Download or read book Ultra fast Spectroscopy Investigation on Organic Molecules Two Photon Absorption written by King Fai Li and published by . This book was released on 2008 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ultrafast Two photon Absorption in Organic Molecules written by Nikolay Sergeevich Makarov and published by . This book was released on 2010 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation explores quantitative two-photon absorption spectroscopy to relate molecular structure with optical properties of organic chromophores. The dissertation describes an advanced fluorescence-based technique for reliable measurements of the two-photon spectra and cross sections. To facilitate the measurements it establishes a set of reference compounds measured with a 15% absolute accuracy covering a broad range of excitation and fluorescence wavelengths. The dissertation shows that in many cases the few-essential-levels model can be successfully applied for the description and interpretation of two-photon absorption spectra and cross sections, at least for the low-energy transitions. The dissertation presents examples of applications of two-photon absorption for volumetric optical storage and cancer tumor detection. It describes the basic principles of the two-photon absorption-based optical memory and limitations imposed on two-photon sensitivity of photochromic materials by a necessity of fast access to the data. It also proposes a novel technique for sensitive detection of cancer cells by using two-photon excitation of near-IR fluorescence of a commercial dye and discusses the mechanisms responsible for differentiation between the normal and the cancer cells. The methods described in this dissertation can be applied to understanding the relations between structure and two-photon absorption strength of individual transitions of organic and biological chromophores, which can be used for design of new materials, maximally adapted for particular applications.
Download or read book Molecular and Laser Spectroscopy written by V.P. Gupta and published by Elsevier. This book was released on 2017-09-18 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: Molecular and Laser Spectroscopy: Advances and Applications provides students and researchers with an up-to-date understanding of the fast-developing area of molecular and laser spectroscopy. Editor V.P. Gupta has brought together the eminent scientists on a selection of topics to develop a systematic approach, first covering basic principles needed to understand each cutting-edge technique and application. This book acts as a standard reference for advanced students of molecular and laser spectroscopy and as a graduate text for new entrants in the field. The book covers a wide range of applications of molecular and laser spectroscopy in diverse areas ranging from materials to medicine and defence, biomedical research, environmental monitoring, forensic investigations, food and agriculture, and chemical, pharmaceutical and petrochemical processes. Researchers and scientific personnel in these fields will learn the latest techniques in order to put them to practical use in their work. Covers several areas of spectroscopy research in a single volume, saving researchers time Includes exhaustive lists of research articles, reviews and books at the end of each chapter to point readers in the right direction for further learning Features illustrative examples of the varied applications Serves as a practical guide to those interested in using molecular and laser spectroscopy tools in their research and field applications
Download or read book Ultrafast Phenomena XV written by Paul Corkum and published by Springer Science & Business Media. This book was released on 2007-08-15 with total page 853 pages. Available in PDF, EPUB and Kindle. 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.
Download or read book Spectroscopy and Dynamics of Single Molecules written by and published by Elsevier. This book was released on 2019-08-14 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spectroscopy and Dynamics of Single Molecules: Methods and Applications reviews the most recent developments in spectroscopic methods and applications. Spectroscopic techniques are the chief experimental methods for testing theoretical models and research in this area plays an important role in stimulating new theoretical developments in physical chemistry. This book provides an authoritative insight into the latest advances in the field, highlighting new techniques, current applications, and potential future developments An ideal reference for chemists and physicists alike, Spectroscopy and Dynamics of Single Molecules: Methods and Applications is a useful guide for all those working in the research, design, or application of spectroscopic tools and techniques across a wide range of fields. Includes the latest research on ultrafast vibrational and electronic dynamics, nonlinear spectroscopies, and single-molecule methods Makes the content accessible to researchers in chemistry, biophysics, and chemical physics through a rigorous multi-disciplinary approach Provides content edited by a world-renowned chemist with more than 30 years of experience in research and instruction
Download or read book Ultrafast Spectroscopy of New Organic Molecules for Photovoltaic Applications written by Thomas Roland and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The topic of this thesis is the study -through different spectroscopy methods- of new organic molecules for photovoltaic applications. Combination of time resolved fuorescence, time resolved differential absorption and spectro-electro-chemistry with global analysis methods allowed to determine the photo-dynamics of the studied molecules. Two familiesof molecules have been studied. The first one is a donor-type antenna based on the BODIPY dye. The second consists in a donor-acceptor-donor (DAD) triad, with self-organizing properties. After a first generation of molecules that we proved to be limited by a short life time of its charge transfer state (about 55 ps), a second generation of molecules wasdeveloped, including several variation of the donor group, which allowed to study the impact of said variation. Among others, a charge transfer state lifetime longer than 1 nanosecond was observed.
