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Author : Francesco Puosi
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (955 download)
Download or read book Relaxation, Short Time Dynamics and Elastic Properties in Glass-forming Liquids written by Francesco Puosi and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Wolfgang Götze
Publisher : Oxford University Press on Demand
ISBN 13 : 0199235341
Total Pages : 654 pages
Book Rating : 4.1/5 (992 download)
Download or read book Complex Dynamics of Glass-Forming Liquids written by Wolfgang Götze and published by Oxford University Press on Demand. This book was released on 2009 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt: Amorphous condensed matter can exhibit complex motions on time scales which extend up to those relevant for the functioning of biomaterials. The book presents the derivation of a microscopic theory for amorphous matter, which exhibits the evolution of such complex motions as a new paradigm of strongly interacting particle systems.e
Author : E. Donth
Publisher : Springer Science & Business Media
ISBN 13 : 3662043653
Total Pages : 433 pages
Book Rating : 4.6/5 (62 download)
Download or read book The Glass Transition written by E. Donth and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 433 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes and interrelates the following processes: cooperative alpha processes in a cold liquid, structural relaxation in the glass near Tg, the Johari-Goldstein beta process, the Williams-Götze process in a warm liquid, fast nonactivated cage rattling and boson peak, and ultraslow Fischer modes.
Author : Michela Romanini
Publisher :
ISBN 13 :
Total Pages : 321 pages
Book Rating : 4.:/5 (112 download)
Download or read book Relaxation Dynamics in Disordered Systems written by Michela Romanini and published by . This book was released on 2015 with total page 321 pages. Available in PDF, EPUB and Kindle. Book excerpt: The nature of the glass transition and of the glassy state is a fundamental and still unsolved problem of condensed matter physics. Many liquids can be supercooled below their melting point without crystallizing, that is, without acquiring translational and orientational order. As the temperature of a supercooled liquid is lowered, the characteristic timescale of moleuclar motions, called relaxation time, increases until it becomes comparable to the timescale of human experimentation. This takes place at the glass transition temperature and leads to a non-equilibrium state of matter, called a ¿structural glass¿, in which a liquid-like lack of order is combined with solid-like elastic properties. Glass transitions are also observed in systems where there is only orientational disorder, such as orientationally disordered (OD) crystals or plastic crystals, which are translationally ordered solids in which the constituent molecules display reorientational motions about their centres of mass. Upon supercooling an OD crystal, the orientational disorder can ¿freeze¿, yielding a so-called ¿orientational glass¿. In molecular materials forming structural or orientational glasses, the most important molecular dynamics process is the cooperative motion of the molecules, referred to as primary relaxation, whose freezing marks the transition to the glass state characterized by static disorder. The main difference between orientational and structural glasses is that in the former the freezing involves exclusively the rotational degrees of freedom of the molecules, while in the latter all six molecular degrees of freedom (i.e., both orientational and translational ones) are frozen. Orientational glasses are therefore systems with fewer degrees of freedom than structural glasses. This simplification, together with the fact that many OD phases are characterized by a crystal lattice with high symmetry, makes OD phases a model playground to investigate the nature of the glass transition. Other than the primary relaxation, there can be also so-called ¿secondary relaxations¿, usually characterized by shorter relaxation time than the primary process. Secondary relaxations may have different origins; for example, they can be due to conformational fluctuations or intramolecular vibrations; in many cases a special kind of secondary relaxation is observed, which is the single-molecule precursor process of the primary relaxation. This thesis focuses on the effect of pressure and temperature on the dynamics of several pure compounds and binary mixtures forming structural or orientational glasses. We present a comparative study between two structural glass formers (ternidazole and the mixture of m-fluoroaniline with m-xylene), a plastic binary mixed crystal (neopenthyl alchol and neopentyl glycol), and two materials displaying statistical orientational disorder (2-adamantanone and pentachloronitrobenzene). In all cases a primary relaxation is present, associated with the collective motion of the molecules, and in most cases also secondary relaxations are observed. For each material, we analyse the temperature- and pressure-dependence of the various molecular relaxation and discuss the origin of secondary processes. One of the most important results of the thesis is the presence of secondary relaxations also in systems with low-dimensional disorder that behave similarly to the secondary relaxations observed in structural glasses.
