Download or read book On Effective Interactions and Phase Transitions in Colloidal Suspensions written by H. Lowen and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Phase Transitions in Colloidal Suspensions written by B. J. Ackerson and published by CRC Press. This book was released on 1990 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first five articles in this issue emphasize equilibrium phases and structures. The hard sphere properties of sterically stabilized particle suspensions are examined in the article by van Megan, Pusey and Bartlett, a colloidal compound is discussed by Hachisu and attractive interactions are shown to produce a full complement of phase transitions including a liquid/gas transition by Emmett and Vincent. Recent theoretical interest in the nature of melting in two dimensions has led to the investigation of the melting transition in colloidal systems where the particles are constrained to a single layer. Murray, Van Winkle and Wenk present experimental results supporting the view that two dimensional melting is mediated by two second order transitions, while Tang, Armstrong, Mockler and O'Sullivan present results suggesting a first order process in a similar colloidal monolayer.
Download or read book Phase Behavior and Effective Interactions in Colloidal Suspensions written by and published by Cuvillier Verlag. This book was released on 2007-04-25 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: Colloidal suspensions describe particles with size from typically a few nanometers to a few microns which are dispersed in a medium. In physics, in chemistry, and in biology colloids play an important role and the study of colloidal systems underwent a recent renaissance. This is based on the development of experimental techniques, the availability of extensive computer simulations and well-developed theoretical approaches. From a technological point of view, the relevance of micro- and nanostructured materials and the presence of colloids in nature and everyday life motivates study of this rich field. In this thesis the phase behavior and the effective interactions of colloidal suspensions in bulk, in contact with surfaces, and in confined geometry are studied. For mixtures of particles with hard-core interactions the model introduced by Asakura, Oosawa and Vrij provides an appropriate starting-point. Based on that model the free-volume theory and the density functional theory are employed. In experimental systems one faces particles with properties such as the size or the shape which are described by a distribution. To capture that issue a generalized approach based on free-volume theory for treating mixtures of colloids and a polydisperse depletion agent is presented. Within that approach it is possible to treat size and morphology polydispersity. A depletion agent with a bimodal distribution possessing two length scales can be studied. Though the Asakura-Oosawa-Vrij model describes a simple fluid - a mixture of hard spheres and ideal polymer - the phenomenology is rather rich: in contact with a wall one finds layering and wetting effects and in confined geometry of a narrow pore one finds capillary condensation. The competition between both effects manifests itself in thermodynamic properties like the excess colloid adsorption and the solvation force between the two confining walls. Solvent phase separation complicates the evaluation of interparticle interactions between the solute particles. We address this question for the wall-colloid and the colloid-colloid geometry. For a non-spherical particle the effect of curvature on thermodynamic quantities is studied.
Download or read book CECAM Workshop on Effective Interactions and Phase Transitions in Colloidal Suspensions written by H. Löwen and published by . This book was released on 1999 with total page 629 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Computational Study of Colloids in Suspension Effective Interactions and Phase Transitions written by Jiwen Liu and published by . This book was released on 2006 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: The focus of my Ph.D work is to develop and apply computer simulation methods for understanding the properties of colloidal suspensions. Since colloidal suspensions typically contain different species and display a complicated spectrum of effective interactions, a wealth of interesting features has been observed and a wide range of applications has been established. However, the presence of various species with very different length and time scales causes a severe slow-down in simulations of such multi-component systems. Although available computational power continues to increase steadily, modeling such systems can make the simulations prohibitively expensive, so that further progress will critically depend on algorithmic advances. One of the main results in my Ph.D study is the development of a novel Monte Carlo method that alleviates this slow-down problem. The so-called generalized geometric cluster algorithm applies geometric transformations to identify clusters of particles. Owing to the non-local and rejection-free features of cluster moves, typical efficiency improvements achieved by this algorithm amount to several orders of magnitude as compared to conventional simulation methods. In this thesis, a detailed description of the geometric cluster algorithm, including its properties, efficiency, applications and future extensions are presented. Using the generalized geometric cluster algorithm, we have carried out a comprehensive study of effective interactions between micron-sized silica spheres, induced by highly charged zirconia nanoparticles. Explicit modeling of the colloidal particles and nanoparticles demonstrates that the effective interactions induced by nanoparticles are responsible for a colloidal stabilization mechanism recently discovered in experiments. To study the phase behavior of colloidal fluids, the geometric cluster algorithm has been incorporated into the Restricted Gibbs ensemble where the density and concentration fluctuations that drive phase transitions can be probed directly. We have developed a finite-size scaling theory that relates these density fluctuations to those of the grand-canonical ensemble, thereby enabling accurate location of critical points and coexistence curves of multi-component fluids. Several illustrative examples are presented. The development of the geometric cluster algorithm makes it possible to simulate colloidal solutions containing highly size-asymmetric species that are inaccessible to conventional simulation algorithms. Further applications and developments of variants of the geometric cluster algorithm will arise in future studies.
