Download or read book Self assembled Anisotropic Colloid Systems for Photonic Applications written by Angela Carrier Stelson and published by . This book was released on 2017 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: Photonic crystals are optical structures periodic on the length scale of light, and support useful attributes including photonic bandgaps (ranges of frequencies forbidden from propagating in the material), negative refraction and slow light effects (extremely low group velocity). Such effects have applications in sensors, waveguides, solid-state lighting, photovoltaics and superlenses, among others. The optical characteristics of a photonic crystal are determined by the interplay of structure, order and materials properties in the crystal. Self-assembled anisotropic colloids are attractive templates for photonic crystals due to their cost effectiveness and diversity of structures and symmetries. Introducing entropic and enthalpic effects to engineer inter-particle interactions increases the variety of phases and mesophases in anisotropic colloidal assemblies. In this dissertation, the photonic properties of self-assembly inspired structures are investigated via electromagnetic simulations. New paradigms for self-assembled photonic crystals are developed, and desirable properties such as photonic bandgaps, negative refraction, and slow light are correlated with structural and materials parameters informed by colloidal assemblies. Specifically, the photonic crystal properties of partial order rotator crystals, Archimedean tilings, and quasi-two dimensional 'slab' crystalline structures are investigated. All three systems display large photonic bandgaps. Slow light effects are observed in the rotator crystal and Archimedean tilings. As well, negative refractive index is predicted in the 'slab' crystal and the Archimedean tiling. These projects open new frontiers for research to manipulate self-assembled systems for photonics. Additionally, the assembly of colloidal C60 platelets is investigated under two-dimensional confinement and electric field. The C60 platelets are synthesized via a co-solvent precipitation method. The particles assemble under dipolar forces, dielectrophoretic forces, and electrohydrodynamic flows. Frequency-dependent phase transitions occur at the critical Maxwell-Wagner crossover frequency, where the effective polarizability of the particles in the medium is substantially reduced. Structures form as a function of field strength, frequency and confinement including hexagonal, oblique, string fluid, coexistent hexagonal-rhombic, and tetratic.

Download or read book Functional Materials from Colloidal Self assembly written by George Zhao and published by John Wiley & Sons. This book was released on 2022-01-19 with total page 678 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive resource for new and veteran researchers in the field of self-assembling and functional materials In Functional Materials from Colloidal Self-assembly, a pair of distinguished researchers delivers a thorough overview of how the colloidal self-assembly approach can enable the design and fabrication of several functional materials and devices. Among other topics, the book explores the foundations of self-assembly in different systems, nucleation, the growth of nanoparticles, self-assembly of colloidal microspheres for photonic crystals and devices, and the self-assembly of amphiphilic molecules as a template for mesoporous materials. The authors also discuss the self-assembly of biomolecules, superstructures from self-assembly, architectures from self-assembly, and the applications of self-assembled nanostructures. Functional Materials from Colloidal Self-assembly provides a balanced approach to the theoretical background and applications of the subject, offering sound guidance to both experienced and early-career researchers. The book also delivers: A thorough introduction to the fundamentals of colloids, including the theory of nucleation and the growth of colloidal particles Comprehensive explorations of mechanisms and strategies for the self-assembly of colloidal particles, including DNA-mediated colloidal self-assembly Practical discussions of characterization techniques for self-assembled colloidal structures, including electron microscopy techniques and X-ray techniques In-depth examinations of biological and biomedical materials, including tissue engineering, drug loading and release, and biodetection Perfect for materials scientists, inorganic chemists, and catalytic chemists, Functional Materials from Colloidal Self-assembly is also a must-read reference for biochemists and surface chemists seeking a one-stop resource on self-assembling and functional materials.

