Download or read book Single Molecule Studies of Flexible Polymer Systems written by and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Single Molecule Studies of Flexible Polymers Under Shear and Mixed Flows written by Rodrigo Esquivel Teixeira and published by . This book was released on 2005 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Single Stranded DNA A New Model System for Single Molecule Polymer Dynamics written by Christopher A. Brockman and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The study of polymer dynamics has been an active area of research for many years. For nearly two decades, fluorescently-labeled double stranded DNA (dsDNA) has been the model system for studying single molecule polymer dynamics in non-equilibrium conditions. However, dsDNA is a semiflexible polymer with markedly different local molecular properties compared to flexible polymer chains, such as synthetic organic polymers. In this work, we developed a new model system for single molecule studies of flexible polymers based on single stranded DNA (ssDNA). Using a biochemical synthesis scheme called rolling circle replication, long strands (>25 ℗æm) of ssDNA containing 0́−designer sequences0́+ have been generated to prevent intramolecular base pairing. Polymer chains are synthesized with amine modified bases incorporated along the backbone to facilitate labeling with fluorescent dyes. As proof-of-principle demonstration of this new chemical platform, we use epifluorescence microscopy to image individual ssDNA molecules stretching in an extensional flow generated inside a microfluidic device. It is anticipated that the model polymer system presented here will serve to promote further investigations of flexible polymer dynamics at the molecular level.

Download or read book Single Molecule Force Extension Measurement on Semi Flexible Biopolymers Using Magnetic Tweezers written by Sun Ju Kim and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymers are pervasive in modern society and are commonly encountered in a wide-range of industrial processes. Polymer chains exhibit complex dynamical phenomena in solutions undergoing convective transport, and a proper understanding of chain dynamics is key to optimizing process conditions. The molecular structure of a polymer chain ultimately determines the macroscopic mechanical response and overall physical properties of polymer solutions and melts. Therefore, the study of polymer chain dynamics is essential to understanding the relationship between polymer chain structure and function. In this thesis, the elasticity of semi-flexible polymers is characterized using double stranded lambda-phage DNA. Single DNA molecules are studied using magnetic tweezers and an inverted fluorescence microscope. Magnetic forces in the piconewton range are applied to individual DNA molecules, and the relative chain extension due to applied force is directly measured and shown to be between 15% and 75% of the polymer contour length (16.3 ℗æm for lambda-phage DNA). The results obtained from this experiment compare favorably to the analytical formula for DNA elasticity derived by Marko and Siggia and previous experimental data obtained using an optical tweezers assay. In addition, a magnetic tweezers set up has been designed, constructed and validated, and this single molecule assay can be further used to study novel polymeric systems, such as chemically-modified single stranded DNA, a flexible polymer. Overall, the research presented in this thesis provides the groundwork for novel investigation of novel polymeric systems at the single molecule level.

Download or read book Thermodynamics of Systems Containing Flexible Chain Polymers written by V.J. Klenin and published by Elsevier. This book was released on 1999-06-03 with total page 851 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book deals with the problems of the thermodynamics of systems containing flexible-chain polymers as the basis of polymer material science. The main thermodynamic quantities and concepts are introduced and discussed in the order of the objects getting more and more complicated: gases, magnets, low-molecular-weight substances and mixtures, and finally, polymers and polymer blends. All topics are considered in a common clue, using the principle of universality. The stability conditions for the one-phase state of multi-component systems are given. Phase separation is regarded as a result of loss in stability. The critical state of a system, with the one-phase state being close to the boundary of stability conditions breaking, is discussed in detail. The effects of both light scattering (elastic and dynamic) and diffusion, as directly depending on the thermodynamic parameters characterizing the one-phase state stability, are considered in detail. One of the versions of colloid scattering, namely, the turbidity spectrum method, is described as useful for the characterization of various heterogeneous structures and for the phase analysis of polymer systems. In the approximation of mean field theories and advanced field theory, formalisms expound the following divisions of the thermodynamics of binary and polynary systems with flexible-chain polymers: conformation of the polymer coil, composition fluctuations, elastic and dynamic light scattering, diffusion in the one-phase state (including the critical range), phase separation, polymer fractionation, the coil-globule transition, phase equilibrium and separation in the system network polymer + low-molecular-weight liquid, polymer blends and multiphase separation.

