Download or read book Vibronic Coherence in Light harvesting Proteins and Semiconductor Nanomaterials written by Ryan Tilluck and published by . This book was released on 2020 with total page 187 pages. Available in PDF, EPUB and Kindle. Book excerpt: Light harvesting in photosynthetic organisms employ complex arrays of highly ordered chromophores in proteins for the capture and transfer of energy from solar photons. The structural design of the light harvesting proteins leads to extensive delocalization across many molecules of the system. Recent studies demonstrate the involvement of quantum coherence in extraordinarily fast energy transfer pathways in photosynthetic light harvesting proteins. The extent of delocalization may also form vibronic excitons, vibronic excitons, arising from quantum coherent mixing of vibrations with the extensively delocalized electronic states. Vibronic excitons can greatly enhance the excitation energy transfer within light harvesting systems. In this dissertation, the detection and role of quantum coherence in the peridinin-chlorophyll protein (PCP), a mid-visible peripheral light-harvesting protein in marine dinoflagellates that delivers excitation energy to photosystem II, will be discussed. This dissertation will also discuss the role of vibronic coherences, involving organic surface ligands, in the hot carrier cooling process of CdSe semiconductor quantum dots (QDs). Optical broadband two-dimensional electronic spectroscopy (2DES) with ultrashort pulses has been employed on these systems to characterize nonradiative decay and energy transfer pathways in PCP and CdSe QDs. Understanding the advantage gained by the organism through the use of coherent energy transfer mechanisms may enable the development of more efficient light harvesting materials for use in photovoltaic cells or in photocatalysis.
Download or read book Light Harvesting in Photosynthesis written by Roberta Croce and published by CRC Press. This book was released on 2018-01-12 with total page 793 pages. Available in PDF, EPUB and Kindle. Book excerpt: This landmark collective work introduces the physical, chemical, and biological principles underlying photosynthesis: light absorption, excitation energy transfer, and charge separation. It begins with an introduction to properties of various pigments, and the pigment proteins in plant, algae, and bacterial systems. It addresses the underlying physics of light harvesting and key spectroscopic methods, including data analysis. It discusses assembly of the natural system, its energy transfer properties, and regulatory mechanisms. It also addresses light-harvesting in artificial systems and the impact of photosynthesis on our environment. The chapter authors are amongst the field’s world recognized experts. Chapters are divided into five main parts, the first focused on pigments, their properties and biosynthesis, and the second section looking at photosynthetic proteins, including light harvesting in higher plants, algae, cyanobacteria, and green bacteria. The third part turns to energy transfer and electron transport, discussing modeling approaches, quantum aspects, photoinduced electron transfer, and redox potential modulation, followed by a section on experimental spectroscopy in light harvesting research. The concluding final section includes chapters on artificial photosynthesis, with topics such as use of cyanobacteria and algae for sustainable energy production. Robert Croce is Head of the Biophysics Group and full professor in biophysics of photosynthesis/energy at Vrije Universiteit, Amsterdam. Rienk van Grondelle is full professor at Vrije Universiteit, Amsterdam. Herbert van Amerongen is full professor of biophysics in the Department of Agrotechnology and Food Sciences at Wageningen University, where he is also director of the MicroSpectroscopy Research Facility. Ivo van Stokkum is associate professor in the Department of Physics and Astronomy, Faculty of Sciences, at Vrije Universiteit, Amsterdam.
Download or read book Multidimensional Time Resolved Spectroscopy written by Tiago Buckup and published by Springer. This book was released on 2018-12-07 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: The series Topics in Current Chemistry Collections presents critical reviews from the journal Topics in Current Chemistry organized in topical volumes. The scope of coverage is all areas of chemical science including the interfaces with related disciplines such as biology, medicine and materials science. The goal of each thematic volume is to give the non-specialist reader, whether in academia or industry, a comprehensive insight into an area where new research is emerging which is of interest to a larger scientific audience. Each review within the volume critically surveys one aspect of that topic and places it within the context of the volume as a whole. The most significant developments of the last 5 to 10 years are presented using selected examples to illustrate the principles discussed. The coverage is not intended to be an exhaustive summary of the field or include large quantities of data, but should rather be conceptual, concentrating on the methodological thinking that will allow the non-specialist reader to understand the information presented. Contributions also offer an outlook on potential future developments in the field.