Download or read book Ordering and Phase Transitions in Charged Colloids written by A. K. Arora and published by Wiley-VCH. This book was released on 1996-12-17 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: * Physical chemists will find this book comprehensive. Topical reviews on all aspects of colloidal ordering and related phase transitions will be covered. It provides a good blend of experimental and theoretical investigations. * Useful to materials scientists and chemical engineers, the book includes a discussion of stability, important from the point of view of applications of colloidal crystals. * Physicists will be interested in the book, because it highlights the controversy over effective interparticle interaction in charged colloids.
Download or read book CECAM Workshop on Effective Interactions and Phase Transitions in Colloidal Suspensions Lyon France 28 30 June 1999 written by and published by . This book was released on 1999 with total page 630 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Observation Prediction and Simulation of Phase Transitions in Complex Fluids written by Marc Baus and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 669 pages. Available in PDF, EPUB and Kindle. Book excerpt: Observation, Prediction and Simulation of Phase Transitions in Complex Fluids presents an overview of the phase transitions that occur in a variety of soft-matter systems: colloidal suspensions of spherical or rod-like particles and their mixtures, directed polymers and polymer blends, colloid--polymer mixtures, and liquid-forming mesogens. This modern and fascinating branch of condensed matter physics is presented from three complementary viewpoints. The first section, written by experimentalists, emphasises the observation of basic phenomena (by light scattering, for example). The second section, written by theoreticians, focuses on the necessary theoretical tools (density functional theory, path integrals, free energy expansions). The third section is devoted to the results of modern simulation techniques (Gibbs ensemble, free energy calculations, configurational bias Monte Carlo). The interplay between the disciplines is clearly illustrated. For all those interested in modern research in equilibrium statistical mechanics.
Download or read book Special Issue written by H. Lowen and published by . This book was released on 1999 with total page 629 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Complex Plasmas And Colloidal Dispersions Particle resolved Studies Of Classical Liquids And Solids written by Alexei Ivlev and published by World Scientific Publishing Company. This book was released on 2012-05-30 with total page 337 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many fundamental issues in classical condensed matter physics can be addressed experimentally using systems of individually visible mesoscopic particles playing the role of “proxy atoms”. The interaction between such “atoms” is determined by the properties of the surrounding medium and/or by external tuning. The best-known examples of such experimental model systems are two different domains of soft matter — complex plasmas and colloidal dispersions.The major goal of this book — written by scientists representing both complex plasmas and colloidal dispersions — is to bring the two fields together. In the first part of the book the basic properties of the two systems are summarized, demonstrating huge conceptual and methodological overlap of the fields and emphasizing numerous cross-connections between them and their essential complementarity. This “introductory part” should serve to help each community in understanding the other field better. Simultaneously, this provides the necessary basis for the second part focused on particle-resolved studies of diverse generic phenomena in liquids and solids — all performed with complex plasmas and/or colloidal dispersions. The book is concluded with the discussion of critical open issues and fascinating perspectives of such interdisciplinary research.
