Carlo technique is presented, both for one and two-component GB systems. The one-component results, using a novel parameterisation of the GB, show a rich phase behaviour, displaying both isotropic and nematic-vapour coexistence, in good comparison with previous studies. A method for arriving at the two-component parameterisation is then discussed, followed by a novel ap

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15

Manolis, Ilias G. "Electrically addressed liquid crystal phase gratings for optical switches." Thesis, University of Cambridge, 2002. https://www.repository.cam.ac.uk/handle/1810/251845.

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16

Wang, Shujun. "Liquid-liquid phase separation in an isorefractive polyethylene blend monitored by crystallization kinetics and crystal-decorated phase morphologies." Akron, OH : University of Akron, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=akron1226680911.

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Dissertation (Ph. D.)--University of Akron, Dept. of Polymer Science, 2008.<br>"December, 2008." Title from electronic dissertation title page (viewed 12/29/2008) Advisor, Stephen Z. D. Cheng; Committee members, Alexei Sokolov, Darrell H. Reneker, Gustavo A. Carri, Thein Kyu; Department Chair, Ali Dhinojwala; Dean of the College, Stephen Z. D. Cheng; Dean of the Graduate School, George R. Newkome. Includes bibliographical references.

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17

Wang, Shujun. "Liquid-Liquid Phase Separation in an Isorefractive Polethylene Blend Monitored by Crystallization Kinetics and Crystal-Decorated Phase Morphologies." University of Akron / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=akron1226680911.

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18

Starzomski, Mark Stephen. "Characterization and applications of the phase-modulating liquid crystal display." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0016/MQ48289.pdf.

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19

Bemrose, Richard Antony. "A molecular dynamics study of liquid crystal mixtures." Thesis, Sheffield Hallam University, 1999. http://shura.shu.ac.uk/19339/.

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Results are presented from molecular dynamics simulations of binary liquid crystal mixtures using a generalisation of a well established Gay-Berne intermolecular potential. The simulations are undertaken in both the microcanonical (NVE) and the isoenthalpic-isobaric (NPH) ensembles. Firstly a 50:50 mixed system is simulated in the NVE ensemble containing generalised Gay-Berne (GGB) rod-like molecules with length to breadth axial ratios of 3.5:1 (molecules A) and 3:1 (molecules B). The molecules in this system differs only slightly from the well-characterised Gay-Berne (GB) potential with lengt

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20

Jamali, Afsoon Jamali. "LARGE AREA TUNABLE LIQUID CRYSTAL LENS." Kent State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=kent1541671894328594.

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21

Corkery, Robert, and robert corkery@anu edu au. "Artificial biomineralisation and metallic soaps." The Australian National University. Research School of Physical Sciences and Engineering, 1998. http://thesis.anu.edu.au./public/adt-ANU20080124.190014.

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In this thesis, geometry is used as a basis for conducting experiments aimed at growing and arranging inorganic minerals on curved interfaces. Mineralisation is directed using crystalline and liquid-crystalline metallic soaps and surfactant/water systems as templates.¶ A review of the history, syntheses, structure and liquid crystallinity of metallic soaps and other amphiphiles is presented as a foundation to understanding the interfacial architectures in mesostructured template systems in general.¶ In this study, a range of metallic soaps of varying chain length and cation type are synthesise

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22

Chen, Kuan Ming. "Submillisecond-response blue phase liquid crystals for display applications." Doctoral diss., University of Central Florida, 2012. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5158.

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With exploding growth of information exchanges between people, display has become indispensable in our daily lives. After decades of intensive research and development in materials and devices, and massive investment in manufacturing technologies, liquid crystal display (LCD) has overcome various obstacles and achieved the performance we need, such as wide viewing angle, high contrast ratio, and high resolution, etc. These excellent performances make LCD prevailed in every perspective. Recently, with the demands of energy conservation, a greener LCD with lower power consumption is desired. In

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23

Huang, Tsang-Min. "Phase Equilibria of Binary Liquid Crystal Mixtures Involving Induced Ordered Phases." University of Akron / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=akron1284381816.

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24

Nishiyama, Isa. "The effect of chirality on ferroelectric and related liquid crystal systems." Thesis, University of Hull, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.307759.

