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Thursday, July 16, 2020 | History

4 edition of Defects in liquid crystals found in the catalog.

Defects in liquid crystals

Defects in liquid crystals

computer simulations, theory, and experiments

  • 140 Want to read
  • 40 Currently reading

Published by Kluwer Academic Publishers in Dordrecht, Boston .
Written in English

    Subjects:
  • Liquid crystals -- Defects -- Congresses

  • Edition Notes

    Statementedited by Oleg D. Lavrentovich ... [et al.].
    GenreCongresses.
    SeriesNATO science series -- v. 43.
    ContributionsLavrentovich, Oleg D., North Atlantic Treaty Organization. Scientific Affairs Division., NATO Advanced Study Research Workshop on Computer Simulations of Defects in Liquid Crystals Including their Relation to Theory and Experiment (2000 : Erice, Italy)
    Classifications
    LC ClassificationsQD923 .D43 2001, QD923 .D43 2001
    The Physical Object
    Paginationxv, 344 p. :
    Number of Pages344
    ID Numbers
    Open LibraryOL18169551M
    ISBN 10140200169X, 1402001703
    LC Control Number2001050548

      Part 3 begins with an exploration of quasi-, plastic, and liquid crystals. Next, we will learn how properties of materials are influenced and can be modified by structural defects. We will show that point defects are present in all crystals at finite temperatures and how their presence governs diffusion in . The book covers all phenomena observed in liquid crystal colloids with an emphasis on experimental tools and applications of topology in condensed matter, as well as practical micro-photonics applications. It includes a number of spectacular manifestations of new topological phenomena not found or difficult to observe in other systems.

    Topological defects in the orientational order that appear in thin slabs of a nematic liquid crystal, as seen in the standard schlieren texture, behave as a random quasi–two-dimensional system with strong optical birefringence. We present an approach to creating and controlling the defects using air pillars, trapped by micropatterned holes in the silicon substrate. Defects also affect the motion of colloids immersed in a liquid crystal and flow behaviour of a liquid crystal. Here we review recent developments in science and engineering of topological defects in nematic liquid crystals, mainly based on our numerical simulation studies.

    Book: Chemistry (Averill & Eldredge) forming a perfect crystal would require cooling the liquid phase infinitely slowly to allow all atoms, ions, or molecules to find their proper positions. Defects in Ionic and Molecular Crystals. All the defects and impurities described for metals are seen in ionic and molecular compounds as well. Defects in Liquid Crystals: Computer Simulations, Theory and Experiments, 27 O Kluwer Academic Publishers. Printed in the Netherlands. 1. Introduction Various condensed matter phases show layered structure with a one dimen- sional (ID) periodicity. .


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Defects in liquid crystals Download PDF EPUB FB2

Liquid crystals are fascinating materials which present a great variety of these mathematical objects and can therefore be considered as an extremely useful laboratory for topological defects. This book is the first attempt to present together complementary approaches to the investigations of topological defects in liquid crystals using theory.

In Alfred Saupe wrote the first of many seminal papers on the physics of liquid crystals. The best known of his results is the Maier-Saupe theory of liquid crystal phase formation. Ever since, he has been one of the towering figures in this field.

This book is 4/5(1). During his distinguished scientific career, Alfred Saupe made important contributions to liquid crystal research, laying the groundwork on which much of the current knowledge and research in the physics of liquid crystals is based.

This volume features papers presented by Prof. Saupe's colleagues, students and friends at a festschrift in honor of his 70th birthday. In addition, a selection of. By a defect we mean a point, curve or surface, in the neighbourhood of which the order parameter describing the orientation of the liquid crystal molecules varies very rapidly.

Defects can be observed optically, for example using polarized light, but it is dicult to obtain de nitive information about their small-scale structure via microscopy.

Defects in Liquid Crystals logarithmically with the linear size of the sample. However, the effect is no- ticeable only on scales of 1 km and more [I]; typical samples are thinner: e.g., liquid crystal displays use cells of thickness 10 prn or even less.