Download or read book Colloidal Self Assembly written by Junpei Yamanaka and published by Springer Nature. This book was released on 2023-11-04 with total page 237 pages. Available in PDF, EPUB and Kindle. Book excerpt: This concise book covers fundamental principles of colloidal self-assembly and overviews of basic and applied research in this field, with abundant illustrations and photographs. Experimental and computer simulation methods to study the colloidal self-assembly are demonstrated. Complementary videos "Visual Guide to Study Colloidal Self-Assembly" on the research procedures and assembly processes are available via SpringerLink to support learning. The book explains basic elements of mechanics and electromagnetism required to study the colloidal self-assembly, so that graduate students of chemistry and engineering courses can learn the contents on their own. It reviews important research topics, including the authors' works on the colloidal self-assembly of more than 30 years’ work. The principal topics include: (1) crystallization of colloidal dispersions, with the emphasis on the role of surface charges, (2) fabrication of large and high-quality colloidal crystals by applying controlled growth methods, (3) association and crystallization by depletion attraction in the presence of polymers, (4) clustering of colloidal particles, especially those in oppositely charged systems, and (5) two-dimensional colloidal crystals. Furthermore, it covers (6) applications of colloidal crystals, ranging from cosmetics to sensing materials. We also describe space experiments on colloidal self-assembly in the International Space Station. This book will interest graduate school students in colloid and polymer science, pharmaceutics, soft matter physics, material sciences, and chemical engineering courses. It will also be a useful guide for individuals in academia and industry undertaking research in this field.

Download or read book Anisotropic Particle Assemblies written by Ning Wu and published by Elsevier. This book was released on 2018-07-12 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: Anisotropic Particle Assemblies: Synthesis, Assembly, Modeling, and Applications covers the synthesis, assembly, modeling, and applications of various types of anisotropic particles. Topics such as chemical synthesis and scalable fabrication of colloidal molecules, molecular mimetic self-assembly, directed assembly under external fields, theoretical and numerical multi-scale modeling, anisotropic materials with novel interfacial properties, and the applications of these topics in renewable energy, intelligent micro-machines, and biomedical fields are discussed in depth. Contributors to this book are internationally known experts who have been actively studying each of these subfields for many years.This book is an invaluable reference for researchers and chemical engineers who are working at the intersection of physics, chemistry, chemical engineering, and materials science and engineering. It educates students, trains the next generation of researchers, and stimulates continuous development in this rapidly emerging area for new materials and innovative technologies. - Provides comprehensive coverage on new developments in anisotropic particles - Features chapters written by emerging and leading experts in each of the subfields - Contains information that will appeal to a broad spectrum of professionals, including but not limited to chemical engineers, chemists, physicists, and materials scientists and engineers - Serves as both a reference book for researchers and a textbook for graduate students