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25

Drake, Philip. "The development of quartz crystal microbalance based chemical sensors." Thesis, University of Bath, 2000. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.323573.

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26

Kelly, Thu-Lan. "Liquid crystal spatial light modulators as computer controlled optical elements /." Title page, contents and abstract only, 1997. http://web4.library.adelaide.edu.au/theses/09PH/09phk298.pdf.

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27

Kasch, Nicholas. "Liquid crystal-polymer composites and the stabilisation of defect phases." Thesis, University of Manchester, 2015. https://www.research.manchester.ac.uk/portal/en/theses/liquid-crystalpolymer-composites-and-the-stabilisation-of-defect-phases(ee813754-56cd-493c-a631-d58b06d03c00).html.

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A simple method for increasing the stable temperature range of the liquid crystalline blue phase is demonstrated, by mixing a non-mesogenic polymer of low molecular weight into the blue phase material. In a mixture of cholesteryl benzoate and cholesteryl nonanoate the addition of polystyrene increased the stable blue phase range from 0.5K to 12K. This was measured strictly on heating from the chiral nematic phase through the blue phase in order to minimise non-equilibrium effects, and is one of the largest ranges so measured. The stability range can be closely tuned by changing the polymer con

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28

Sigdel, Krishna P. "Phase transition studies of liquid crystal colloids with solvents and nano-solids." Digital WPI, 2011. https://digitalcommons.wpi.edu/etd-dissertations/137.

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Liquid crystals (LCs) are anisotropic fluids that exhibit numerous thermodynamically stable phases in between an isotropic liquid and a three-dimensionally ordered solid. In their simplest ordered phase, the nematic, LCs show orientational order due to molecular self assembly and at the same time maintaining fluid flow properties. In the smectic phase, they show both orientational and partial translational order characterized by a 1-d density wave. Liquid crystalline substances have been extensively studied due to their applications and as important physical models of self-assembly. The effect

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29

Jang, Yong-Kyu. "ADVANCED UNDERSTANDING OF THE OPTICAL PROPERTIES IN PHASE COMPENSATED LIQUID CRYSTAL DEVICES." Kent State University / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=kent1185484614.

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30

JUSTICE, RYAN SCOTT. "INTERFACE MORPHOLOGY AND PHASE SEPARATION IN POLYMER DISPERSED LIQUID CRYSTAL (PDLC) COMPOSITES." University of Cincinnati / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1163783056.

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31

Hanna, Simon. "Structure and phase transitions of some crystalline and liquid crystalline aromatic polyesters." Thesis, University of Cambridge, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.277892.

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32

Swanson, Brian D. "Surface freezing and surface induced ordering in liquid crystal films /." Thesis, Connect to this title online; UW restricted, 1992. http://hdl.handle.net/1773/9678.

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Thesis (Ph. D.)--University of Washington, 1992.<br>Vita. Accompanying video is in VHS Format and contains illustrations of observations described in chapter 2. Includes bibliographical references (leaves [222]-232).

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33

Gardner, Mark Charles. "Phase object pattern recognition by optical correlation using a liquid crystal display for spatial phase modulation." Thesis, University College London (University of London), 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.409700.

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34

Yu, Hao. "Liquid Crystal Flat Optical Elements Enabled by Molecular Photopatterning with Plasmonic Metamasks." Kent State University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=kent1595196794159313.

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35

Roshi, Aleksander. "Quenched Random Disorder Studies In Liquid Crystal + Aerosil Dispersions." Link to electronic thesis, 2005. http://www.wpi.edu/Pubs/ETD/Available/etd-042705-123130/.

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Dissertation (Ph.D.) -- Worcester Polytechnic Institute.<br>Keywords: smectic-A to smectic-C; nematic to smectic-A; isotropic-nematic; phase transition; quenched random disorder; liquid crystal; gel structure; turbidity; gel dynamics; x-ray intensity fluctuation spectroscopy ( XIFS ); ac-calorimetry; x-ray diffraction Includes bibliographical references (p. 210-218).

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36

Rigby, Adam. "The computer simulation of discotic and rod-like phase transitions for a range of molecular shapes and sizes." Thesis, University of Manchester, 2015. https://www.research.manchester.ac.uk/portal/en/theses/the-computer-simulation-ofdiscotic-and-rodlike-phasetransitions-for-a-range-ofmolecular-shapes-and-sizes(9c5b9645-e4c2-440a-b0ec-3533636dd1e9).html.