Download or read book Optics in Our Time written by Mohammad D. Al-Amri and published by Springer. This book was released on 2016-12-12 with total page 509 pages. Available in PDF, EPUB and Kindle. Book excerpt: Light and light based technologies have played an important role in transforming our lives via scientific contributions spanned over thousands of years. In this book we present a vast collection of articles on various aspects of light and its applications in the contemporary world at a popular or semi-popular level. These articles are written by the world authorities in their respective fields. This is therefore a rare volume where the world experts have come together to present the developments in this most important field of science in an almost pedagogical manner. This volume covers five aspects related to light. The first presents two articles, one on the history of the nature of light, and the other on the scientific achievements of Ibn-Haitham (Alhazen), who is broadly considered the father of modern optics. These are then followed by an article on ultrafast phenomena and the invisible world. The third part includes papers on specific sources of light, the discoveries of which have revolutionized optical technologies in our lifetime. They discuss the nature and the characteristics of lasers, Solid-state lighting based on the Light Emitting Diode (LED) technology, and finally modern electron optics and its relationship to the Muslim golden age in science. The book’s fourth part discusses various applications of optics and light in today's world, including biophotonics, art, optical communication, nanotechnology, the eye as an optical instrument, remote sensing, and optics in medicine. In turn, the last part focuses on quantum optics, a modern field that grew out of the interaction of light and matter. Topics addressed include atom optics, slow, stored and stationary light, optical tests of the foundation of physics, quantum mechanical properties of light fields carrying orbital angular momentum, quantum communication, and Wave-Particle dualism in action.
Download or read book Growth And Characterization Of Semiconductor Nanostructure For Device Applications written by Dr. Jehova Jire L. Hmar and published by BFC Publications. This book was released on 2023-03-04 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is intended to provide knowledge for students and learners in the field of nanoscale science and nanotechnology. Nanotechnology is design, fabrication and application of nanostructures or nanomaterials, and the fundamental understanding of the relationships between physical properties or phenomena and material dimensions. Nanotechnology deals with materials or structures in nanometer scales, typically ranging from subnanometers to several hundred nanometers. Nanotechnology is a new field or a new scientific domain. Similar to quantum mechanics, on nanometer scale, materials or structures may possess new physical properties or exhibit new physical phenomena. Nanotechnology has an extremely broad range of potential applications from nanoscale electronics and optics and therefore it requires formation of and contribution from multidisciplinary teams of physicists, chemists, materials scientists and engineers. The aim of this book “Growth and Characterization of Semiconductor Nanostructure for Device Applications” is to summarize the fundamentals and established techniques of synthesis, fabrication, characterization and applications of nanomaterials and nanostructures so as to provide readers a systematic and coherent picture about synthesis, fabrication and characterization of nanomaterials.
Download or read book Photosynthetic Excitons written by Herbert van Amerongen and published by World Scientific. This book was released on 2000 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excitons are considered as the basic concept used by describing the spectral properties of photosynthetic pigment-protein complexes and excitation dynamics in photosynthetic light-harvesting antenna and reaction centers. Following the recently obtained structures of a variety of photosynthetic pigment-protein complexes from plants and bacteria our interest in understanding the relation between structure, function and spectroscopy has strongly increased. These data demonstrate a short interpigment distance (of the order of 1 nm or even smaller) and/or a highly symmetric (ring-like) arrangement of pigment molecules in peripheral light-harvesting complexes of photosynthetic bacteria. Books which were devoted to the exciton problem so far mainly considered the spectral properties of molecular crystals. However, the small size of these pigment aggregates in the pigment-protein complexes as well as the role of the protein, which is responsible for the structural arrangement of the complex, clearly will have a dramatic influence on the pigment spectra and exciton dynamics. All these aspects of the problem are considered in this book. Exciton theory is mainly considered for small molecular aggregates (dimers, ring-like structures etc.). Together with the theoretical description of the classical conceptual approach, which mainly deals with polarization properties of the absorption and fluorescence spectra, the nonlinear femtosecond spectroscopy which is widely used for investigations now is also discussed. A large part of the book demonstrates the excitonic effects in a multitude of photosynthetic pigment-protein complexes and how we can understand these properties on the basis of the exciton concept.