Download or read book Colloids and the Depletion Interaction written by Henk N. W. Lekkerkerker and published by Springer Nature. This book was released on with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Suspensions of Colloidal Particles and Aggregates written by Frank Babick and published by Springer. This book was released on 2016-04-04 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book addresses the properties of particles in colloidal suspensions. It has a focus on particle aggregates and the dependency of their physical behaviour on morphological parameters. For this purpose, relevant theories and methodological tools are reviewed and applied to selected examples. The book is divided into four main chapters. The first of them introduces important measurement techniques for the determination of particle size and interfacial properties in colloidal suspensions. A further chapter is devoted to the physico-chemical properties of colloidal particles—highlighting the interfacial phenomena and the corresponding interactions between particles. The book’s central chapter examines the structure-property relations of colloidal aggregates. This comprises concepts to quantify size and structure of aggregates, models and numerical tools for calculating the (light) scattering and hydrodynamic properties of aggregates, and a discussion on van-der-Waals and double layer interactions between aggregates. It is illustrated how such knowledge may significantly enhance the characterisation of colloidal suspensions. The final part of the book refers to the information, ideas and concepts already presented in order to address technical aspects of the preparation of colloidal suspensions—in particular the performance of relevant dispersion techniques and the stability of colloidal suspensions.
Download or read book Soft Matter Volume 2 written by Gerhard Gompper and published by John Wiley & Sons. This book was released on 2006-02-10 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soft Matter encompasses a wide range of systems of varying components, including synthetic and biological polymers, colloids, and amphiphiles. The distinguishing features of these systems is their characteristic size, which is much larger than that of their atomic counterparts, and their characteristic energy, which is much smaller. Because of their ability to assemble themselves into complex structures, they form the major components of biological systems and technological applications. This second volume of the unique interdisciplinary "Soft Matter" series comprehensively describes colloids and their properties. The structural and thermodynamic properties of mixtures of rod-like and spherical colloids and of mixtures colloids and polymers, as well as the dynamical behavior of rod-like colloids are treated in depth. Again leading scientists have contributed articles that both introduce readers to this field, and serve as a source of reference for experts.
Download or read book Phase Transition of Colloidal Suspensions in Equilibrium and Non equilibrium written by Gerd Paul Hoffmann and published by . This book was released on 2001 with total page 107 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Symmetry Breaking in Suspensions of Anisotropic Colloids written by S. Belli and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lectures on Phase Transitions written by V. I. Yukalov and published by World Scientific. This book was released on 1990 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book treats the problem of phase transitions, emphasizing the generality and universality of the methods and models used. The course is basically concentrated on the problems of vacuum degeneration in macroscopic systems and a fundamental concept of quasiaverages by Bogolubov playing a special role in the theory of phase transitions and critical phenomena. An analysis of the connection between phase transition and spontaneous symmetry breaking in a macroscopic system allows a unique description of both first- and second-order phase transitions.The unique features of this book are: (i) a unique approach of describing first ? as well as second-order phase transitions, based on the Bogolubov concept of quasi-averages.(ii) a detailed presentation of the material and at the same time a review of modern problems.(iii) a general character of developed ideas that could be applied to various particular systems of condensed matter physics, nuclear physics and high-energy physics.
Download or read book Geometry And Phase Transitions In Colloids And Polymers written by William Kung and published by World Scientific. This book was released on 2009-05-04 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: This monograph represents an extension of the author's original PhD thesis and includes a more thorough discussion on the concepts and mathematics behind his research works on the foam model, as applied to studying issues of phase stability and elasticity for various non-closed packed structures found in fuzzy and colloidal crystals, as well as on a renormalization-group analysis regarding the critical behavior of loop polymers upon which topological constraints are imposed. The common thread behind these two research works is their demonstration of the importance and effectiveness of utilizing geometrical and topological concepts for modeling and understanding soft systems undergoing phase transitions.