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In 1970, Freiser made the theoretical prediction that a biaxial nematic phase could exist. In auniaxial nematic, only one particle axis is aligned but with a biaxial nematic, all three molecular axes are aligned. This phase is expected to occur for particle whose shape is intermediate between that of a disc and a rod. Board and bent-core particles are examples of such structures. Despite extensive experimental investigation, however, very few biaxial nematic systems have been found. Yu and Saupe [21] have shown the occurrence of a biaxial nematic phase generated for a lyotropic system. Similar

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37

Liu, Yifan. "High Performance Three-Dimensional Display Based on Polymer-Stabilized Blue Phase Liquid Crystal." Doctoral diss., University of Central Florida, 2014. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/6309.

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Autostereoscopic 2D/3D (two-dimension/three-dimension) switchable display has been attracting great interest in research and practical applications for several years. Among different autostereoscopic solutions, direction-multiplexed 3D displays based on microlens array or parallax barrier are viewed as the most promising candidates, due to their compatibility with conventional 2D display technologies. These 2D/3D switchable display system designs rely on fast switching display panels and photonics devices, including adaptive focus microlens array and switchable slit array. Polymer-stabilized b

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38

Chen, Horng-Ying, and 陳虹穎. "Phase transition in ferroelectric liquid crystal." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/01028338628113076240.

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碩士<br>國立中央大學<br>物理研究所<br>91<br>Abstract High-resolution heat-capacity measurements have been conducted near the Sm-A to Sm-C transition in free-standing films of liquid-crystal compound C7. We find that the profiles of associated heat-capacity anomalies are strongly thickness-dependent and exhibit a novel crossover behavior in reduced dimensions. This result is similar to the observed in MDW1397 liquid-crystal films. Furthermore, heat-capacity measurements have provided the direct confirmation of surface transitions from Sm-C immediately to the Sm-G phase in C7. The molecular interactions a

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39

Ramazanoglu, Mehmet Kerim Birgeneau Robert J. (supervisor). "Phase transitions in liquid crystal + aerosil gels." 2007. http://link.library.utoronto.ca/eir/EIRdetail.cfm?Resources__ID=478974&T=F.

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Li, Shau-Kuan, and 李紹寬. "Electrically controlled liquid crystal THz phase shifter." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/22486378551334704738.

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41

Liaw, Chien-Huang, and 廖乾煌. "Electrical Controllable Cholesteric Liquid Crystal Phase Grating." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/35169132696877282057.

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碩士<br>國立交通大學<br>光電工程所<br>89<br>Our previous experimental evidence has shown that the plane-parallel aligned cholesteric liquid crystal (CLC) cell has no more than two possible directions of stripe in fingerprint state. The direction of stripe is affected by the alignment direction and thickness-to-natural-pitch ratio, d/po, where d and po are cell gap and natural pitch of the cholesteric liquid crystal, respectively1. In suitable condition, homeotropic aligned CLC cell can also be in fingerprint state when abruptly switching off the applied external field. We found that the stripe direction de

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42

Lee, Chia-Chi, and 李家圻. "Study on Polymer-Stabilized Blue Phase Liquid Crystal." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/03549542568094961637.

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碩士<br>國立交通大學<br>電子物理系所<br>98<br>The Blue phase of liquid crystal is often observed in a very narrow temperature range (1~2℃) between cholesteric and isotropic phase. The temperature range can be expanded by polymerizing a mixture of monomer that could localized the at the disclination lines. This liquid crystal is called “polymer stabilized blue phase liquid crystal”. In this work, the blue phase of liquid crystal has been mixed and observed. After the monomer is polymerized by Xenon arc lamp and 410nm LED, the temperature range of blue phase is successfully expanded. The response time of cell

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Lin, Chuan-Hsien, and 林俊賢. "Electrically controlled Liquid Crystal Terahertz Tunable Phase Grating." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/78223038829134078962.

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44

Lee, Ming-Long, and 李明龍. "An optical investigation of polarization-independent liquid crystal phase modulations for twisted nematic liquid crystal mode." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/fcyajx.

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45

Lin, Chih-chung, and 林志忠. "Three dimensional photonic crystal lasing using self-assembled blue phase liquid crystal." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/89671700467279416652.

