Nanostructures Of Bent-Shaped And Polar Liquid Crystals

Nanostructures Of Bent-Shaped And Polar Liquid Crystals

Author: Rony Saha

Publisher:

Published: 2022

Total Pages: 0

ISBN-13:

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The phases of matter between isotropic liquid and well-ordered crystalline solid phases are known as liquid crystal phases. The molecular architecture, which includes structure, polarity, and topology, influences the liquid crystal phases formed by mesomorphic materials. The most common and widely studied liquid crystal phase is the nematic phase formed by rod-like molecules. The molecules in this phase have only orientational order, which means they prefer to align along a single axis while their positions are random addition they do not have polarity. Flexible bent-shape molecules where an odd number of methylene groups connect two rigid arms exhibit twist-bend nematic (N_TB)" phase. In the N_TB phase, the molecules have a heliconical structure with a 10 nm range pich. Rigid achiral bent-shape materials typically show polar and chiral smectic structures because tilted and polar packing makes each smectic layer chiral. Lastly, rod-shaped molecules with large (about 10 Debye) dipole moments form the ferroelectric nematic phase predicted by Max Born in 1916 but experimentally observed only a few years ago. In my dissertation, I will describe various studies of the nanostructure of different flexibly bent-core liquid crystal materials exhibiting the N_TB Phase, structures of ferroelectric and antiferroelectric smectic phases of rigid bent-shape materials, and multiple ferroelectric nematic phases of a highly polar rod-shape substance.


Bent-Shaped Liquid Crystals

Bent-Shaped Liquid Crystals

Author: Hideo Takezoe

Publisher: CRC Press

Published: 2017-07-20

Total Pages: 290

ISBN-13: 1315355418

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Bent-Shaped Liquid Crystals: Structures and Physical Properties provides insight into the latest developments in the research on liquid crystals formed by bent-shaped mesogens. After a historical introduction, the expert authors discuss different kinds of mesophase structures formed by bent-shaped molecules. This book devotes the majority of its pages to physical properties such as polar switching, optics and non-linear optics, and behavior in restricted geometries. However, as chemistry is often highly relevant to the emergence of new phases, particularly with reflection symmetry breaking, it also involves a broad spectrum of interesting chemistry viewpoints.


Liquid Crystals

Liquid Crystals

Author: Tommaso Bellini

Publisher: Springer Science & Business Media

Published: 2012-01-21

Total Pages: 419

ISBN-13: 3642275907

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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


Nanoscience with Liquid Crystals

Nanoscience with Liquid Crystals

Author: Quan Li

Publisher: Springer Science & Business

Published: 2014-04-17

Total Pages: 431

ISBN-13: 3319048678

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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.


Bent-Shaped Liquid Crystals

Bent-Shaped Liquid Crystals

Author: Hideo Takezoe

Publisher: CRC Press

Published: 2017-07-20

Total Pages: 288

ISBN-13: 148224764X

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Bent-Shaped Liquid Crystals: Structures and Physical Properties provides insight into the latest developments in the research on liquid crystals formed by bent-shaped mesogens. After a historical introduction, the expert authors discuss different kinds of mesophase structures formed by bent-shaped molecules. This book devotes the majority of its pages to physical properties such as polar switching, optics and non-linear optics, and behavior in restricted geometries. However, as chemistry is often highly relevant to the emergence of new phases, particularly with reflection symmetry breaking, it also involves a broad spectrum of interesting chemistry viewpoints.


Nanomaterials in Liquid Crystals

Nanomaterials in Liquid Crystals

Author: Ingo Dierking

Publisher: MDPI

Published: 2018-09-25

Total Pages: 161

ISBN-13: 3038971154

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This book is a printed edition of the Special Issue "Nanomaterials in Liquid Crystals" that was published in Nanomaterials


Handbook of Liquid Crystals, 8 Volume Set

Handbook of Liquid Crystals, 8 Volume Set

Author: John W. Goodby

Publisher: John Wiley & Sons

Published: 2014-04-14

Total Pages: 5240

ISBN-13: 3527327738

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Much more than a slight revision, this second edition of the successful "Handbook of Liquid Crystals" is completely restructured and streamlined, with updated as well as completely new topics, 100% more content and a new team of editors and authors. As such, it fills the gap for a definitive, single source reference for all those working in the field of organized fluids and will set the standard for the next decade. The Handbook's new structure facilitates navigation and combines the presentation of the content by topic and by liquid-crystal type: A fundamentals volume sets the stage for an understanding of the liquid crystal state of matter, while individual volumes cover the main types and forms, with a final volume bringing together the diverse liquid crystal phases through their applications. This unrivaled, all-embracing coverage represents the undiluted knowledge on liquid crystals, making the Handbook a must-have wherever liquid crystals are investigated, produced or used, and in institutions where their science and technology is taught. Also available electronically on Wiley Online Library, www.wileyonlinelibrary.com/ref/holc Volume 1: Fundamentals of Liquid Crystals Volume 2: Physical Properties and Phase Behavior of Liquid Crystals Volume 3: Nematic and Chiral Nematic Liquid Crystals Volume 4: Smectic and Columnar Liquid Crystals Volume 5: Non-Conventional Liquid Crystals Volume 6: Nanostructured and Amphiphilic Liquid Crystals Volume 7: Supermolecular and Polymeric Liquid Crystals Volume 8: Applications of Liquid Crystals


Liquid Crystals With Nano And Microparticles (In 2 Volumes)

Liquid Crystals With Nano And Microparticles (In 2 Volumes)

Author: Jan P F Lagerwall

Publisher: World Scientific

Published: 2016-10-10

Total Pages: 944

ISBN-13: 9814619272

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'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.


Liquid Crystals with Nano/Micro Particles and Their Applications

Liquid Crystals with Nano/Micro Particles and Their Applications

Author: Jayeeta Chattopadhyay

Publisher: CRC Press

Published: 2023-03-31

Total Pages: 139

ISBN-13: 1000860310

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LCs are self-organized anisotropic fluids that are thermodynamically located between the isotropic liquid and the crystalline phase, exhibiting the fluidity of liquids as well as the long-range lattice order that can only be found in crystalline solids. The addition of nanomaterials to a LC material produces a composite or colloidal dispersion and results into a revolutionary change in their applications. This book will discuss the remarkable performances of nano-particle aided liquid crystals in metamaterials, photonics, functionalized polymer fibres, sensing, and medical diagnostics.


Nanostructures of Bent-core Liquid Crystals- Transmission Electron Microscopy, X-ray and Polarizing Microscopy Studies

Nanostructures of Bent-core Liquid Crystals- Transmission Electron Microscopy, X-ray and Polarizing Microscopy Studies

Author: Cuiyu Zhang

Publisher:

Published: 2015

Total Pages: 151

ISBN-13:

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Our goal is to characterize the nano-structures of various bent core liquid crystal phases by combining transmission electron microscopy with small angle X-ray scattering measurements. Much of this research was made possible by the recent acquisition of a state-of-the-art transmission electron microscope (TEM) equipped with cryogenic (cryo-TEM), low-dose imaging and freeze fracture sample preparation facility in the Liquid Crystal Institute, supported by the Ohio Research Scholars Program Research Cluster on Surfaces in Advanced Materials. The low-dose cryo-TEM is desired to observe beam-sensitive specimens at high resolution, which makes it possible to study thermotropic liquid crystal materials.