Author : George Floudas
Publisher : Springer Science & Business Media
ISBN 13 : 3642049028
Total Pages : 183 pages
Book Rating : 4.6/5 (42 download)
Download or read book Molecular Dynamics of Glass-Forming Systems written by George Floudas and published by Springer Science & Business Media. This book was released on 2010-11-25 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pressure is one of the essential thermodynamic variables that, due to some former experimental difficulties, was long known as the “forgotten variable.” But this has changed over the last decade. This book includes the most essential first experiments from the 1960's and reviews the progress made in understanding glass formation with the application of pressure in the last ten years. The systems include amorphous polymers and glass-forming liquids, polypeptides and polymer blends. The thermodynamics of these systems, the relation of the structural relaxation to the chemical specificity, and their present and future potential applications are discussed in detail. The book provides (a) an overview of systems exhibiting glassy behavior in relation to their molecular structure and provides readers with the current state of knowledge on the liquid-to-glass transformation, (b) emphasizes the relation between thermodynamic state and dynamic response and (c) shows that the information on the pressure effects on dynamics can be employed in the design of materials for particular applications. It is meant to serve as an advanced introductory book for scientists and graduate students working or planning to work with dynamics. Several scientific papers dealing with the effects of pressure on dynamics have appeared in leading journals in the fields of physics in the last ten years. The book provides researchers and students new to the field with an overview of the knowledge that has been gained in a coherent and comprehensive way.
Author : Thomas Dorfmüller
Publisher : Springer
ISBN 13 :
Total Pages : 236 pages
Book Rating : 4.3/5 (91 download)
Download or read book Molecular Dynamics and Relaxation Phenomena in Glasses written by Thomas Dorfmüller and published by Springer. This book was released on 1987-04-23 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the proceedings of a workshop on glass-forming liquids held at the University of Bielefeld in 1985. The aim of the meeting was to seek unifying interpretations which may apply to all glass-forming materials like inorganic and polymer glasses. Also, new data was presented and modern interpretations were applied which represent the state-of-the-art knowledge about the unusual physical properties of these chemically-diverse glass-forming materials. The book should be of interest to specialists in the subject, to polymer scientists, glass technologists and materials scientists, but also - and most importantly - to researchers and teachers who wish to become informed on some of the most recent fundamental research in the fields.
Author : Ernst-Joachim Donth
Publisher :
ISBN 13 : 9783662043660
Total Pages : 440 pages
Book Rating : 4.0/5 (436 download)
Download or read book The Glass Transition written by Ernst-Joachim Donth and published by . This book was released on 2014-09-01 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Moises Levy
Publisher : Academic Press
ISBN 13 : 0080924255
Total Pages : 2513 pages
Book Rating : 4.0/5 (89 download)
Download or read book Handbook of Elastic Properties of Solids, Liquids, and Gases, Four-Volume Set written by Moises Levy and published by Academic Press. This book was released on 2000-10-23 with total page 2513 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sound waves propagate through galactic space, through two-dimensional solids, through biological systems, through normal and dense stars, and through everything that surrounds us; the earth, the sea, and the air. We use sound to locate objects, to identify objects, to understand processes going on in nature, to communicate, and to entertain. The elastic properties of materials determine the velocity of sound in them and tell us about their response to stresses something which is very important when we are trying to construct, manufacture, or create something with any material. The Handbook of Elastic Properties of Materials will provide these characteristics for almost everything whose elastic properties has ever been measured or deduced in a concise and approachable manner. Leading experts will explain the significance of the elastic properties as they relate to intrinsic microscopic behavior, to manufacturing, to construction, or to diagnosis. They will discuss the propagation of sound in newly discovered or created materials, and in common materials which are being investigated with a fresh outlook. The Handbook will provide the reader with the elastic properties of the common and mundane, the novel and unique, the immense and the microscopic, and the exhorbitantly dense and the ephemeral.. You will also find the measurement. And theoretical techniques that have been developed and invented in order to extract these properties from a reluctant nature and recalcitrant systems. Key Features * Solids, liquids and gases covered in one handbook * Articles by experts describing insights developed over long and Illustrious careers * Properties of esoteric substances, such as normal and dense stars, superfluid helium three, fullerness, two dimensional solids, extraterrestial substances, gems and planetary atmospheres * Properties of common materials such as food, wood used for musical instruments, paper, cement, and cork * Modern dynamic elastic properties measurement techniques
Author : VICTORIA GARCIA SAKAI
Publisher : Springer Science & Business Media
ISBN 13 : 1461407265
Total Pages : 455 pages
Book Rating : 4.4/5 (614 download)
Download or read book Dynamics of Soft Matter written by VICTORIA GARCIA SAKAI and published by Springer Science & Business Media. This book was released on 2011-12-19 with total page 455 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dynamics of Soft Matter: Neutron Applications provides an overview of neutron scattering techniques that measure temporal and spatial correlations simultaneously, at the microscopic and/or mesoscopic scale. These techniques offer answers to new questions arising at the interface of physics, chemistry, and biology. Knowledge of the dynamics at these levels is crucial to understanding the soft matter field, which includes colloids, polymers, membranes, biological macromolecules, foams, emulsions towards biological & biomimetic systems, and phenomena involving wetting, friction, adhesion, or microfluidics. Emphasizing the complementarities of scattering techniques with other spectroscopic ones, this volume also highlights the potential gain in combining techniques such as rheology, NMR, light scattering, dielectric spectroscopy, as well as synchrotron radiation experiments. Key areas covered include polymer science, biological materials, complex fluids and surface science.