Download or read book Photonic Slabs with Anisotropic Colloid and Colloid Inspired Bases written by Erin Kathleen Riley and published by . This book was released on 2014 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: The concept of photonic crystals as 'semiconductors for light' has given rise to strategies for the design and fabrication of periodic dielectric materials with dramatic effects on photon dispersion relations. Photonic crystal theory has revealed numerous reduced symmetry and/or complex basis champion structures that enhance light-matter interactions and promote photonic band gap properties. Realizations of such structures at visible and near infrared wavelengths are often challenging and may be achieved a decade or more after they are envisioned. Colloidal self-assembly routes, in particular, have been desired for visible light control, low cost, ability to span from two- to three- dimensions and potentially large area, parallel processing. Thermodynamic simulation literature in the context of supramolecular chemistry studies indicates non-spherical building blocks hold promise for incorporating a rich diversity of packing arrangements inaccessible with commonly available spherical bases. Investigations in the synthesis and processing science foundations for obtaining order (i.e., mesophases and crystals) along with the optical characterization consistent with the thin film forms are essential to understanding structure-property correlations for photonic solids from colloids. This dissertation demonstrates the application of physical confinement to direct selfassembly. In addition, the photonic band gap characterization of two-dimensional (2D) and quasi-2D structures from mushroom cap and asymmetric dimer shaped colloids was performed using photonic crystal 'slab' configurations. Aqueous suspensions of micronsized mushroom cap-shaped particles were self-organized by gravitational sedimentation in a wedge-shaped confinement cell. The sequence of phases with increased cell height was studied with precise spatial and temporal resolution via fast confocal microscopy. In addition to the phase symmetry transitions found for spheres, rotator (i.e., plastic crystal) and orientation-dependent states were determined. The photonic band gap forming properties of the buckled phase observed in the mushroom-cap particle system under confinement were theoretically modeled. The 2D finite height photonic crystals with dielectric shaping in three dimensions imparted variation to the cross-sectional profile of the slab. The configuration is atypical for lithographic realizations of photonic slabs and also for 2D photonic crystal models assumed to extend infinitely with fixed cross-section along the z-axis. The experimentally tunable variables of shape and degree of buckling were captured using structural parameters. Complete band gaps in the guided modes were determined as a function of shape parameters, lattice distortion, filling fraction, refractive index contrast between low and high dielectric regions, etc. Slab structures were also modeled based on dimers (i.e., two adjacent or overlapping spheres) in centeredrectangular lattices previously realized through convective (i.e., evaporation-assisted) or confinement self-assembly. The degree of lobe fusion and the degree of lobe symmetry shape parameters accessible experimentally were mapped in addition to the structural and materials parameters. Large band gaps for each light polarization as well as polarization independent band gaps were found in a wide range of structures. Additionally, dimer cylinder bases on centered rectangular lattices were modeled to compare properties of realizations consistent with microfabrication using lithography and with colloidal processing for self-assembly of photonic templates. The study suggests that the ideation for structural design in slabs can be enriched by the combination of thermodynamicallyinspired structures with the ease of optimizing slab height (i.e., through lithographic fabrication).

Download or read book Materials Nanoarchitectonics written by Katsuhiko Ariga and published by Elsevier. This book was released on 2023-12-07 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt: Materials Nanoarchitectonics: From Integrated Molecular Systems to Advanced Devices provides the latest information on the design and molecular manipulation of self-organized hierarchically structured systems using tailor-made nanoscale materials as structural and functional units. The book is organized into three main sections that focus on molecular design of building blocks and hybrid materials, formation of nanostructures, and applications and devices. Bringing together emerging materials, synthetic aspects, nanostructure strategies, and applications, the book aims to support further progress, by offering different perspectives and a strong interdisciplinary approach to this rapidly growing area of innovation. This is an extremely valuable resource for researchers, advanced students, and scientists in industry, with an interest in nanoarchitectonics, nanostructures, and nanomaterials, or across the areas of nanotechnology, chemistry, surface science, polymer science, electrical engineering, physics, chemical engineering, and materials science. - Offers a nanoarchitectonic perspective on emerging fields, such as metal-organic frameworks, porous polymer materials, or biomimetic nanostructures - Discusses different approaches to utilizing "soft chemistry" as a source for hierarchically organized materials - Offers an interdisciplinary approach to the design and construction of integrated chemical nano systems - Discusses novel approaches towards the creation of complex multiscale architectures

Download or read book Programming Hierarchical Self assembly of Anisotropic Colloids written by Daniel Morphew and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Colloidal self-assembly promises to be an elegant and efficient route to the bottom-up fabrication of 3-dimensional structures. Programming hierarchical schemes for colloid self-assembly has the potential to widen structural diversity and mimic biological complexity. However, it remains a grand challenge to bridge hierarchies of multiple length- and time-scales associated with the structure and dynamics along complex self-assembly pathways. This thesis employs a variety of computational techniques to address this challenge in silico, programming colloidal self-assembly for structural hierarchy in close connection with contemporary experimental research. In a series of studies, the self-assembly of designer charge-stabilised colloidal magnetic particles into a number of supracolloidal polyhedra for size-selected clusters is demonstrated. The design space supports self-assembled polyhedra of very different morphologies, namely tubular and hollow spheroidal structures, for which the dominant pathways for self-assembly are elucidated, revealing two distinct mechanisms. Here, it is found that for a staged assembly pathway the structure, which derives the strongest energetic stability from the first stage and the weakest from the second stage, is most kinetically accessible. Stemming from these findings, a generic design principle exploiting a hierarchy of interaction strengths is introduced. This design principle is subsequently employed to demonstrate the hierarchical self-assembly of triblock patchy colloidal particles into a variety of colloidal crystals. Furthermore, this design framework exhibits a novel bottom-up route to the fabrication of cubic diamond colloidal crystals, which until recently, have remained elusive.

