Dynamics of Molecular Excitons

Dynamics of Molecular Excitons
Author: Seogjoo Jang
Publsiher: Nanophotonics
Total Pages: 300
Release: 2020-06
ISBN: 0081023359
Category: Science
Language: EN, FR, DE, ES & NL

Dynamics of Molecular Excitons Book Excerpt:

Dynamics of Molecular Excitons provides a comprehensive, but concise description of major theories on the dynamics of molecular excitons, intended to serve as a self-contained resource on the topic. Designed to help those new to this area gain proficiency in this field, experts will also find the book useful in developing a deeper understanding of the subject. The starting point of the book is the standard microscopic definition of molecular Hamiltonians presented in commonly accepted modern quantum mechanical notations. Major assumptions and approximations involved in constructing Frenkel-type exciton Hamiltonians, which are well established, but are often hidden under arcane notations and approximations of old publications, are presented in detail. This will help quantum chemists understand the major assumptions involved in the definition of commonly used exciton models. Rate theories of exciton dynamics, such as Förster and Dexter theories and their modern generalizations, are presented in a unified and detailed manner. In addition, important aspects that are often neglected, such as local field effect and the role of fluctuating environments, are discussed. Various quantum dynamics methods allowing coherent dynamics of excitons are presented in a systematic manner in the context of quantum master equations or path integral formalisms. The author also provides a detailed theoretical explanation for the major spectroscopic techniques probing exciton dynamics, including modern two-dimensional electronic spectroscopy, with a critical assessment of the implications of these spectroscopic measurements. Finally, the book includes a brief overview of major applications including an explanation of organic photovoltaic materials and natural light harvesting complexes.

Exciton Dynamics in Molecular Crystals and Aggregates

Exciton Dynamics in Molecular Crystals and Aggregates
Author: Anonim
Publsiher: Springer
Total Pages: 228
Release: 2006-04-11
ISBN: 3540390685
Category: Science
Language: EN, FR, DE, ES & NL

Exciton Dynamics in Molecular Crystals and Aggregates Book Excerpt:

Formation and Dynamics of Molecular Excitons and Their Fingerprints in Nonlinear Optical Spectroscopy

Formation and Dynamics of Molecular Excitons and Their Fingerprints in Nonlinear Optical Spectroscopy
Author: Pär Kjellberg
Publsiher: Unknown
Total Pages: 45
Release: 2006
ISBN: 9789174221138
Category: Electronic Book
Language: EN, FR, DE, ES & NL

Formation and Dynamics of Molecular Excitons and Their Fingerprints in Nonlinear Optical Spectroscopy Book Excerpt:

Electronic Excitations in Organic Based Nanostructures

Electronic Excitations in Organic Based Nanostructures
Author: Anonim
Publsiher: Elsevier
Total Pages: 508
Release: 2003-11-13
ISBN: 9780080519210
Category: Technology & Engineering
Language: EN, FR, DE, ES & NL

Electronic Excitations in Organic Based Nanostructures Book Excerpt:

The first book devoted to a systematic consideration of electronic excitations and electronic energy transfer in organic crystalline multilayers and organics based nanostructures(quantum wells, quantum wires, quantum dots, microcavities). The ingenious combination of organic with inorganic materials in one and the same hybrid structure is shown to give qualitatively new opto-electronic phenomena, potentially important for applications in nonlinear optics, light emitting devices, photovoltaic cells, lasers and so on. The book will be useful not only for physicists but also for chemists and biologists.To help the nonspecialist reader, three Chapters which contain a tutorial and updated introduction to the physics of electronic excitations in organic and inorganic solids have been included. * hybrid Frenkel-Wannier-Mott excitons * microcavities with crystalline and disordered organics * electronic excitation at donor-acceptor interfaces * cold photoconductivity at donor-acceptor interface * cummulative photovoltage * Feorster transfer energy in microcavity * New concepts for LEDs

Biophysical Chemistry

Biophysical Chemistry
Author: Robin Leatherbarrow,R H Templer
Publsiher: Royal Society of Chemistry
Total Pages: 290
Release: 2007-10-31
ISBN: 1847550258
Category: Science
Language: EN, FR, DE, ES & NL

Biophysical Chemistry Book Excerpt:

In the post-genomic world, advances in the comprehension of cell behaviour will depend upon scientists deciphering the molecular basis of interactions between proteins and membranes. Bringing together contributions from chemists, biologists and physicists, Biophysical Chemistry: Membranes and Proteins demonstrates how multidisciplinary teams can gain insights into understanding complex biological systems. This book reflects both the scope and the interdisciplinary nature of the field, with topics including: modelling of biological systems; membrane structure and interactions; probing biomolecules; and channels and receptors. Full of stimulating articles and opinions, readers from academia and industry will welcome the wide range of coverage and the state-of-the-art science.

Primary Photoexcitations in Conjugated Polymers Molecular Exciton Versus Semiconductor Band Model

Primary Photoexcitations in Conjugated Polymers  Molecular Exciton Versus Semiconductor Band Model
Author: Niyasi Serdar Sariciftci
Publsiher: World Scientific
Total Pages: 640
Release: 1998-01-02
ISBN: 9814518212
Category: Science
Language: EN, FR, DE, ES & NL

Primary Photoexcitations in Conjugated Polymers Molecular Exciton Versus Semiconductor Band Model Book Excerpt:

This volume concentrates on the controversy within the scientific community over how to explain, understand and describe the photophysics/photochemistry of this class of materials. This controvery is of such a fundamental nature that the solution of the problem might be in a unification of the semiconductor and metal physics with the molecular quantum chemistry. Thus, a wide-ranging and comprehensive discussion of this very crucial issue has not been written down yet. This volume brings together the most prominent scientists specializing in this controversial topic. Each contributor addresses the opponents' arguments. After short introductory chapters, the contributors discuss their own speciality area and compare the results with both models and explain their position on why one of the models is more appropriate. Special emphasis is given to comparative discussions with other conjugated molecular systems as well as inorganic semiconductors. Contents:Correlations in Conjugated Polymers (Z G Soos et al.)Nature of the Primary Photo-Excitations in Poly(Arylene-Vinylenes): Bound Neutral Excitons or Charged Polaron Pairs (A J Heeger)Excitons in Conjugated Polymers (H Bässler)Intramolecular Excitons and Intermolecular Polaron Pairs as Primary Photoexcitations in Conjugated Polymers (E Conwell)Excitonic Effects in the Linear and Nonlinear Optical Properties of Conjugated Polymers (S Abe)Bound Polaron Pair Formation in Poly(Phenylenevinylenes) (L Rothberg)Luminescence Efficiency and Time-Dependence: Insights into the Nature of the Emitting Species in Conjugated Polymers (I D W Samuel et al.)Mechanism of Carrier Generation in the Class of Low Mobility Materials: Transient Photoconductivity and Photoluminescence at High Electric Fields (D Moses)Photoluminescence Spectroscopy as a Probe for Disorder and Excitonic Effects in Organic and Inorganic Semiconductors (U Lemmer & E O Göbel)Spectroscopy on Conjugated Polymer Devices (V Dyakonov)Spin-Dependent Recombination Processes in π-Conjugated Polymers (P A Lane et al.)Electroabsorption Spectroscopy on π-Conjugated Polymers (G Weiser & Á Horváth)The Role of Excitons in Charge Carrier Production in Polysilanes (R G Kepler & Z G Soos)Theory of Excitons and Biexcitons in π-Conjugated Polymers (S Mazumdar & M Chandross)Ultrafast Relaxation in Conjugated Polymers (T Kobayashi)Are Bipolarons Photogenerated in PPV? (E Conwell)Do Bipolarons Exist in Doped or Photoirradiated Conjugated Polymers? — An Analysis Based on Studies of Model Compounds (Y Furukawa)Photoexcitations in Conjugated Oligomers (R A J Janssen)Excited States in Poly(Paraphenylenevinylene) and Related Oligomers: Theoretical Investigation of Their Relation to Electrical and Optical Properties (D Beljonne et al.)Ultrafast Photoinduced Absorption in Nondegenerate Ground-State Conjugated Polymers: Signatures of Excited States (D W McBranch & M B Sinclair) Readership: Researchers and graduate students in the field of physics and chemistry of conjugated, conducting polymers and physical chemistry. keywords:

Energy Transfer Processes in Condensed Matter

Energy Transfer Processes in Condensed Matter
Author: Baldassare Dibartolo
Publsiher: Springer Science & Business Media
Total Pages: 696
Release: 2012-12-06
ISBN: 1461324076
Category: Science
Language: EN, FR, DE, ES & NL

Energy Transfer Processes in Condensed Matter Book Excerpt:

This book presents an account of the NATO Advanced Study Institute on "Energy Transfer Processes in Condensed Matter", held in Erice, Italy, from June 16 to June 30, 1983. This meeting was organized by the International School of Atomic and Molecular Spectroscopy of the "Ettore Majorana" Centre for Scientific Culture. The objective of the Institute was to present a comprehensive treatment of the basic mechanisms by which electronic excitation energy, initially localized in a particular constituent or region of a condensed material, transfers itself to the other parts of the system. Energy transfer processes are important to such varied .fields as spectroscopy, lasers, phosphor technology, artificial solar energy conversion, and photobiology. This meeting was the first encounter of this sort entirely dedicated to this important topic. A total of 65 participants came from 47 laboratories and 16 nations (Belgium, Czechoslovakia, F.R. of Germany, France, Greece, India, Ireland, Israel, Italy, The Netherlands, Poland, Portugal, Switzerland, Turkey, United Kingdom, and the United States of A America). The secretaries of the course were: Ms. Aliki Karipidou for the scientific aspects and Mr. Massimo Minella for the admini strative aspects of the meeting.

Excitonic Processes in Solids

Excitonic Processes in Solids
Author: Masayasu Ueta,Hiroshi Kanzaki,Koichi Kobayashi,Yutaka Toyozawa,Eiichi Hanamura
Publsiher: Springer Science & Business Media
Total Pages: 530
Release: 2012-12-06
ISBN: 3642826024
Category: Science
Language: EN, FR, DE, ES & NL

Excitonic Processes in Solids Book Excerpt:

An exciton is an electronic excitation wave consisting of an electron-hole pair which propagates in a nonmetallic solid. Since the pioneering research of Fren kel, Wannier and the Pohl group in the 1930s, a large number of experimental and theoretical studies have been made. Due to these investigations the exciton is now a well-established concept and the electronic structure has been clarified in great detail. The next subjects for investigation are, naturally, dynamical processes of excitons such as excitation, relaxation, annihilation and molecule formation and, in fact, many interesting phenomena have been disclosed by recent works. These excitonic processes have been recognized to be quite important in solid-state physics because they involve a number of basic interactions between excitons and other elementary excitations. It is the aim of this quasi monograph to describe these excitonic processes from both theoretical and experimental points of view. we take a few To discuss and illustrate the excitonic processes in solids, important and well-investigated insulating crystals as playgrounds for excitons on which they play in a manner characteristic of each material. The selection of the materials is made in such a way that they possess some unique properties of excitonic processes and are adequate to cover important interactions in which excitons are involved. In each material, excitonic processes are described in detail from the experimental side in order to show the whole story of excitons in a particular material.

Disorder Effects on Relaxational Processes

Disorder Effects on Relaxational Processes
Author: Ranko Richert,Alexander Blumen
Publsiher: Springer Science & Business Media
Total Pages: 754
Release: 2012-12-06
ISBN: 364278576X
Category: Science
Language: EN, FR, DE, ES & NL

Disorder Effects on Relaxational Processes Book Excerpt:

The field of non-crystalline materials has seen the emergence of many challeng ing problems during its long history. In recent years, the interest in polymeric and biological disordered matter has stimulated new activities which in turn have enlarged the organic and inorganic glass community. The current research fields and recent progress have extended our knowledge of the rich phenomenol ogy of glassy systems, where the role of disorder is fundamental for the underlying microscopic dynamics. In addition, despite the lack of a unified theory, many interesting theoretical models have recently evolved. The present volume offers the reader a collection of topics representing the current state in the understanding of disorder effects as well as a survey of the basic problems and phenomena involved. The task of compiling a book devoted to disordered systems has benefited much from a seminar organized by the W.-E. Heraeus Foundation in Bad Honnef in April 1992, where we had the opportunity to discuss the project with most of the authors. Here we wish to thank the Heraeus Foundation for their support, and the authors and Springer-Verlag, especially Dr. Marion Hertel, for the pleasant cooperation.

Molecular Interactions

Molecular Interactions
Author: David A. Micha
Publsiher: John Wiley & Sons
Total Pages: 400
Release: 2020-01-02
ISBN: 0470290749
Category: Science
Language: EN, FR, DE, ES & NL

Molecular Interactions Book Excerpt:

A modern, comprehensive text and reference describing intermolecular forces, this book begins with coverage of the concepts and methods for simpler systems, then moves on to more advanced subjects for complex systems – emphasizing concepts and methods used in calculations with realistic models and compared with empirical data. Contains applications to many physical systems and worked examples Proceeds from introductory material to advanced modern treatments Has relevance for new materials, biological phenomena, and energy and fuels production

The Physics of Solar Energy Conversion

The Physics of Solar Energy Conversion
Author: Juan Bisquert
Publsiher: CRC Press
Total Pages: 470
Release: 2020-06-09
ISBN: 0429000146
Category: Science
Language: EN, FR, DE, ES & NL

The Physics of Solar Energy Conversion Book Excerpt:

Research on advanced energy conversion devices such as solar cells has intensified in the last two decades. A broad landscape of candidate materials and devices were discovered and systematically studied for effective solar energy conversion and utilization. New concepts have emerged forming a rather powerful picture embracing the mechanisms and limitation to efficiencies of different types of devices. The Physics of Solar Energy Conversion introduces the main physico-chemical principles that govern the operation of energy devices for energy conversion and storage, with a detailed view of the principles of solar energy conversion using advanced materials. Key Features include: Highlights recent rapid advances with the discovery of perovskite solar cells and their development. Analyzes the properties of organic solar cells, lithium ion batteries, light emitting diodes and the semiconductor materials for hydrogen production by water splitting. Embraces concepts from nanostructured and highly disordered materials to lead halide perovskite solar cells Takes a broad perspective and comprehensively addresses the fundamentals so that the reader can apply these and assess future developments and technologies in the field. Introduces basic techniques and methods for understanding the materials and interfaces that compose operative energy devices such as solar cells and solar fuel converters.

Introduction to Fluorescence Sensing

Introduction to Fluorescence Sensing
Author: Alexander P. Demchenko
Publsiher: Springer Nature
Total Pages: 657
Release: 2020-12-01
ISBN: 3030601552
Category: Medical
Language: EN, FR, DE, ES & NL

Introduction to Fluorescence Sensing Book Excerpt:

This book provides systematic knowledge of basic principles in the design of fluorescence sensing and imaging techniques together with critical analysis of recent developments. Fluorescence is the most popular technique in chemical and biological sensing because of its ultimate sensitivity, high temporal and spatial resolution and versatility that enables imaging within the living cells. It develops rapidly in the directions of constructing new molecular recognition units, new fluorescence reporters and in improving sensitivity of response up to detection of single molecules. Its application areas range from control of industrial processes to environment monitoring and clinical diagnostics. Being a guide for students and young researchers, it also addresses professionals involved in active basic and applied research. Making a strong link between education, research and product development, this book discusses prospects for future progress.

Future Directions of Nonlinear Dynamics in Physical and Biological Systems

Future Directions of Nonlinear Dynamics in Physical and Biological Systems
Author: P.L. Christiansen,J.C. Eilbeck,R.D. Parmentier
Publsiher: Springer Science & Business Media
Total Pages: 557
Release: 2013-11-11
ISBN: 1489916091
Category: Science
Language: EN, FR, DE, ES & NL

Future Directions of Nonlinear Dynamics in Physical and Biological Systems Book Excerpt:

Early in 1990 a scientific committee was formed for the purpose of organizing a high-level scientific meeting on Future Directions of Nonlinear Dynamics in Physical and Biological Systems, in honor of Alwyn Scott's 60th birthday (December 25, 1991). As preparations for the meeting proceeded, they were met with an unusually broad-scale and high level of enthusiasm on the part of the international nonlinear science community, resulting in a participation by 168 scientists from 23 different countries in the conference, which was held July 23 to August 11992 at the Laboratory of Applied Mathematical Physics and the Center for Modelling, Nonlinear Dynamics and Irreversible Thermodynamics (MIDIT) of the Technical University of Denmark. During the meeting about 50 lectures and 100 posters were presented in 9 working days. The contributions to this present volume have been grouped into the following chapters: 1. Integrability, Solitons, and Coherent Structures 2. Nonlinear Evolution Equations and Diffusive Systems 3. Chaotic and Stochastic Dynamics 4. Classical and Quantum Lattices and Fields 5. Superconductivity and Superconducting Devices 6. Nonlinear Optics 7. Davydov Solitons and Biomolecular Dynamics 8. Biological Systems and Neurophysics. AI Scott has made early and fundamental contributions to many of these different areas of nonlinear science. They form an important subset of the total number of the papers and posters presented at the meeting. Other papers from the meeting are being published in a special issue of Physica D Nonlinear Phenomena.

Physics in One Dimension

Physics in One Dimension
Author: J. Bernasconi,T. Schneider
Publsiher: Springer Science & Business Media
Total Pages: 370
Release: 2012-12-06
ISBN: 3642815928
Category: Science
Language: EN, FR, DE, ES & NL

Physics in One Dimension Book Excerpt:

In 1966, E.H. Lieb and D.C. r1attis published a book on "Mathematical Physics in One Dimension" [Academic Press, New York and London] which is much more than just a collection of reprints and which in fact marked the beginnings of the rapidly growing interest in one-dimensional problems and materials in the 1970's. In their Foreword, Lieb and r~attis made the observation that " ... there now exists a vast literature on this subject, albeit one which is not indexed under the topic "one dimension" in standard indexing journals and which is therefore hard to research ... ". Today, the situation is even worse, and we hope that these Proceedings will be a valuable guide to some of the main current areas of one-dimensional physics. From a theoretical point of view, one-dimensional problems have always been very attractive. Many non-trivial models are soluble in one dimension, while they are only approximately understood in three dimensions. Therefore, the corresponding exact solutions serve as a useful test of approximate ma thematical methods, and certain features of the one-dimensional solution re main relevant in higher dimensions. On the other hand, many important phe nomena are strongly enhanced, and many concepts show up especially clearly in one-dimensional or quasi -one-dimensional systems. Among them are the ef fects of fluctuations, of randomness, and of nonlinearity; a number of in teresting consequences are specific to one dimension.

The Physics of Solar Cells

The Physics of Solar Cells
Author: Juan Bisquert
Publsiher: CRC Press
Total Pages: 226
Release: 2017-11-15
ISBN: 1351395580
Category: Science
Language: EN, FR, DE, ES & NL

The Physics of Solar Cells Book Excerpt:

The book provides an explanation of the operation of photovoltaic devices from a broad perspective that embraces a variety of materials concepts, from nanostructured and highly disordered organic materials, to highly efficient devices such as the lead halide perovskite solar cells. The book establishes from the beginning a simple but very rich model of a solar cell, in order to develop and understand step by step the photovoltaic operation according to fundamental physical properties and constraints. It emphasizes the aspects pertaining to the functioning of a solar cell and the determination of limiting efficiencies of energy conversion. The final chapters of the book establish a more refined and realistic treatment of the many factors that determine the actual performance of experimental devices: transport gradients, interfacial recombination, optical losses and so forth. The book finishes with a short review of additional important aspects of solar energy conversion, such as the photonic aspects of spectral modification, and the direct conversion of solar photons to chemical fuel via electrochemical reactions.

Advances in Chemical Physics

Advances in Chemical Physics
Author: Ilya Prigogine,Stuart A. Rice
Publsiher: John Wiley & Sons
Total Pages: 433
Release: 2009-09-09
ISBN: 0470141980
Category: Science
Language: EN, FR, DE, ES & NL

Advances in Chemical Physics Book Excerpt:

The Advances in Chemical Physics series provides the chemical physics and physical chemistry fields with a forum for critical, authoritative evaluations of advances in every area of the discipline. Filled with cutting-edge research reported in a cohesive manner not found elsewhere in the literature, each volume of the Advances in Chemical Physics series serves as the perfect supplement to any advanced graduate class devoted to the study of chemical physics.

Dynamics at Solid State Surfaces and Interfaces

Dynamics at Solid State Surfaces and Interfaces
Author: Uwe Bovensiepen,Hrvoje Petek,Martin Wolf
Publsiher: John Wiley & Sons
Total Pages: 272
Release: 2012-04-16
ISBN: 3527646485
Category: Science
Language: EN, FR, DE, ES & NL

Dynamics at Solid State Surfaces and Interfaces Book Excerpt:

This two-volume work covers ultrafast structural and electronic dynamics of elementary processes at solid surfaces and interfaces, presenting the current status of photoinduced processes. Providing valuable introductory information for newcomers to this booming field of research, it investigates concepts and experiments, femtosecond and attosecond time-resolved methods, as well as frequency domain techniques. The whole is rounded off by a look at future developments.

DNA Photodamage

DNA Photodamage
Author: Roberto Improta,Thierry Douki
Publsiher: Royal Society of Chemistry
Total Pages: 346
Release: 2021-12-22
ISBN: 1839161965
Category: Medical
Language: EN, FR, DE, ES & NL

DNA Photodamage Book Excerpt:

Written in an accessible and comprehensive manner, DNA Photodamage will appeal to all scientists working in the area whether specialists in the discipline or not and provides a complete coverage of the field, from ultrafast spectroscopy to biomedical research.

Discoveries in Photosynthesis

Discoveries in Photosynthesis
Author: Govindjee,J.T. Beatty,H. Gest,J.F. Allen
Publsiher: Springer Science & Business Media
Total Pages: 1304
Release: 2006-07-15
ISBN: 1402033249
Category: Science
Language: EN, FR, DE, ES & NL

Discoveries in Photosynthesis Book Excerpt:

"Life Is Bottled Sunshine" [Wynwood Reade, Martyrdom of Man, 1924]. This inspired phrase is a four-word summary of the significance of photosynthesis for life on earth. The study of photosynthesis has attracted the attention of a legion of biologists, biochemists, chemists and physicists for over 200 years. Discoveries in Photosynthesis presents a sweeping overview of the history of photosynthesis investigations, and detailed accounts of research progress in all aspects of the most complex bioenergetic process in living organisms. Conceived of as a way of summarizing the history of research advances in photosynthesis as of millennium 2000, the book evolved into a majestic and encyclopedic saga involving all of the basic sciences. The book contains 111 papers, authored by 132 scientists from 19 countries. It includes overviews; timelines; tributes; minireviews on excitation energy transfer, reaction centers, oxygen evolution, light-harvesting and pigment-protein complexes, electron transport and ATP synthesis, techniques and applications, biogenesis and membrane architecture, reductive and assimilatory processes, transport, regulation and adaptation, Genetics, and Evolution; laboratories and national perspectives; and retrospectives that end in a list of photosynthesis symposia, books and conferences. Informal and formal photographs of scientists make it a wonderful book to have. This book is meant not only for the researchers and graduate students, but also for advanced undergraduates in Plant Biology, Microbiology, Cell Biology, Biochemistry, Biophysics and History of Science.

Ultrafast Phenomena XV

Ultrafast Phenomena XV
Author: Paul Corkum,David M. Jonas,Dwayne R. Miller,Andrew M. Weiner
Publsiher: Springer Science & Business Media
Total Pages: 842
Release: 2007-07-10
ISBN: 3540687793
Category: Science
Language: EN, FR, DE, ES & NL

Ultrafast Phenomena XV Book Excerpt:

This book summarizes the results presented at the 15th International Conference on Ultrafast Phenomena and provides an up-to-date view of this important field. It presents the latest advances in ultrafast science, including both ultrafast optical technology and the study of ultrafast phenomena. It covers picosecond, femtosecond, and attosecond processes relevant to applications in physics, chemistry, biology, and engineering.