Author : Steven Brawer
Publisher : Amer Ceramic Society
ISBN 13 : 9780916094683
Total Pages : 220 pages
Book Rating : 4.0/5 (946 download)
Download or read book Relaxation in Viscous Liquids and Glasses written by Steven Brawer and published by Amer Ceramic Society. This book was released on 1985-01-01 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : C. A. Angell
Publisher :
ISBN 13 :
Total Pages : 544 pages
Book Rating : 4.:/5 (318 download)
Download or read book Glasses and Glass Formers - Current Issues: Volume 455 written by C. A. Angell and published by . This book was released on 1997-07-08 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book brings together researchers from various backgrounds dealing with the manifestations of the glassy or liquid state of matter, and with the ubiquitous characteristics of the structure and dynamic properties. The goal of this book is to compare the relative merits of different theoretical, computational and experimental approaches to the subject, and to promote the exchange of ideas between the individual disciplines. Papers reflect state-of-the-art knowledge on processes involved in glass formation, and on the relationships between structure and properties of glass-forming liquids, synthetic polymers and biopolymers. Emphasis is on novel experimental techniques, developments in computational methods, and on recent theoretical models which are improving the understanding of the observed phenomena. Topics include: short-time dynamics; relaxation dynamics of glasses and glass formers; glass-like systems, simulations and models; contrasting metallic, ionic, bio and polymer systems; structure, energetics and polyamorphism; and structure and dynamics of glasses and glass formers.
Author : Michael I. Klinger
Publisher : World Scientific
ISBN 13 : 9814407488
Total Pages : 339 pages
Book Rating : 4.8/5 (144 download)
Download or read book Glassy Disordered Systems written by Michael I. Klinger and published by World Scientific. This book was released on 2013 with total page 339 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present book describes the fundamental features of glassy disordered systems at high temperatures (close to the liquid-to-glass transition) and for the first time in a book, the universal anomalous properties of glasses at low energies (i.e. temperatures/frequencies lower than the Debye values) are depicted. Several important theoretical models for both the glass formation and the universal anomalous properties of glasses are described and analyzed. The origin and main features of soft atomic-motion modes and their excitations, as well as their role in the anomalous properties, are considered in detail. It is shown particularly that the soft-mode model gives rise to a consistent description of the anomalous properties. Additional manifestations of the soft modes in glassy phenomena are described. Other models of the anomalous glassy properties can be considered as limit cases of the soft-mode model for either very low or moderately low temperatures/frequencies.
Author : Michio Tokuyama
Publisher : American Institute of Physics
ISBN 13 :
Total Pages : 624 pages
Book Rating : 4.3/5 (91 download)
Download or read book Flow Dynamics written by Michio Tokuyama and published by American Institute of Physics. This book was released on 2006-05-25 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides up-to-date information on flow dynamics for experimental, theoretical, and computational researchers in a variety of fields, such as physics, chemistry, biology, engineering, polymer science, and computer science. The proceedings contain review articles by leading scientists as well as contributed papers by authors on the forefront of research. All manuscripts were peer-reviewed.
Author : Yuri P. Kalmykov
Publisher : John Wiley & Sons
ISBN 13 : 0471725080
Total Pages : 756 pages
Book Rating : 4.4/5 (717 download)
Download or read book Fractals, Diffusion, and Relaxation in Disordered Complex Systems, Volume 133, Part B written by Yuri P. Kalmykov and published by John Wiley & Sons. This book was released on 2006-06-30 with total page 756 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fractals, Diffusion and Relaxation in Disordered Complex Systems is a special guest-edited, two-part volume of Advances in Chemical Physics that continues to report recent advances with significant, up-to-date chapters by internationally recognized researchers.