Download or read book Handbook of sol gel science and technology 3 Applications of sol gel technology written by Sumio Sakka and published by Springer Science & Business Media. This book was released on 2005 with total page 834 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since Dr. Disiich of Germany prepared a glass lens by the sol-gel method around 1970, sol-gel science and technology has continued to develop. Since then this field has seen remarkable technical developments as well as a broadening of the applications of sol-gel science and technology. There is a growing need for a comprehensive reference that treats both the fundamentals and the applications, and this is the aim of "Handbook of Sol-Gel Science and Technology."The primary purpose of sol-gel science and technology is to produce materials, active and non-active including optical, electronic, chemical, sensor, bio- and structural materials. This means that sol-gel science and technology is related to all kinds of manufacturing industries. Thus Volume 1, "Sol-Gel Processing," is devoted to general aspects of processing. Newly developed materials such as organic-inorganic hybrids, photonic crystals, ferroelectric coatings, photocatalysts will be covered. Topics in this volume include: Volume 2, "Characterization of Sol-Gel Materials and Products, "highlights the important fact that useful materials are only produced when characterization is tied to processing. Furthermore, characterization is essential to the understanding of nanostructured materials, and sol-gel technology is a most important technology in this new field. Since nanomaterials display their functional property based on their nano- and micro-structure, "characterization" is very important. Topics found in Volume 2 include: Sol-gel technology is a versatile technology, making it possible to produce a wide variety of materials and to provide existing substances with novel properties. This technology was applied to producingnovel materials, for example organic-inorganic hybrids, which are quite difficult to make by other fabricating techniques, and it was also applied to producing materials based on high temperature superconducting oxides. "Applications of Sol-Gel Technology," (Volume 3), will cover applications such as:

Download or read book Polymer Colloids written by Rodney Priestley and published by Royal Society of Chemistry. This book was released on 2019-12-02 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt: Academic and industrial research around polymer-based colloids is huge, driven both by the development of mature technologies, e.g. latexes for coatings, as well as the advancement of new materials and applications, such as building blocks for 2D/3D structures and medicine. Edited by two world-renowned leaders in polymer science and engineering, this is a fundamental text for the field. Based on a specialised course by the editors, this book provides the reader with an invaluable single source of reference. The first section describes formation, explaining basic properties of emulsions and dispersion polymerization, microfluidic approaches to produce polymer-based colloids and formation via directed self-assembly. The next section details characterisation methodologies from microscopy and small angle scattering, to surface science and simulations. The final chapters close with applications, including Pickering emulsions and molecular engineering for materials development. A comprehensive guide to polymer colloids, with contributions by leaders in their respective areas, this book is a must-have for researchers and practitioners working across polymers, soft matter and chemical and molecular engineering.

Download or read book Liquid Crystal Colloids written by Igor Muševič and published by Springer. This book was released on 2017-05-14 with total page 313 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book brings together the many concepts and discoveries in liquid crystal colloids contributed over the last twenty years and scattered across numerous articles and book chapters. It provides both a historical overview of the development of the field and a clear perspective on the future applications in photonics. 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. Starting from the early works on nematic colloids, it explains the basics of topological defects in ordered media, charge and winding, and the elastic forces between colloidal particles in nematics. Following a detailed description of experimental methods, such as optical tweezing and particle tracking, the book eases the reader into the theoretical part, which deals with elastic deformation of nematic liquid crystals due to inclusions and surface alignment. This is discussed in the context of basic mean field Landau-de Gennes Q-tensor theory, with a brief explanation of the free-energy minimization numerical methods. There then follows an excursion into the topology of complex nematic colloidal structures, colloidal entanglement, knotting and linking. Nematic droplets, shells, handlebodies and chiral topological structures are addressed in separate chapters. The book concludes with an extensive chapter on the photonic properties of nematic dispersions, presenting the concept of integrated soft matter photonics and discussing the concepts of nematic and chiral nematic microlasers, surface-sensitive photonic devices and smectic microfibers. The text is complemented by a large bibliography, explanatory sketches and beautiful micrographs.