Download or read book Coherent Vibrational Dynamics written by Guglielmo Lanzani and published by CRC Press. This book was released on 2007-11-29 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: Remarkable developments in the spectroscopy field regarding ultrashort pulse generation have led to the possibility of producing light pulses ranging from 50 to5 fs and frequency tunable from the near infrared to the ultraviolet range. Such pulses enable us to follow the coupling of vibrational motion to the electronic transitions in molecules and
Download or read book Light Harvesting Antennas in Photosynthesis written by B.R. Green and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 533 pages. Available in PDF, EPUB and Kindle. Book excerpt: Light-Harvesting Antennas in Photosynthesis is concerned with the most important process on earth - the harvesting of light energy by photosynthetic organisms. This book provides a comprehensive treatment of all aspects of photosynthetic light-harvesting antennas, from the biophysical mechanisms of light absorption and energy transfer to the structure, biosynthesis and regulation of antenna systems in whole organisms. It sets the great variety of antenna pigment-protein complexes in their evolutionary context and at the same time brings in the latest hi-tech developments. The book is unique in the degree to which it emphasizes the integration of molecular biological, biochemical and biophysical approaches. Overall, a well-organized, understandable, and comprehensive volume. It will be a valuable resource for both graduate students and their professors, and a helpful library reference book for undergraduates.
Download or read book Coherent Raman Scattering Microscopy written by Ji-Xin Cheng and published by CRC Press. This book was released on 2016-04-19 with total page 603 pages. Available in PDF, EPUB and Kindle. Book excerpt: The First Book on CRS MicroscopyCompared to conventional Raman microscopy, coherent Raman scattering (CRS) allows label-free imaging of living cells and tissues at video rate by enhancing the weak Raman signal through nonlinear excitation. Edited by pioneers in the field and with contributions from a distinguished team of experts, Coherent Raman Sc
Download or read book Conical Intersections written by Wolfgang Domcke and published by World Scientific. This book was released on 2011 with total page 769 pages. Available in PDF, EPUB and Kindle. Book excerpt: The concept of adiabatic electronic potential-energy surfaces, defined by the Born?Oppenheimer approximation, is fundamental to our thinking about chemical processes. Recent computational as well as experimental studies have produced ample evidence that the so-called conical intersections of electronic energy surfaces, predicted by von Neumann and Wigner in 1929, are the rule rather than the exception in polyatomic molecules. It is nowadays increasingly recognized that conical intersections play a key mechanistic role in chemical reaction dynamics. This volume provides an up-to-date overview of the multi-faceted research on the role of conical intersections in photochemistry and photobiology, including basic theoretical concepts, novel computational strategies as well as innovative experiments. The contents and discussions will be of value to advanced students and researchers in photochemistry, molecular spectroscopy and related areas.