Download or read book Ultrafast Dynamics In Molecules Nanostructures And Interfaces Selected Lectures Presented At Symposium On Ultrafast Dynamics Of The 7th International Conference On Materials For Advanced Technologies written by Guglielmo Lanzani and published by World Scientific. This book was released on 2014-01-22 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: Primary events in natural systems or devices occur on extremely short time scales, and yet determine in many cases the final performance or output. For this reason research in ultrafast science is of primary importance and impact in both fundamental research as well as its applications. This book reviews the advances in the field, addressing timely and open questions such as the role of quantum coherence in biology, the role of excess energy in electron injection at photovoltaic interfaces or the dynamics in quantum confined structures (e.g. multi carrier generation). The approach is that of a monograph, with a broad tutorial introduction and an overview of the recent results. This volume includes selected lectures presented at Symposium on Ultrafast Dynamics of the 7th International Conference on Materials for Advanced Technologies.
Download or read book Ultrafast Optics And Spectroscopy In Physical Chemistry written by Atanu Bhattacharya and published by World Scientific. This book was released on 2017-12-28 with total page 291 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary goal of this text book is to ensure that any physical science student, even one who has never heard of the subject, should be able to learn what ultrafast spectroscopy is, why optics related to the subject requires special attention, how to use the basic ideas of the subject in laboratory-based ultrafast spectroscopy experiments, how to interpret the experimental observations and so on. This book gives a more than adequate introduction to mathematical representation of an ultrafast pulse, chirp, time-band width product, nonlinear optical effects, dispersion effects, construction of ultrafast laser, ultrafast measurement techniques and different ultrafast processes of chemical interest.
Download or read book Exploration of the Excited States of Organic Molecules and Metal Complexes Using Ultrafast Laser Spectroscopy written by Nicole Marie Dickson and published by . This book was released on 2011 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: The excited states of organic molecules and inorganic complexes were examined using ultrafast time resolved spectroscopies. Femtosecond transient absorption was used to unveil the early-time dynamics of organic molecules and inorganic complexes. Picosecond time correlated single photon counting was used to observe emission lifetimes. Nanosecond transient absorption spectroscopy was used to observe the molecules and complexes on the nanosecond to microsecond time scale. The nature of the lowest excited symmetry state was studied in 1,4-diphenyl-1,3-butadiene and 1,1,4,4-tetraphenyl-1,3-butadiene and was determined to have mixed character that was highly dependent on solvent. The inorganic complexes studied here have application as photodynamic therapy (PDT) agents. [Ru(bpy)2(BN)2]2 complexes, where BN is methylbenzonitrile or methoxybenzonitrile, undergo ligand exchange in water. Upon photoaquation, the complexes may bind to DNA and cause cell death. The process of ligand exchange was studied on the femtosecond time scale. It was found that ligand exchange occurs in concert with intersystem crossing to the triplet state within the time duration of the laser pulse (300 fs). Finally, the PDT agents [Ru(bpy)2(dppn)]2 and [Os(bpy)2(dppn)]2 were studied to unveil the effects of the low-lying LC 3[pai][pai]* state on the excited-state decay processes. From the initial excited state in [Ru(bpy)2(dppn)]2+ and [Os(bpy)2(dppn)]2+ deactivation to the 3 [pai][pai]* state and the 3 MLCT state occurs within 300 fs.
