Download or read book Discotic Liquid Crystals Through Molecular Self assembly written by Changqing Yang and published by . This book was released on 1995 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemistry of Discotic Liquid Crystals written by Sandeep Kumar and published by CRC Press. This book was released on 2016-04-19 with total page 512 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
Download or read book Physics And Chemistry Of Molecular Assemblies written by Kazuchika Ohta and published by World Scientific. This book was released on 2020-03-17 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: The JLCS Excellent Book Award 2021 by Japanese Liquid Crystal SocietyIn nature, a number of molecules self-assemble to form various aggregation states. In these aggregation states, numerous functions, which have never been observed in one molecule, are developed. Even for the same compound, the different aggregation states exhibit totally different physical properties in density, hardness, optical and electrical properties, medicinal effect, etc. For pursuing the functionality of materials, it may be indispensable to understand the molecular aggregation states of crystals, liquid crystals, glass, colloids, etc. In this book, the author will focus on the basis of polymorphic phenomena of crystals and liquid crystals and their physical properties. After reading this book, you will be able to change your viewpoint of matter from traditional limited 'three states of matter' to novel 'numerous states of matter.'
Download or read book Hydrogen Bonding Discotic Liquid Crystals written by Mark Bushey and published by . This book was released on 2005 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Liquid Crystals written by Tommaso Bellini and published by Springer Science & Business Media. This book was released on 2012-01-21 with total page 419 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fluorinated Liquid Crystals: Design of Soft Nanostructures and Increased Complexity of Self-Assembly by Perfluorinated Segments, by Carsten Tschierske Liquid Crystalline Crown Ethers, by Martin Kaller and Sabine Laschat Star-Shaped Mesogens – Hekates: The Most Basic Star Structure with Three Branches, by Matthias Lehmann DNA-Based Soft Phases, by Tommaso Bellini, Roberto Cerbino and Giuliano Zanchetta Polar and Apolar Columnar Phases Made of Bent-Core Mesogens, by N. Vaupotič, D. Pociecha and E. Gorecka Spontaneous Achiral Symmetry Breaking in Liquid Crystalline Phases, by H. Takezoe Nanoparticles in Liquid Crystals and Liquid Crystalline Nanoparticles, by Oana Stamatoiu, Javad Mirzaei, Xiang Feng and Torsten Hegmann Stimuli-Responsive Photoluminescent Liquid Crystals, by Shogo Yamane, Kana Tanabe, Yoshimitsu Sagara and Takashi Kato
Download or read book Molecular Architectonics and Nanoarchitectonics written by Thimmaiah Govindaraju and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the ultimate assembly of recent research activities on molecular architectonics and nanoarchitectonics by authors who are worldwide experts. The book proposes new ways of creating functional materials at the nano level using the concepts of molecular architectonics and nanoarchitectonics, which are expected to be the next-generation approaches beyond conventional nanotechnology. All the contents are categorized by types of materials, organic materials, biomaterials, and nanomaterials. For that reason, non-specialists including graduate and undergraduate students can start reading the book from any points they would like. Cutting-edge trends in nanotechnology and material sciences are easily visible in the contents of the book, which is highly useful for both students and experimental materials scientists. .
Download or read book Self assembly of Confined Liquid Crystals written by Kathrin Sentker and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Liquid crystals in combination with nanoporous media, exhibiting structures significantly smaller than the wavelengths of visible light, are promising candidates to design new soft-hard photonic metamaterials. The liquid crystal provides functionality, resulting from temperature tunable anisotropic properties, i.\,e. optical birefringence, while the nanoporous solid provides a mechanical robust scaffold structure. Then the optical functionality of prospective metamaterials is not determined by the properties of base materials, but from newly designed multiscale structures often absent in the base materials. However, the extreme spatial and topological constraints can result in inhomogeneous molecular arrangements or even the complete suppression of liquid crystallinity in nanoconfinement hampering the optical functionality. Depending on the type of confining space (meso- and macroporous silica and anodized aluminium oxide) and as a function of temperature, pore size and pore surface chemistry, the molecular self-assembling process and the resulting metamaterial potential of a discotic liquid crystal (HAT6) in nanoconfinement is analyzed. In order to correlate orientational and translational ordering, synchrotron-based 2D X-ray diffraction in combination with high-resolution optical polarimetry measurements are performed. Resulting from a quantized phase transition a rarely measured material specific parameter giving a measure of the tendency of the liquid crystal to bend along the preferred alignment direction is found. Additionally, the experiments and complementary Monte Carlo simulations show a remarkably rich self-assembly behavior resulting in structures absent in the bulk state. These diverse configurations on the nanoscale result in integrated material systems exhibiting a temperature- and liquid-solid interaction-dependent positive and negative optical birefringence. Hence, the self-organized nanoporous solids in combination with liquid-crystalline self-assembly allow the fabrication of newly designed photonic metamaterials with tailorable optical anisotropy.