Download or read book Handbook of Solid State Lasers written by B Denker and published by Elsevier. This book was released on 2013-02-20 with total page 688 pages. Available in PDF, EPUB and Kindle. Book excerpt: Solid-state lasers which offer multiple desirable qualities, including enhanced reliability, robustness, efficiency and wavelength diversity, are absolutely indispensable for many applications. The Handbook of solid-state lasers reviews the key materials, processes and applications of solid-state lasers across a wide range of fields.Part one begins by reviewing solid-state laser materials. Fluoride laser crystals, oxide laser ceramics, crystals and fluoride laser ceramics doped by rare earth and transition metal ions are discussed alongside neodymium, erbium and ytterbium laser glasses, and nonlinear crystals for solid-state lasers. Part two then goes on to explore solid-state laser systems and their applications, beginning with a discussion of the principles, powering and operation regimes for solid-state lasers. The use of neodymium-doped materials is considered, followed by system sizing issues with diode-pumped quasi-three level materials, erbium glass lasers, and microchip, fiber, Raman and cryogenic lasers. Laser mid-infrared systems, laser induced breakdown spectroscope and the clinical applications of surgical solid-state lasers are also explored. The use of solid-state lasers in defense programs is then reviewed, before the book concludes by presenting some environmental applications of solid-state lasers.With its distinguished editors and international team of expert contributors, the Handbook of solid-state lasers is an authoritative guide for all those involved in the design and application of this technology, including laser and materials scientists and engineers, medical and military professionals, environmental researchers, and academics working in this field. Reviews the materials used in solid-state lasers Explores the principles of solid-state laser systems and their applications Considers defence and environmental applications
Download or read book Femtochemistry VII written by Michele Kimble and published by Elsevier. This book was released on 2006-10-03 with total page 611 pages. Available in PDF, EPUB and Kindle. Book excerpt: Femtochemistry VII presents the most recent developments in femtochemistry and highlights the significance of the field today. This book contains extracts from the proceedings, presentations and posters from the Femtochemistry VII conference, held in Washington D.C., on July 17-22, 2005. The stimulating conference was opened by Professor Ahmed Zewail (1999 Nobel Prize Winner), and as was evident by the attendees at the conference, had a very active program with the presentation of numerous talks and a large number of posters. This collection of papers reflects the remarkable progress that has been made in femtosecond spectroscopy, and especially to its emergence as a field of research devoted to chemistry and biology, giving rise to femtochemistry and femtobiology. Subjects covered include imaging, structural dynamics, and spectroscopies, fundamentals of reaction dynamics, salvation phenomenta, liquids and interfaces, aggregates/particles/surfaces, protein dynamics and photobiology, quantum control, and intense laser-matter interactions. Subjects covered by this book include imaging, structural dynamics, and spectroscopies; fundamentals of reaction dynamics; salvation phenomenta; liquids and interfaces; aggregates/particles/surfaces; protein dynamics and photobiology; quantum control; and intense laser-matter interactions. This book would appeal to chemists, physicists and biologists in the fields of atomic and molecular science. * Contains the most recent developments in Femtochemistry from the Femtochemistry VII conference* Highlights the significance of femtochemistry today* Displays extracts from the proceedings, presentations and posters from the conference
Download or read book Quantum Tunnelling in Enzyme catalysed Reactions written by Rudolf K. Allemann and published by Royal Society of Chemistry. This book was released on 2009 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years, there has been an explosion in knowledge and research associated with the field of enzyme catalysis and H-tunneling. Rich in its breath and depth, this introduction to modern theories and methods of study is suitable for experienced researchers those new to the subject. Edited by two leading experts, and bringing together the foremost practitioners in the field, this up-to-date account of a rapidly developing field sits at the interface between biology, chemistry and physics. It covers computational, kinetic and structural analysis of tunnelling and the synergy in combining these methods (with a major focus on H-tunneling reactions in enzyme systems). The book starts with a brief overview of proton and electron transfer history by Nobel Laureate, Rudolph A. Marcus. The reader is then guided through chapters covering almost every aspect of reactions in enzyme catalysis ranging from descriptions of the relevant quantum theory and quantum/classical theoretical methodology to the description of experimental results. The theoretical interpretation of these large systems includes both quantum mechanical and statistical mechanical computations, as well as simple more approximate models. Most of the chapters focus on enzymatic catalysis of hydride, proton and H" transfer, an example of the latter being proton coupled electron transfer. There is also a chapter on electron transfer in proteins. This is timely since the theoretical framework developed fifty years ago for treating electron transfers has now been adapted to H-transfers and electron transfers in proteins. Accessible in style, this book is suitable for a wide audience but will be particularly useful to advanced level undergraduates, postgraduates and early postdoctoral workers.