Download or read book Self Assembly of Nanostructures and Patchy Nanoparticles written by Shafigh Mehraeen and published by BoD – Books on Demand. This book was released on 2020-11-04 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: Top-down approaches are currently the main contributor of fabricating microelectronic devices. However, the prohibitive cost of numerous technological steps in these approaches is the main obstacle to further progress. Furthermore, a large number of applications necessitate fabrication of complex and ultra-small devices that cannot be made using these approaches. New approaches based on natural self-assembly of matter need to be developed to allow for fabrication of micro and nanoelectronic devices. Self-assembly of nanostructures is a dynamic field, which explores physics of these structures and new ways to fabricate them. However, the major problem is how to control the properties of the nanostructures resulting from low dimensionality. This book presents recent advances made to address this problem, and fabricate nanostructures using self-assembly.

Download or read book Flowing Matter written by Federico Toschi and published by Springer Nature. This book was released on 2019-09-25 with total page 309 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book, published in the Soft and Biological Matter series, presents an introduction to selected research topics in the broad field of flowing matter, including the dynamics of fluids with a complex internal structure -from nematic fluids to soft glasses- as well as active matter and turbulent phenomena. Flowing matter is a subject at the crossroads between physics, mathematics, chemistry, engineering, biology and earth sciences, and relies on a multidisciplinary approach to describe the emergence of the macroscopic behaviours in a system from the coordinated dynamics of its microscopic constituents. Depending on the microscopic interactions, an assembly of molecules or of mesoscopic particles can flow like a simple Newtonian fluid, deform elastically like a solid or behave in a complex manner. When the internal constituents are active, as for biological entities, one generally observes complex large-scale collective motions. Phenomenology is further complicated by the invariable tendency of fluids to display chaos at the large scales or when stirred strongly enough. This volume presents several research topics that address these phenomena encompassing the traditional micro-, meso-, and macro-scales descriptions, and contributes to our understanding of the fundamentals of flowing matter. This book is the legacy of the COST Action MP1305 “Flowing Matter”.

Download or read book Engineered Colloids written by Dana Rachael Breed and published by ProQuest. This book was released on 2007 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of this dissertation is to develop new colloidal particles that are capable of forming reversible, directional bonds with specific well-defined symmetries. Due to their size, anisotropic colloids are particularly promising for photonic applications, where tetrahedrally-interacting colloids are expected to assemble into a material with a complete band-gap in the visible. However, until now there has yet to be introduced a systematic method of producing monodisperse colloids and assembling them with directional, reversible interactions. Here we show the fabrication and directed assembly of "patchy particles," a set of colloidal molecules comprising an almost-spherical anti-patch and chemically distinct patches with strictly defined symmetry, number and size, located on the particle surface. By maintaining separate functionalizable chemistries on the two types of surfaces, assembly is shown to occur at the patch both by charge screening and by biotin/Neutravidin linkages. We also introduce temperature-induced reversibility to the directed assembly by incorporating ssDNA on the patches. We demonstrate the technique by forming daisy chains from patchy 'dimers, ' particles with two diametrically-opposed patches. We also observe branched chains upon the addition of a small number of higher-order patchy particles. Finally, we fabricate particles with one type of DNA on the patches and another on the anti-patch for use in self-replicating systems of colloids. Our results confirm that anisotropic colloidal molecules may be engineered in a highly reproducible fashion on the bench top and manipulated in water or organic solvent to induce reversible, directed assembly.