Download or read book Single Molecule Studies of Structure property Relationships in Well defined Conjugated Oligomers and Push pull Conjugated Polymers written by Beiyue Shao and published by . This book was released on 2017 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: The electronic properties of conjugated polymers are strongly dependent on their morphologies. Despite continuous research efforts in conjugated polymers (CPs) as a promising alternative to traditional inorganic semiconductors for flexible and wearable optoelectronic devices, the morphological and associated electronic properties in CPs still remain ambiguous due to their inherently heterogeneous structures both at the bulk film level and single molecule level. In the studies presented in this dissertation, single molecule spectroscopy techniques were employed to understand the single chain morphology and how it affected photophysics. Structurally well-defined model materials based on bis(2-ethylhexyl)-p-phenylene vinylene (BEH-PPV) oligomers, as a simplified model of CPs, were strategically designed to control folding at the single molecule level. Significant morphological variations were found by incorporating both rigid bent and linear linkers into the backbone, as well as by manipulating the chromophore size. The longest chromophore with the linear linker displayed best single molecule folding order and the film packing was further reinforced by the stronger [pi]-[pi] interactions between the longer conjugated segments. In addition, single chain folding via hydrogen-bonding side chain inclusion was demonstrated on the otherwise isotropic model material composed of a series of BEH-PPV trimers linked with flexible linkers. In comparison with a control oligomer system with non-hydrogen-bonding side chains, the oligomers with hydrogen-bonding motifs showed highly ordered structures and enhanced monomer interactions. These studies were further extended to a new class of emerging push-pull conjugated polymers (also known as donor-acceptor copolymers), specifically poly[N-(1- octylnonyl)-2,7-carbazole]-alt-5,5-[4’,7’-di(thien-2-yl)-2’,1’,3’-benzothiadiazole] (PCDTBT). By probing the polymer chain folding as a function of molecular weight using single molecule techniques, it was found that there are two emissive species in this material. Above a critical molecular weight, the polymer transitions from a non-interacting, more ordered conformation to a self-interacting, more isotropic conformation.

Download or read book Polymer Science A Comprehensive Reference written by and published by Newnes. This book was released on 2012-12-05 with total page 7752 pages. Available in PDF, EPUB and Kindle. Book excerpt: The progress in polymer science is revealed in the chapters of Polymer Science: A Comprehensive Reference, Ten Volume Set. In Volume 1, this is reflected in the improved understanding of the properties of polymers in solution, in bulk and in confined situations such as in thin films. Volume 2 addresses new characterization techniques, such as high resolution optical microscopy, scanning probe microscopy and other procedures for surface and interface characterization. Volume 3 presents the great progress achieved in precise synthetic polymerization techniques for vinyl monomers to control macromolecular architecture: the development of metallocene and post-metallocene catalysis for olefin polymerization, new ionic polymerization procedures, and atom transfer radical polymerization, nitroxide mediated polymerization, and reversible addition-fragmentation chain transfer systems as the most often used controlled/living radical polymerization methods. Volume 4 is devoted to kinetics, mechanisms and applications of ring opening polymerization of heterocyclic monomers and cycloolefins (ROMP), as well as to various less common polymerization techniques. Polycondensation and non-chain polymerizations, including dendrimer synthesis and various "click" procedures, are covered in Volume 5. Volume 6 focuses on several aspects of controlled macromolecular architectures and soft nano-objects including hybrids and bioconjugates. Many of the achievements would have not been possible without new characterization techniques like AFM that allowed direct imaging of single molecules and nano-objects with a precision available only recently. An entirely new aspect in polymer science is based on the combination of bottom-up methods such as polymer synthesis and molecularly programmed self-assembly with top-down structuring such as lithography and surface templating, as presented in Volume 7. It encompasses polymer and nanoparticle assembly in bulk and under confined conditions or influenced by an external field, including thin films, inorganic-organic hybrids, or nanofibers. Volume 8 expands these concepts focusing on applications in advanced technologies, e.g. in electronic industry and centers on combination with top down approach and functional properties like conductivity. Another type of functionality that is of rapidly increasing importance in polymer science is introduced in volume 9. It deals with various aspects of polymers in biology and medicine, including the response of living cells and tissue to the contact with biofunctional particles and surfaces. The last volume is devoted to the scope and potential provided by environmentally benign and green polymers, as well as energy-related polymers. They discuss new technologies needed for a sustainable economy in our world of limited resources. Provides broad and in-depth coverage of all aspects of polymer science from synthesis/polymerization, properties, and characterization methods and techniques to nanostructures, sustainability and energy, and biomedical uses of polymers Provides a definitive source for those entering or researching in this area by integrating the multidisciplinary aspects of the science into one unique, up-to-date reference work Electronic version has complete cross-referencing and multi-media components Volume editors are world experts in their field (including a Nobel Prize winner)

Download or read book Single Molecule Studies of Branched Polymer Dynamics written by Danielle J. Mai and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Computational Studies Nanotechnology and Solution Thermodynamics of Polymer Systems written by Mark D. Dadmun and published by Springer Science & Business Media. This book was released on 2007-05-08 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text is the published version of many ofthe talks presented at two symposiums held as part of the Southeast Regional Meeting of the American Chemical Society (SERMACS) in Knoxville, TN in October, 1999. The Symposiums, entitled Solution Thermodynamics of Polymers and Computational Polymer Science and Nanotechnology, provided outlets to present and discuss problems of current interest to polymer scientists. It was, thus, decided to publish both proceedings in a single volume. The first part of this collection contains printed versions of six of the ten talks presented at the Symposium on Solution Thermodynamics of Polymers organized by Yuri B. Melnichenko and W. Alexander Van Hook. The two sessions, further described below, stimulated interesting and provocative discussions. Although not every author chose to contribute to the proceedings volume, the papers that are included faithfully represent the scope and quality of the symposium. The remaining two sections are based on the symposium on Computational Polymer Science and Nanotechnology organized by Mark D. Dadmun, Bobby G. Sumpter, and Don W. Noid. A diverse and distinguished group of polymer and materials scientists, biochemists, chemists and physicists met to discuss recent research in the broad field of computational polymer science and nanotechnology. The two-day oral session was also complemented by a number of poster presentations. The first article of this section is on the important subject of polymer blends. M. D.