Download or read book Optical Antennas written by Mario Agio and published by Cambridge University Press. This book was released on 2013-01-03 with total page 481 pages. Available in PDF, EPUB and Kindle. Book excerpt: This consistent and systematic review of recent advances in optical antenna theory and practice brings together leading experts in the fields of electrical engineering, nano-optics and nano-photonics, physical chemistry and nanofabrication. Fundamental concepts and functionalities relevant to optical antennas are explained, together with key principles for optical antenna modelling, design and characterisation. Recognising the tremendous potential of this technology, practical applications are also outlined. Presenting a clear translation of the concepts of radio antenna design, near-field optics and field-enhanced spectroscopy into optical antennas, this interdisciplinary book is an indispensable resource for researchers and graduate students in engineering, optics and photonics, physics and chemistry.
Download or read book Solitons in Molecular Systems written by Davydov and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 337 pages. Available in PDF, EPUB and Kindle. Book excerpt: Approach your problems from the It isn't that they can't see the end and begin with the answers. solution. It is that they can't Then one day, perhaps you will see the problem. find the final question. G.K. Chesterton. The Scandal of 'The Hermit Clad in Crane Father Brown 'The Point of a Pin'. Feathers' in R. van Gulik's The Chinese Maze Murders. Growing specialization and diversification have brought a host of mono graphs and textbooks on increasingly topics. However, the "tree" of knowledge of mathematics and related fields does not grow only by putting forth new branches. It also happens, quite often in fact, that branches which were thought to be completely disparate are suddenly seen to be related. Further, the kind and level of sophistication of mathematics applied in various sciences has changed drastically in recent years: measure theory is used (non-trivially) in regional and theoretical economics; algebraic geometry interacts with physics; the Minkowsky lemma, coding theory and the structure of water meet one another in packing and covering theory; quantum fields, crystal defects and mathematical pro gramming profit from homotopy theory; Lie algebras are relevant to filtering; and prediction and electric engineering can use Stein spaces. And in addition to this there are such new emerging subdisciplines as "complete integrable systems", "chaos, synergetics and large-scale order", which are almost impossible to fit into the existing classifica tion schemes. The draw upon widely different sections of mathematics.
Download or read book Luminescent Nanomaterials written by Odireleng Martin Ntwaeaborwa and published by CRC Press. This book was released on 2022-05-19 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent decades, luminescent nanomaterials have generated great interest in the scientific community due to their unique properties, which are different from those of their bulk counterparts, and their use in a wide variety of applications. Today, luminescent nanomaterials are used in a number of applications such as displays, solid-state lighting, solar cells, long afterglow, dosimetry, theft prevention, medical imaging, phototherapy, and quantum and gas sensing. This book presents cutting-edge research from experts in the field of synthesis and characterization of luminescent nanomaterials and their potential applications. It covers interesting topics in semiconductor physics, photochemistry, physical chemistry, materials science, and luminescence, and will be useful for beginners and advanced researchers interested in this field.
Download or read book Nanotechnology Research Directions IWGN Workshop Report written by R.S. Williams and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 367 pages. Available in PDF, EPUB and Kindle. Book excerpt: energy production, environmental management, transportation, communication, computation, and education. As the twenty-first century unfolds, nanotechnology's impact on the health, wealth, and security of the world's people is expected to be at least as significant as the combined influences in this century of antibiotics, the integrated circuit, and human-made polymers. Dr. Neal Lane, Advisor to the President for Science and Technology and former National Science Foundation (NSF) director, stated at a Congressional hearing in April 1998, "If I were asked for an area of science and engineering that will most likely produce the breakthroughs of tomorrow, I would point to nanoscale science and engineering. " Recognizing this potential, the White House Office of Science and Technology Policy (OSTP) and the Office of Management and Budget (OMB) have issued a joint memorandum to Federal agency heads that identifies nanotechnology as a research priority area for Federal investment in fiscal year 2001. This report charts "Nanotechnology Research Directions," as developed by the Interagency W orking Group on Nano Science, Engineering, and Technology (IWGN) of the National Science and Technology Council (NSTC). The report incorporates the views of leading experts from government, academia, and the private sector. It reflects the consensus reached at an IWGN-sponsored workshop held on January 27-29, 1999, and detailed in contributions submitted thereafter by members of the V. S. science and engineering community. (See Appendix A for a list of contributors.