This review discusses static properties of topological defects, such as line defectsdisclinations and dislocations, point defects — hedgehogs (monopoles) and boojums; focal conic domains and tilt grain boundaries in basic types of liquid crystals: uniaxial and biaxial nematics, cholesterics and smectics.

The cells that were assembled in previous sections are usually used for research purposes. Studies of defects reveal the phases of liquid crystal. Textures, that is an appearance of the liquid crystal in the cell between crossed polarizers, change with temperature and indicate different phases and temperatures of the phase transitions.

Defects in liquid crystals Appearing under the polarizing microscope as ellipses, parabolas, hyperbolas, lines and points, colorful structural singularities are understood through topological and geometrical arguments. Topological defects in dispersed words and worlds around liquid crystals, or liquid crystal drops.

Liquid Crystals: Vol. 24, No. 1, pp. 5 hours ago  In this study, first, we numerically investigated the reflectivity of a cholesteric liquid crystal with an anisotropic defect layer inside. To model optical phenomena in the examined system, a 4 × 4 matrix method was employed.

The tests were carried out for different thicknesses of the whole system, different thicknesses of the defect layer, as well as different defect layer locations inside.

Unlike in cosmology and field theory, topological defects in condensed matter have been experimentally observed. Ferromagnetic materials have regions of magnetic alignment separated by domain walls. Nematic and bi-axial nematic liquid crystals display a variety of defects including monopoles, strings, textures etc.

Defects in Liquid Crystals the presence and migration of point defects (vacancies and interstitials). The analog in a smectic is a permeation [42~\ process by which matter is removed from a neighboring layer toward the vicinity of the dislocation (or vice versa).

This book is the first attempt to present together complementary approaches to the investigations of topological defects in liquid crystals using theory, experiments and computer simulations.

Dislocations break translational symmetries. Disclinations break rotational symmetries and are the basic defects of media with continuous symmetries, like liquid crystals.

Extensively revised and updated, this new edition of a classic text presents a unified approach to crystallography and to the defects found within crystals. The book combines the classical and exact description of symmetry of a perfect crystal with the possible geometries of the major defects-dislocations, stacking faults, point defects, twins.

Liquid crystals (LCs) provide an important arena for the controlled creation of topological defects by geometric frustration, and for the optical observation of these defects at the micron scale. Available in: gical defects are the subject of intensive studies in many different branches of physics ranging from cosmology to liquid Due to COVID, orders may be delayed.

Thank you for your : $ The Liquid Crystals Book Series publishes authoritative accounts of all aspects of the field, ranging from the basic fundamentals to the forefront of research, from the physics of liquid crystals to their chemical and biological properties, and from their self-assembling structures to their applications in series provides readers new to liquid crystals with a firm grounding in the.

Liquid crystal colloidal dispersions / H. Stark, A. Borstnik and S. Zumer Computer simulations and defects in confined liquid crystal lattice models / C. Chiccoli, P. Pasini and I. Feruli / [et al.] Molecular simulations and theory of planar interfaces and defects in nematic liquid crystals / M.

Allen. strength 1 defects, stuffed together. You'd be quite right: occasionally, This doesn't mean, though, that adding two defects always gives a bigger one. In nematic liquid crystals, two line defects are as good as none.

something it can't smooth out. Formally, the first homotopy group of the. This book is an outgrowth of the enormous advances made during the last three decades in both our understanding of liquid crystals and our ability to use them in applications. It presents a systematic, self-contained and up-to-date overview of the structure and properties of liquid crystals.

Defects and Textures in Liquid Crystals.Liquid crystals are partially ordered systems without a rigid, long-range structure.

The study of these materials covers a wide area: chemical structure, physical properties and technical applications. Due to their dual nature -- anisotropic physical properties of solids and rheological behavior of liquids -- and easy response to externally applied electric, magnetic, optical and surface 5/5(1).About this book.

This handbook is a unique compendium of knowledge on all aspects of the physics of liquid crystals. In over pages it provides detailed information on the physical properties of liquid crystals as well as the recent theories and results on phase transitions, defects and textures of different types of liquid crystals.