Author : Karan Doss
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (134 download)
Download or read book Fundamentals of Nonexponential Relaxation in Glass Forming Systems written by Karan Doss and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The remarkable complexity in the emergent behaviors exhibited by glass-forming systems have captivated physicists for the better half of the 20th century and continue to be at the forefront of condensed matter research today. Glass-forming systems are atomically disordered and relax nonexponentially when perturbed out of equilibrium. Nonexponential relaxation attracts research interest from disparate fields and has been studied across multiple levels of abstraction. The complex nature of its origins has thus far precluded the derivation of first-principles models that establish a well-defined relationship between the glass-former chemistry and corresponding macroscopic properties of interest. This has inevitably yielded numerous phenomenological models that do not stand on strong theoretical foundations. The work presented herein establishes the thermodynamic foundations of structural relaxation and elucidates the origins of heuristic mathematical models that have been successful in modeling nonexponential relaxation in glass. In this dissertation, the mean relaxation time predicted by the Maxwell relation for stress relaxation is examined. The Maxwell relation is derived within the Markov Network Model framework which is rooted in the energy landscape description of a material. An expression for the average relaxation time under equilibrium and nonequilibrium conditions are presented. It is shown that relaxation time calculated using the Maxwell relation is mismatched with the structural relaxation time. Experimental evidence is presented to show that the relaxation time obtained from shear viscosity measurements must correspond to the stress relaxation time. Subsequently, a fundamental thermodynamic description of structural relaxation in glasses is developed by establishing a link between the Prony series solution to structural relaxation derived from the principles of irreversible thermodynamics and asymmetric Lévy stable distribution of relaxation rates. Additionally, it is shown that the bulk viscosity of glass, and not the shear viscosity, is the transport coefficient that is kinetically coupled to the structural relaxation process. The distribution of relaxation times and energy barrier heights underpinning stretched exponential relaxation are derived. It is shown that a stretched exponential response necessitates the generation of a power-law or fractal distribution of relaxation times, indicating an underlying symmetry of scale-invariance in time arising from heterogeneous dynamics. The presence of large scatter in linear response data has cast doubt on the existence of an inverse correlation between liquid fragility and nonexponentiality. In this light, a model for the temperature dependence of the stretching exponent is presented based on the MYEGA model for supercooled liquid viscosity. The factors impacting the relationship between fragility and the stretching exponent at the glass transition are elucidated using this model. It is shown that the dispersion in topological degrees of freedom is proportional to the deviation from exponential behavior at the glass transition for glass formers with identical fragilities. Lastly, this dissertation lays the groundwork for disambiguating the complex dynamics of glass through the use of data-driven modeling. While molecular dynamics simulations have provided invaluable insights into the atomic-scale dynamics underpinning a broad range of glass chemistries, they offer no direct insight into the collective modes underpinning the dynamics. Dynamic Mode Decomposition, an emerging data-driven technique, is used to recover the collective modes embedded in high-dimensional time-series data obtained from molecular dynamics simulations. The recovered modes are mined to study the relationship between structure and the dynamics using pressure quenched Silica as a model system. The proposed technique is easy to implement, scalable, and easily adapted to study the relationship between glass chemistry, thermal, and pressure histories, and the underlying dynamics.
Author : Yuri P. Kalmykov
Publisher : John Wiley & Sons
ISBN 13 : 0471790257
Total Pages : 432 pages
Book Rating : 4.4/5 (717 download)
Download or read book Fractals, Diffusion, and Relaxation in Disordered Complex Systems written by Yuri P. Kalmykov and published by John Wiley & Sons. This book was released on 2006-07-18 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fractals, Diffusion, and Relaxation in Disordered Complex Systems is a special guest-edited, two-part volume of Advances in Chemical Physics that continues to report recent advances with significant, up-to-date chapters by internationally recognized researchers.
Author : Punit Boolchand
Publisher : Frontiers Media SA
ISBN 13 : 2889639878
Total Pages : 190 pages
Book Rating : 4.8/5 (896 download)
Download or read book Topology of Disordered Networks and their Applications written by Punit Boolchand and published by Frontiers Media SA. This book was released on 2020-09-03 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact.