Download or read book Supramolecular Self assembly of Discotic Liquid Crystalline Supermolecules written by Jianjun Miao and published by . This book was released on 2009 with total page 510 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Molecular Self assembly in Liquid Crystal Topological Defects written by Robert X. Gottlieb and published by . This book was released on 2017 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Conformational Dynamics and Self assembly of Discotic Dimers written by Carson Zellman and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Disc-shaped (discotic) liquid crystals (DLCs) predominantly form columnar phases, which have been utilized as organic semiconductors in opto-electronic devices; yet these materials have been hampered by their thermal stability, often exhibiting liquid crystallinity at high and narrow temperature ranges. Discotic dimers, where two discotic moieties are tethered, overcome this hinderance through their unique ability to supercool and retain liquid crystallinity at device operating temperatures; however, the flexible linker that helps promote supercooling also makes dimers difficult to study - the dimer can adopt multiple conformations in equilibrium, including folded and extended structures. The effect these conformational dynamics have on the liquid crystal (LC) properties is still poorly understood. A series of dibenzo[a,c]phenazine diesters with subtle changes to the linking group were prepared and their conformational dynamics and self-assembly were probed. We observed a strong sensitivity between linker stereochemistry and supramolecular self-assembly. For a pair of 2,3-butyl dimers, the meso isomer, which extends more than its diastereomer, formed a substantially more thermally stable and ordered columnar phase. The different properties arose from differences in their conformational equilibria, as self-assembly from extended shapes was shown to stabilize and increase the order of the columnar hexagonal phase. In addition to the conformational equilibrium, the geometries had a significant impact on the supramolecular self-assembly. For a pair of 1,2-cyclohexyl diastereomers, one isomer was liquid crystalline, and the other was amorphous. The disparate phase behaviour stemmed from their unfolded shapes, as the mesogenic isomer formed an extended and fairly planar structure while the amorphous isomer could only adopt non-planar unfolded geometries. We also investigated the effect adjacent groups have on the conformational dynamics and self-assembly, as the majority of discotic dimers contain an ether group ortho to the linker. In discotic monomers, adjacent ether groups broadened and lowered the columnar thermal range through depression of the melting temperature and elevation of the clearing temperature. In dimers, the additional ether group deterred folding. While we anticipated this would enhance the columnar thermal stability, the opposite was observed. We discovered the adjacent ether group destabilizes the columnar phase from extended geometries. The ether group likely perturbs planarity in the columnar hexagonal array to some extent, highlighting again the importance of planarity for columnar self-assembly from extended shapes. Finally, the lessons learned from discotic dimer self-assembly was utilized to design discotic nematic materials. To promote the rarely observed phase, discotic dimers with a short direct ester bridge and an adjacent ether group were synthesized. The key was the non-planar, extended geometry, which allowed promotion of nematic ordering over columnar hexagonal assembly.
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 Self Assembled Supramolecular Architectures written by Nissim Garti and published by John Wiley & Sons. This book was released on 2012-08-15 with total page 503 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book will describe fundamentals and recent developments in the area of Self-Assembled Supramolecular Architecture and their relevance to the understanding of the functionality of membranes as delivery systems for active ingredients. As the heirarchial architectures determine their performance capabilities, attention will be paid to theoretical and design aspects related to the construction of lyotropic liquid crystals: mesophases such as lamellar, hexagonal, cubic, sponge phase micellosomes. The book will bring to the reader mechanistic aspects, compositional considerations, transition within phases, solubilization capacities, drug entrapment and release mechanisms and transmembrane, transdermal, and other transport phenomena. It will stress the importance of these mesostructures to crystallization and polymorphism of drugs, fats, and nutraceuticals and will discuss regioselectivity of organic and enzymatic reactions that take place at interfaces and within the channels of the mesophase. The book will bring studies on the use of these mesophase as crystallization or particulation media for the formation of nanoparticles and nanocrystals. Chapters will discuss applications in the areas of pharmaceuticals, food, cosmetics, plastics, paper, agro-chemistry and industrial applications.