Download or read book Anisotropic Nanomaterials written by Quan Li and published by Springer. This book was released on 2015-06-09 with total page 513 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book anisotropic one-dimensional and two-dimensional nanoscale building blocks and their assembly into fascinating and qualitatively new functional structures embracing both hard and soft components are explained. Contributions from leading experts regarding important aspects like synthesis, assembly, properties and applications of the above materials are compiled into a reference book. The anisotropy, i.e. the direction-dependent physical properties, of materials is fascinating and elegant and has sparked the quest for anisotropic materials with useful properties. With such a curiosity, material scientists have ventured into the realm of nanometer length scale and have explored the anisotropic nanoscale building blocks such as metallic and nonmetallic particles as well as organic molecular aggregates. It turns out that the anisotropic nanoscale building blocks, in addition to direction-dependent properties, exhibit dimension and morphology dependence of physical properties. Moreover, ordered arrays of anisotropic nanoscale building blocks furnish novel properties into the resulting system which would be entirely different from the properties of individual ones. Undoubtedly, these promising properties have qualified them as enabling building blocks of 21st century materials science, nanoscience and nanotechnology. Readers will find this book professionally valuable and intellectually stimulating in the rapidly emerging area of anisotropic nanomaterials. Quan Li, Ph.D., is Director of the Organic Synthesis and Advanced Materials Laboratory at the Liquid Crystal Institute of Kent State University, where he is also Adjunct Professor in the Chemical Physics Interdisciplinary Program. He has directed research projects funded by US Air Force Research Laboratory (AFRL), US Air Force Office of Scientific Research (AFSOR), US Army Research Office (ARO), US Department of Defense Multidisciplinary University Research Initiative (DoD MURI), US National Science Foundation (NSF), US Department of Energy (DOE), US National Aeronautics and Space Administration (NASA), Ohio Third Frontier, and Samsung Electronics, among others.

Download or read book Molecularly Imprinted Polymers as Advanced Drug Delivery Systems written by Zhaosheng Liu and published by Springer Nature. This book was released on 2021-04-23 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book summarizes the recent advancements for drug delivery systems (DDS) in terms of fundamental principles, rapidly emerging techniques and developing frontiers of molecular imprinting. Especially with the combination of enantioselective molecularly imprinted polymers and water compatible molecularly imprinted polymers, stimuli responsive imprinted DDS have been innovated and applied to dermal delivery, ophthalmic drugs and cancer treatment. This philosophy comprehensively revolutionizes the treatment strategy of human healthcare and provides the possibility to re-trigger in vivo an exhaust system after the complete release of the starting drug cargo, thus enabling precision medicine. To this end, the following unique features will be discussed and concluded: 1) State-of-the-art definition of MIP as drug delivery systems. 2) Advanced techniques and clinical applications of MIP as drug delivery systems in the past decade. 3) Novel frontiers and brand-new technologies, for example, drug delivery devices for zero-order sustained release and stimuli responsive imprinted DDS. 4) Revolutionary impact on dermal delivery, ophthalmic drugs and cancer treatment. 5) Future challenges and perspectives

Download or read book Colloids written by Mohamed Nageeb Rashed and published by BoD – Books on Demand. This book was released on 2021-09-08 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: Colloids are submicron particles that are ubiquitous in both natural and industrial products. Colloids and colloidal systems play a significant role in human health as well as commercial and industrial situations. Colloids have important applications in medicine, sewage disposal, water purification, mining, photography, electroplating, agriculture, and more.This book gathers recent research from experts in the field of colloids and discusses several aspects of colloid morphology, synthesis, and applications. The book is divided into three sections that cover different techniques for the synthesis of colloids, the structure, dynamic and stability of colloids, and applications of colloidal particles, respectively.

Download or read book Colloidal Particles at Liquid Interfaces written by Bernard P. Binks and published by Cambridge University Press. This book was released on 2006-08-17 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: The understanding of how small solid particles operate at liquid interfaces is minimal. This book brings together the topics actively being investigated, with contributions from experts in the field. It will be of interest to researchers in chemistry, physics, chemical engineering, pharmacy, food science and materials science.