Download or read book Investigating Polymer Physics with Single Molecule Experiment and Brownian Dynamics Simulation written by Charles Martin Schroeder and published by . This book was released on 2004 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Single Molecule Spectroscopy written by R. Rigler and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 375 pages. Available in PDF, EPUB and Kindle. Book excerpt: The topics range from single molecule experiments in quantum optics and solid-state physics to analogous investigations in physical chemistry and biophysics.

Download or read book Single Molecule Studies of Polymers and Self assembling Materials Effects of Chain Topology and Entanglements written by Yuecheng Peter Zhou and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Single Molecule Studies of Nucleic Acids and Their Proteins written by David Bensimon and published by Oxford University Press. This book was released on 2018-11-30 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides the basis for understanding the elastic properties of nucleic acids (DNA, RNA), the methods used to manipulate them (e.g. optical, magnetic and acoustic tweezers and traps), and how to observe their interactions with proteins (e.g. fluorescence microscopy, FCS, FRET, etc.). It then exemplifies the use of these various methods in the study of three families of DNA enzymes: polymerases, helicases and topoisomerases. The book aims not to be exhaustive, but rather to stimulate the imagination of readers in the application of these single molecule approaches to the study of DNA/RNA and their interactions.

Download or read book Fluorescence Studies of Polymer Containing Systems written by Karel Procházka and published by Springer. This book was released on 2016-02-03 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume describes the application of fluorescence spectroscopy in polymer research. The first chapters outline the basic principles of the conformational and dynamic behavior of polymers and review the problems of polymer self-assembly. Subsequent chapters introduce the theoretical principles of advanced fluorescence methods and typical examples of their application in polymer science. The book closes with several reviews of various fluorescence applications for studying specific aspects of polymer-solution behavior. It is a useful resource for polymer scientists and experts in fluorescence spectroscopy alike, facilitating their communication and cooperation.

Download or read book Polymers in Organic Electronics written by Sulaiman Khalifeh and published by Elsevier. This book was released on 2020-04-01 with total page 617 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymers in Organic Electronics: Polymer Selection for Electronic, Mechatronic, and Optoelectronic Systems provides readers with vital data, guidelines, and techniques for optimally designing organic electronic systems using novel polymers. The book classifies polymer families, types, complexes, composites, nanocomposites, compounds, and small molecules while also providing an introduction to the fundamental principles of polymers and electronics. Features information on concepts and optimized types of electronics and a classification system of electronic polymers, including piezoelectric and pyroelectric, optoelectronic, mechatronic, organic electronic complexes, and more. The book is designed to help readers select the optimized material for structuring their organic electronic system.Chapters discuss the most common properties of electronic polymers, methods of optimization, and polymeric-structured printed circuit boards. The polymeric structures of optoelectronics and photonics are covered and the book concludes with a chapter emphasizing the importance of polymeric structures for packaging of electronic devices. Provides key identifying details on a range of polymers, micro-polymers, nano-polymers, resins, hydrocarbons, and oligomers Covers the most common electrical, electronic, and optical properties of electronic polymers Describes the underlying theories on the mechanics of polymer conductivity Discusses polymeric structured printed circuit boards, including their rapid prototyping and optimizing their polymeric structures Shows optimization methods for both polymeric structures of organic active electronic components and organic passive electronic components

Download or read book LBL Research Review written by and published by . This book was released on 1987 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Encyclopedia of Polymer Science and Technology Concise written by Herman F. Mark and published by John Wiley & Sons. This book was released on 2013-10-16 with total page 1490 pages. Available in PDF, EPUB and Kindle. Book excerpt: The compact, affordable reference, revised and updated The Encyclopedia of Polymer Science and Technology, Concise Third Edition provides the key information from the complete, twelve-volume Mark's Encyclopedia in an affordable, condensed format. Completely revised and updated, this user-friendly desk reference offers quick access to all areas of polymer science, including important advances in nanotechnology, imaging and analytical techniques, controlled polymer architecture, biomimetics, and more, all in one volume. Like the twelve-volume full edition, the Encyclopedia of Polymer Science and Technology, Concise Third Edition provides both SI and common units, carefully selected key references for each article, and hundreds of tables, charts, figures, and graphs.