Download or read book Liquid Crystals With Nano And Microparticles In 2 Volumes written by Jan P F Lagerwall and published by World Scientific. This book was released on 2016-10-10 with total page 944 pages. Available in PDF, EPUB and Kindle. Book excerpt: 'The overall book content is excellently coordinated to form a synchronised story, interesting to a broad scientific audience … The book summarises the present knowledge in the field, introduces fundamental concepts to the beginners, describes key measuring methods and presents several different typical demonstrative systems, some of them exhibiting an extraordinary rich spectrum of structures and superstructures. I am sure that with time the book will become an attractor to a broad audience (physicists, chemists, material scientists, engineers, etc.), ranging from students, beginners in the field to experienced researchers. To summarise, this is the book that I have been missing on my bookshelf.'Liquid Crystals TodayWhile liquid crystals are today widely known for their successful application in flat panel displays (LCDs), academic liquid crystal research is more and more targeting situations where these anisotropic fluids are put to completely different use, in varying contexts. A particularly strong focus is on colloidal liquid crystals, where particles, bubbles or drops are dispersed in a liquid crystal phase. The liquid crystal can act as a host phase, with the inclusions constituting foreign guests that disturb the local order in interesting ways, often resulting in large-scale positional arrangement and/or uniform alignment of the guests. But it may also be formed by solid particles themselves, if these are of nanoscale dimensions and of disc- or rod-shape, and if they are suspended in an isotropic liquid host at sufficient concentration.This book aims to cover both the modern research tracks, gathering pioneering researchers of the different subfields to give a concise overview of the basis as well as the prospects of their respective specialties. The scope spans from curiosity-driven fundamental scientific research to applied sciences. Over the course of the next decade, the former is likely to generate new tracks of the latter type, considering the exploratory and productive phase of this young research field.
Download or read book Nanostructured Polymer Blends written by Goddeti Siva Mohan Reddy and published by Elsevier Inc. Chapters. This book was released on 2013-11-28 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt: Liquid crystals constitute a fascinating class of soft condensed matter characterized by the counterintuitive combination of fluidity and long-range order. Today liquid crystals are best known for their exceptionally successful application in flat panel displays, but they actually exhibit a plethora of unique and attractive properties that offer tremendous potential for fundamental science as well as innovative applications well beyond the realm of displays. This full breadth of the liquid crystalline state of matter is becoming increasingly recognized and numerous new and exciting lines of research are being opened up. In this chapter we look at these exciting developments, focusing primarily on the physics aspects of the new research thrusts, in which thermotropic as well as lyotropic liquid crystals often meet other types of soft matter, such as polymers and colloidal nano- or microparticle dispersions. Because the field is also of interest for researchers who may not have a liquid crystal background we begin with a concise introduction to the liquid crystalline state of matter and the key concepts of the research field. We then discuss nanostructured liquid crystals, followed by applications of nanostructured liquid crystals.
Download or read book Liquid Crystalline Polymers written by Lei Zhu and published by Springer. This book was released on 2020-08-14 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive overview of various self-assemblies in liquid crystalline polymers and their electrical, optical, mechanical, and flame retardant properties. Liquid crystalline polymers are unique self-assembled, functional soft materials with electrical, magnetic, and thermal responses which find potential applications in numerous areas. As well as providing an overview of their synthesis, self-assembly and dynamics the various applications are also discussed. Such applications as liquid crystalline elastomers, light responsive actuators, optical reflectors, gas barrier films, and even flame retardant polymers will be presented. The book is a useful resource for undergraduates, postgraduates and experienced researchers.
Download or read book Molecular Self Assembly written by Makoto Fujita and published by Springer. This book was released on 2003-09-04 with total page 255 pages. Available in PDF, EPUB and Kindle. Book excerpt: Self-assembly is undoubtedly a topic of special interest in current chemistry and is related to very wide scientific areas. Recent progress in this field seems to be featured by the construction of well-defined discrete systems exploiting complementary hydrogen bonding as well as coordination bonding. Seven leading international experts introduce the current topics in this very interesting field, focusing on two major subjects: organic assemblies and inorganic assemblies. All researchers who are interested in molecular recognition, material science, nanotechnology, and supramolecular chemistry will welcome this book as an inspiring source for creative research ideas.