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碩士<br>國立中山大學<br>光電工程學系研究所<br>99<br>Photonic crystal is the periodic structure with different refractive index media. Its photonic-bandgap characteristics could be used to make the photonic crystal lasers. Because of the difficulty of fabrication, the development of three-dimensional photonic crystal is far behind the two-dimensional and one-dimensional photonic crystals. Blue phase liquid crystals are formed by periodic lattice structure with double-twisted cylinder, therefore it is a three-dimensional self-assembled photonic crystal. The objective in this study is to fabricate the three-dimen

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46

Wu, Cha-Kai, and 吳哲凱. "Morphology of polymer structure in blue-phase liquid crystal." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/33351917755097737227.

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碩士<br>逢甲大學<br>光電學系<br>101<br>This thesis focuses on studying the surface morphology of the polymer structure, being constructed under different liquid-crystal phases and ultra-violet light intensity: (1)low ultra-violet light intensity(~100 μW/cm2)/isotropic liquid phase; (2) low ultra-violet light intensity/amorphous blue phase; (3) low ultra-violet light intensity/cubic blue phase; (4) low ultra-violet light intensity/chrial nematic phase; (5) high ultra-violet light intensity(~5 mW/cm2)/ amorphous blue phase; (6) high ultra-violet light intensity/ cubic blue phase. In different polymerizat

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47

Chung, Cheng-Ying, and 鍾政英. "ADAPTIVE OPTICS SYSTEMS WITH LIQUID-CRYSTAL PHASE-SHIFT INTERFEROMETRY." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/40906006777288684791.

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碩士<br>國立中央大學<br>機械工程研究所<br>93<br>An adaptive optics system with liquid crystal device (LCD) phase-shift interferometry (PSI) has been developed to compensate aberration in real time. The adaptive optics system consists of three main components: wavefront sensor, wavefront corrector, and reconstruction controller. In this thesis, a Mach-Zehnder radial shearing interferometer has successfully detected the dynamic wavefront. Unlike the Sagnac setup, the Mach-Zehnder interferometer can avoid the coupling effect between the measurement wavefront and reference wavefront from the interferometry sys

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48

Li, Chien-Yu, and 李建煜. "View angle switchable display with blue phase liquid crystal." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/7u9773.

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碩士<br>國立中山大學<br>物理學系研究所<br>102<br>In this thesis, a viewing angle switchable blue phase liquid crystal (BPLC) display is demonstrated. The BPLC display comprises a FFS electrode structure on the bottom substrate and a plain electrode on the top substrate. Driving with FFS electrode on the bottom substrate, BPLC display is in the wide viewing angle mode. Simultaneously driving the cell with the top electrode and FFS bottom substrate, the LC is operated in the vertical alignment mode, in which the oblique light leakage causes the cell to have a narrow viewing angle. For the demand contrast ratio

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Huang, Cheng-Wei, and 黃誠威. "Phase Separations in Silica Nanoparticle-doped Liquid Crystal Mixtures." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/fc9255.

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碩士<br>國立交通大學<br>光電系統研究所<br>105<br>This work discusses the phase separation of silica nanoparticle-doped liquid crystal (LC) mixtures. We find that the phase separation of the LC mixtures involves the nucleation and growth of nematic domains followed by the aggregation of silica nanoparticles. The final morphology of LC mixtures after phase separation depends on the concentration and surface properties of silica nanoparticles. The temperature-dependent dielectric permittivity at 1 kHz and 10 Hz can reveal the clear point temperature and the onset of the aggregation of silica nanoparticles in LC

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Olatunji, Oluwadamilola. "Transient liquid phase bonding of dissimilar single crystal superalloys." 2016. http://hdl.handle.net/1993/31943.

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Abstract:

Transient liquid phase (TLP) bonding has proven to be the preferred method for joining extremely difficult-to-weld advanced materials, including similar and dissimilar superalloys. In this work, an approach that combines experiments and theoretical simulations are used to investigate the effect of temperature gradient (TG) in a vacuum furnace on the temperature distribution in TLP bonded samples. When joining similar materials by this technique, the simulated results with experimental verifications show that, irrespective of where the samples are placed inside the vacuum furnace, a TG in the f

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