Download or read book Ultrafast Phenomena in Spectroscopy written by and published by . This book was released on 1981 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ultrafast Dynamics at the Nanoscale written by Stefan Haacke and published by CRC Press. This book was released on 2017-01-06 with total page 529 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultrafast Dynamics at the Nanoscale provides a combined experimental and theoretical insight into the molecular-level investigation of light-induced quantum processes in biological systems and nanostructured (bio)assemblies. Topics include DNA photostability and repair, photoactive proteins, biological and artificial light-harvesting systems, plasmonic nanostructures, and organic photovoltaic materials, whose common denominator is the key importance of ultrafast quantum effects at the border between the molecular scale and the nanoscale. The functionality and control of these systems have been under intense investigation in recent years in view of developing a detailed understanding of ultrafast nanoscale energy and charge transfer, as well as fostering novel technologies based on sustainable energy resources. Both experiment and theory have made big strides toward meeting the challenge of these truly complex systems. This book, thus, introduces the reader to cutting-edge developments in ultrafast nonlinear optical spectroscopies and the quantum dynamical simulation of the observed dynamics, including direct simulations of two-dimensional optical experiments. Taken together, these techniques attempt to elucidate whether the quantum coherent nature of ultrafast events enhances the efficiency of the relevant processes and where the quantum–classical boundary sets in, in these high-dimensional biological and material systems. The chapters contain well-illustrated accounts of the authors’ research work, including didactic introductory material, and address a multidisciplinary audience from chemistry, physics, biology, and materials sciences. The book is, therefore, a must-have for graduate- and postgraduate-level researchers who wish to learn about molecular nanoscience from a combined spectroscopic and theoretical viewpoint.
Download or read book Photoresponsive Polymers I written by Seth Marder and published by Springer Science & Business Media. This book was released on 2008-07-31 with total page 219 pages. Available in PDF, EPUB and Kindle. Book excerpt: With contributions by numerous experts
Download or read book Ultrafast Processes in Spectroscopy written by Orazio Svelto and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is a collection of papers presented at the Ninth International Symposium on "Ultrafast Processes in Spectroscopy" (UPS '95) held at the International Centre for Theo retical Physics (ICTP), Trieste (Italy), October 30 -November 3, 1995. These meetings have become recognized as the major forum in Europe for discussion of new work in this rapidly moving field. The UPS'95 Conference in Trieste brought together a multidisciplinary group of researchers sharing common interests in the generation of ultrashort optical pulses and their application to studies of ultrafast phenomena in physics, chemistry, material science, electronics, and biology. It was attended by approximately 250 participants from 20 countries and the five-day program comprises more than 200 papers. The progress of both technology and applications in the field of ultrafast processes during these last years is truly remarkable. The advent of all solid state femtosecond lasers and the extension of laser wavelengths by frequency conversion techniques provide a large variety of high-performance light sources for ultrashort pulses. With these sources ultrafast phenomena in physical, chemical and biological systems and in electronic de vi(:es are now studied extensively. Ultrafast technology is becoming one of the basic and common tools presently entering a wide variety of scientific fields not only for basic re search but also for promoting new applications in various areas. We feel that these pro ceedings vividly reflect the present status of the field.
Download or read book Recent Advances in Ultrafast Spectroscopy written by S. Califano and published by Olschki. This book was released on 2003 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the First International Workshop on Optical Power Limiting written by Francois Kajzar and published by CRC Press. This book was released on 1999 with total page 572 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Quantum Efficiency in Complex Systems Part II From Molecular Aggregates to Organic Solar Cells written by and published by Academic Press. This book was released on 2011-11-23 with total page 377 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since its inception in 1966, the series of numbered volumes known as Semiconductors and Semimetals has distinguished itself through the careful selection of well-known authors, editors, and contributors. The "Willardson and Beer" Series, as it is widely known, has succeeded in publishing numerous landmark volumes and chapters. Not only did many of these volumes make an impact at the time of their publication, but they continue to be well-cited years after their original release. Recently, Professor Eicke R. Weber of the University of California at Berkeley joined as a co-editor of the series. Professor Weber, a well-known expert in the field of semiconductor materials, will further contribute to continuing the series' tradition of publishing timely, highly relevant, and long-impacting volumes. Some of the recent volumes, such as Hydrogen in Semiconductors, Imperfections in III/V Materials, Epitaxial Microstructures, High-Speed Heterostructure Devices, Oxygen in Silicon, and others promise that this tradition will be maintained and even expanded. Reflecting the truly interdisciplinary nature of the field that the series covers, the volumes in Semiconductors and Semimetals have been and will continue to be of great interest to physicists, chemists, materials scientists, and device engineers in modern industry. Written and edited by internationally renowned experts Relevant to a wide readership: physicists, chemists, materials scientists, and device engineers in academia, scientific laboratories and modern industry
Download or read book Research in Progress written by and published by . This book was released on 1965 with total page 1194 pages. Available in PDF, EPUB and Kindle. Book excerpt:
