Download or read book Synthesis and Characterization of Novel Color tunable Cholesteric Liquid Crystals and Functional Materials written by 謝峰銘 and published by . This book was released on 2009 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis and Characterization of Novel Chiral Compounds and Their Applications in Cholesteric Liquid Crystal Devices written by 楊博智 and published by . This book was released on 2007 with total page 239 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Unconventional Liquid Crystals and Their Applications written by Wei Lee and published by Walter de Gruyter GmbH & Co KG. This book was released on 2021-07-19 with total page 581 pages. Available in PDF, EPUB and Kindle. Book excerpt: The work focuses on recent developments of the rapidly evolving field of Non-conventional Liquid Crystals. After a concise introduction it discusses the most promising research such as biosensing, elastomers, polymer films , photoresponsive properties and energy harvesting. Besides future applications it discusses as well potential frontiers in LC science and technology.
Download or read book Synthesis and Characterization of Photochemically Tunable Chiral Materials for Optically Addressed Cholesteric Displays written by Lisa M. Green and published by . This book was released on 2008 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: Liquid crystal displays are widely used in many electronic devices. To produce an image the displays are electronically addressed through complex electrode patterning. The electrode patterning is costly due to the development of drive chips and software and adds to the bulk of the display in order to house the control circuitry and power supply. In effort to reduce the cost of cholesteric displays, the development of a photocontrolled cholesteric state was undertaken. Such a state would eliminate the need for electronic control, enabling the display to be optically addressed by the addition of a photochemically tunable chiral dopant. This work focuses on the synthesis of 4-({2,2'-[(4-hydroxyphenyl) diazenyl]-1,1'-binaphthalenyl} diazenyl)phenol and modified derivatives for use as photochemically tunable chiral dopants in cholesteric displays. In detail, the synthesis, characterization and preliminary evaluation of the materials as dopants are reported. Some doped mixtures exhibit a tunable Bragg reflection of over 2,500 nm, while others have been optimized to only have tunable reflection within the visible spectrum. The details of a prototype display based on the properties of these materials are also included.
Download or read book Liquid Crystals written by Irina Carlescu and published by BoD – Books on Demand. This book was released on 2019-01-03 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: Liquid Crystals - Self-Organized Soft Functional Materials for Advanced Applications is focused on both theoretical models and experimental results, pointing out the chemical and physical properties (thermodynamics, electro-optic switching behavior, and non-linear optic phenomena) of liquid crystals used in a wide range of devices. In this respect, the chapters cover the following topics: chemical structure and phase transitions in bent-core liquid crystals, phase and structural behavior of liquid crystals used to align carbon nanotubes, molecular alignment, and photorefractive effect in the ferroelectric phase, which has the potential to be used as transistors, for image storage, and in optical signal processing. It is expected that the book will be of interest to researchers in academia and industries, as well as advanced students.
Download or read book Synthesis and Characterization of Novel Glassy Liquid Crystals written by Huang-Ming Philip Chen and published by . This book was released on 2003 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook of Liquid Crystals Fundamentals written by Dietrich Demus and published by Wiley-VCH. This book was released on 1998-03-24 with total page 960 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Handbook of Liquid Crystals is a unique compendium of knowledge on all aspects of liquid crystals. In over 2000 pages the Handbook provides detailed information on the basic principles of both low- and high-molecular weight materials, as well as the synthesis, characterization, modification, and applications (such as in computer displays or as structural materials) of all types of liquid crystals. The five editors of the Handbook are internationally renowned experts from both industry and academia and have drawn together over 70 leading figures in the field as authors. The four volumes of the Handbook are designed both to be used together or as stand-alone reference sources. Some users will require the whole set, others will be best served with a selection of the volumes. Volume 1 deals with the basic physical and chemical principles of liquid crystals, including structure-property relationships, nomenclature, phase behavior, characterization methods, and general synthesis and application strategies. As such this volume provides an excellent introduction to the field and a powerful learning and teaching tool for graduate students and above. Volume 2 concentrates on low-molecular weight materials, for example those typically used in display technology. A high quality survey of the literature is provided along with full details of molecular design strategies, phase characterization and control, and applications development. This volume is therefore by far the most detailed reference source on these industrially very important materials, ideally suited for professionals in the field. Volume 3 concentrates on high-molecular weight, or polymeric, liquid crystals, some of which are found in structural applications and others occur as natural products of living systems. A high-quality literature survey is complemented by full detail of the synthesis, processing, analysis, and applications of all important materials classes. This volume is the most comprehensive reference source on these materials, and is therefore ideally suited for professionals in the field.
Download or read book Structural Colors Based on Tunable Cholesteric Liquid Crystal Polymers written by 陳正捷 and published by . This book was released on 2020 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electrically tunable Colors of Chiral Liquid Crystals for Photonic and Display Applications written by Shin-Ying Lu and published by . This book was released on 2010 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electrically tunable colors with chiral liquid crystal materials have been discussed in this thesis. The switchable color device can be used as a color filter and may be an important step toward eco-friendly color reflective displays. The first approach in achieving electrically tunable color is a polymer-stabilized cholesteric liquid crystal. The selected Bragg reflective wavelength can be electrically switched to reflect blue or green from a cell initially reflecting a red color. The color change is a result of the compression of the helical pitches in planar layers in response to the applied voltage. The unique feature of the polymer stabilization is in the fact that the electrically switched colors preserve good reflectance and the colors are reversible with voltage ramping. The polymer-stabilized cholesteric display exhibits anisotropic reflection and has a reflected color which is independent of temperature. A second method is a polymer-stabilized blue phase liquid crystal, in which the Bragg reflected color of the blue phase can be switched to reflect a second color through the electrostriction effect. The phase-separated three-dimensional polymer network transcribes the cubic structure of a BP liquid crystal and restrains the deformation from cubic lattice by the external electric field.
Download or read book Chemistry of Discotic Liquid Crystals written by Sandeep Kumar and published by CRC Press. This book was released on 2010-12-20 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The self-contained properties of discotic liquid crystals (DLCs) render them powerful functional materials for many semiconducting device applications and models for energy and charge migration in self-organized dynamic functional soft materials. The past three decades have seen tremendous interest in this area, fueled primarily by the possibility of creating a new generation of organic semiconductors and wide viewing displays using DLCs. While a number of books on classical calamitic liquid crystals are available, there are, as yet, no books that are dedicated exclusively to the basic design principles, synthesis, and physical properties of DLCs. The first reference book to cover DLCs, Chemistry of Discotic Liquid Crystals: From Monomers to Polymers highlights the chemistry and thermal behavior of DLCs. Divided into six chapters, each with a general description, background, and context for the concepts involved, the book begins with a basic introduction to liquid crystals, describing molecular self-assembly and various types of liquid crystals. It outlines their classification, covers their history and general applications, and focuses on DLCs and their discovery, structure, characterization, and alignment. The book goes on to examine the chemistry and physical properties of various monomeric DLCs, including 25 sections describing the synthesis and mesomorphic properties of monomeric DLCs formed by different cores. The bulk of the book covers the chemistry and mesomorphism of discotic dimers, oligomers, and polymers and concludes with a look at some applicable properties of DLCs. A comprehensive and up-to-date resource, this book is designed to be accessible and of value not just for students and researchers but also to the directors and principal investigators working in this field, providing the foundation and fuel to advance this fast-growing technological field.
Download or read book Design And Synthesis Of Novel Organic Materials For Liquid Crystal Applications written by Pawan Nepal and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Liquid crystals (LCs) show unique optical and physical properties, and so these compounds are attractive for many applications, including displays, sensors, reconfigurable mirrors, photonic devices, etc. [1-5]. Due to the cost and performance limitations of devices based on existing LC materials, it is essential to develop novel systems that are cost-effective and with enhanced performance. Also, it is crucial to explore the properties of these soft matter materials with respect to the molecular modifications to better understand their broad applicability. This is especially the case if the phase types involved are recently discovered. Many chiral dopants required for cholesteric preparations are either obtained from conventional chemical synthesis or from plant extracts. So, in search for novel dopants which are of biological origin and are relatively cheaper to produce in large volume, a study has been carried out to develop chiral compounds made from the fermentation derived bio-precursors. Likewise, the recently discovered nematic ferroelectric (NF) LCs [6] have not yet gained practical utility though they have potential to be applied in next generation displays and optoelectronic devices. Although these NF LCs show response towards ultra-small driving voltage ~1V/cm [7], the realistic applications are limited due to their current shortcomings such as monotropic LC phase, high temperature phase transition, thermochemical instability, etc. Thus, to develop novel improved systems and to seek their pragmatic applications, a variety of unique NF LCs have been synthesized and studied. Similarly, to explore the synthetic challenges and the properties related to their structural features, several classic compounds such as cyanobiphenyls (CBs), CB dimers, and triphenylene discotics have been prepared and examined. Reference: [1]Geelhaar, T. Liquid Crystals for Display Applications. Liq. Cryst. 1998, 24 (1), 91-98. https://doi.org/10.1080/026782998207613. [2] White, T. J.; Freer, A. S.; Tabiryan, N. V.; Bunning, T. J. Photoinduced Broadening of Cholesteric Liquid Crystal Reflectors. J. Appl. Phys. 2010, 107 (7). https://doi.org/10.1063/1.3369437. [3] Sergeyev, S.; Pisula, W.; Geerts, Y. H. Discotic Liquid Crystals: A New Generation of Organic Semiconductors. Chem. Soc. Rev. 2007, 36 (12), 1902-1929. https://doi.org/10.1039/b417320c. [4] Kumar, M.; Kumar, S. Liquid Crystals in Photovoltaics : A New Generation of Organic Photovoltaics. 2017, No. July 2016, 85-111. https://doi.org/10.1038/pj.2016.109. [5] Beeckman, J. Liquid-Crystal Photonic Applications. Opt. Eng. 2011, 50 (8), 081202. https://doi.org/10.1117/1.3565046. [6] Chen, X.; Chen, X.; Korblova, E.; Korblova, E.; Dong, D.; Dong, D.; Wei, X.; Wei, X.; Shao, R.; Shao, R.; et al. First-Principles Experimental Demonstration of Ferroelectricity in a Thermotropic Nematic Liquid Crystal: Polar Domains and Striking Electro-Optics. Proc. Natl. Acad. Sci. U. S. A. 2020, 117 (25), 14021-14031. https://doi.org/10.1073/pnas.2002290117. [7] Nishikawa, H.; Shiroshita, K.; Higuchi, H.; Okumura, Y.; Haseba, Y.; Yamamoto, S. I.; Sago, K.; Kikuchi, H. A Fluid Liquid-Crystal Material with Highly Polar Order. Adv. Mater. 2017, 29 (43), 1-8. https://doi.org/10.1002/adma.201702354.
Download or read book Fabrication and Characterization of Cholesteric Liquid Crystal Devices Promoted by Polydopamine Particles written by and published by . This book was released on 2021 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nematic and Cholesteric Liquid Crystals written by Patrick Oswald and published by CRC Press. This book was released on 2005-02-28 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt: Liquid crystals allow us to perform experiments that provide insight into fundamental problems of modern physics, such as phase transitions, frustration, elasticity, hydrodynamics, defects, growth phenomena, and optics (linear and non linear). This excellent volume meets the need for an up-to-date text on liquid crystals.Nematic and Cholesteric Liq
Download or read book Nanoscience with Liquid Crystals written by Quan Li and published by Springer Science & Business. This book was released on 2014-04-17 with total page 431 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on the exciting topic of nanoscience with liquid crystals: from self-organized nanostructures to applications. The elegant self-organized liquid crystalline nanostructures, the synergetic characteristics of liquid crystals and nanoparticles, liquid crystalline nanomaterials, synthesis of nanomaterials using liquid crystals as templates, nanoconfinement and nanoparticles of liquid crystals are covered and discussed, and the prospect of fabricating functional materials is highlighted. Contributions, collecting the scattered literature of the field from leading and active players, are compiled to make the book a reference book. Readers will find the book useful and of benefit both as summaries for works in this field and as tutorials and explanations of concepts for those just entering the field. Additionally, the book helps to stimulate future developments.
Download or read book Transparent Conductive Materials written by David Levy and published by John Wiley & Sons. This book was released on 2019-04-29 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt: Edited by well-known pioneers in the field, this handbook and ready reference provides a comprehensive overview of transparent conductive materials with a strong application focus. Following an introduction to the materials and recent developments, subsequent chapters discuss the synthesis and characterization as well as the deposition techniques that are commonly used for energy harvesting and light emitting applications. Finally, the book concludes with a look at future technological advances. All-encompassing and up-to-date, this interdisciplinary text runs the gamut from chemistry and materials science to engineering, from academia to industry, and from fundamental challenges to readily available applications.
Download or read book Axially Chiral Compounds written by Bin Tan and published by John Wiley & Sons. This book was released on 2021-11-22 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt: Axially Chiral Compounds Explore this comprehensive and current volume summarizing the characteristics, synthesis, and applications of axial chirality Appearing widely in natural products, biologically active molecules, asymmetric chemistry, and material science, axially chiral motifs constitute the core backbones of the majority of chiral ligands and organocatalysts in asymmetric catalysis. In a new work of particular relevance to synthetic chemists, Axially Chiral Compounds: Asymmetric Synthesis and Applications delivers a clearly structured and authoritative volume covering the classification, characteristics, synthesis, and applications of axial chirality. A must read for every synthetic chemist practicing today, the book follows the development history, research status, and applications of axial chirality. An introductory chapter familiarizes the reader with foundational material before the distinguished authors describe the different classes and the synthesis of axial chiral compounds used in asymmetric synthesis. The book concludes with a focus on the applications of chiral ligands, chiral catalysts, and materials. Readers will also benefit from the inclusion of: A thorough introduction to asymmetric synthesis, including biaryls atropisomers, heterobiaryls atropisomers, and non-biaryls atropisomers Explorations of chiral allene, spiro skeletons, and natural products Practical discussions of asymmetric transformation, chiral ligands, and chiral catalysts An examination of miscellaneous applications of axially chiral compounds Perfect for organic chemists, chemists working with or on organometallics, catalytic chemists, and materials scientists, Axially Chiral Compounds: Asymmetric Synthesis and Applications will also earn a place in the libraries of natural products chemists who seek a one-stop reference for compounds exhibiting axial chirality.
