Download or read book The Development of Morphology Dependent Stimulated Raman Scattering MDSRS and Its Application to the Detection of Sulfate in Aerosol Particles written by Alan Scott Olson and published by . This book was released on 1993 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Journal of Chemical Physics written by and published by . This book was released on 1999 with total page 926 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stimulated Raman Scattering Microscopy written by Ji-Xin Cheng and published by Elsevier. This book was released on 2021-12-04 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stimulated Raman Scattering Microscopy: Techniques and Applications describes innovations in instrumentation, data science, chemical probe development, and various applications enabled by a state-of-the-art stimulated Raman scattering (SRS) microscope. Beginning by introducing the history of SRS, this book is composed of seven parts in depth including instrumentation strategies that have pushed the physical limits of SRS microscopy, vibrational probes (which increased the SRS imaging functionality), data science methods, and recent efforts in miniaturization. This rapidly growing field needs a comprehensive resource that brings together the current knowledge on the topic, and this book does just that. Researchers who need to know the requirements for all aspects of the instrumentation as well as the requirements of different imaging applications (such as different types of biological tissue) will benefit enormously from the examples of successful demonstrations of SRS imaging in the book. Led by Editor-in-Chief Ji-Xin Cheng, a pioneer in coherent Raman scattering microscopy, the editorial team has brought together various experts on each aspect of SRS imaging from around the world to provide an authoritative guide to this increasingly important imaging technique. This book is a comprehensive reference for researchers, faculty, postdoctoral researchers, and engineers. Includes every aspect from theoretic reviews of SRS spectroscopy to innovations in instrumentation and current applications of SRS microscopy Provides copious visual elements that illustrate key information, such as SRS images of various biological samples and instrument diagrams and schematics Edited by leading experts of SRS microscopy, with each chapter written by experts in their given topics
Download or read book Stimulated Raman Scattering from Individual Water and Ethanol Droplets at Morphology Dependent Resonances written by J. B. Snow and published by . This book was released on 1985 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stimulated Raman scattering (SRS) from an individual liquid droplet (approx. = 30 micrometer radius) has been observed for H2O, D2O, and ethanol. The occurrence of a series of spectrally narrow peaks that are regularly spaced in wavelength is consistent with morphology-dependent resonances of the droplet, which acts as an optical resonator. The input intensity required to achieve the SRS threshold for the droplet is considerably less than that for the liquid in an optical cell. Additional keyword: Reprints.
Download or read book New Developments in Stimulated Raman Scattering and Applications to Plastic Particle Detection in the Environment and Human Tissue written by and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis deals with an advanced laser-based microscopy technique to detect micrometer-size objects with molecular specificity. Applications are shown from the aquatic environment and from the medical world. The final chapters describe an option to increase the penetration depth through scattering samples and simulation software to help optimize the measurement settings. One of the most prominent materials in modern life is plastic, but this also results in the large-scale production of plastic waste. A portion of this waste reaches the environment and is fragmented into small pieces, called microplastics. Microplastics pollution affects the environment and potentially our health in ways we are only beginning to understand. To study it, we need to have a solid measurement and monitoring platform, based on reliable microplastics detection. Detection of microplastics is difficult due to their small size and heterogeneity and they can be found in different types of matrices in the environment and even in the human body. A label-free microscopy imaging technique, called Stimulated Raman Scattering (SRS) microscopy, is able to create images of small particles, like microplastics, based on their molecular structure. SRS makes use of two synchronized pulsed lasers of different colors, of which the energy difference matches a specific vibration of the target molecule. In this thesis, we used SRS for identifying five polymer types. First, we tested the approach on an artificial mixture of plastic particles, and we identified polyethylene terephthalate particles extracted from nail polish, demonstrating also the thousand‐fold higher speed of mapping compared with conventional Raman. Furthermore, we found 12,000 plastic particles per kilogram dry weight in a Rhine estuary sediment sample. SRS was the fastest microplastics detection method at the time of publication.
Download or read book Surface Enhanced Raman Scattering written by Richard Chang and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the course of the development of surface science, advances have been identified with the introduction of new diagnostic probes for analytical characterization of the adsorbates and microscopic structure of surfaces and interfaces. Among the most recently de veloped techniques, and one around which a storm of controversy has developed, is what has now been earmarked as surface enhanced Raman scattering (SERS). Within this phenomenon, molecules adsorbed onto metal surfaces under certain conditions exhibit an anomalously large interaction cross section for the Raman effect. This makes it possible to observe the detailed vibrational signature of the adsorbate in the ambient phase with an energy resolution much higher than that which is presently available in electron energy loss spectroscopy and when the surface is in contact with a much larger amount of material than that which can be tolerated in infrared absorption experiments. The ability to perform vibrational spectroscopy under these conditions would lead to a new understanding about the chemical identity, geome try, and bonding of adsorbed material at a level previously unacces sible. It is for these reasons that the last few years have brought an explosion of activity surrounding the exploitation of SERS. The search for the origines) of the anomalous enhancement has given rise to a research sub-activity of its own. Efforts to explain the en hancement have led to an increased understanding of the whole range of phenomena associated with the interaction of photons with adsor bates and metal surfaces.
Download or read book Enhancement of Raman Signals written by He-Chun Chou and published by . This book was released on 2012 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: Raman spectroscopy is a promising technique because it contains abundant vibrational chemical information. However, Raman spectroscopy is restricted by its small scattering cross section, and many techniques have been developed to amplify Raman scattering intensity. In this dissertation, I study two of these techniques, coherent Raman scattering and surface enhanced Raman scattering and discuss their properties. In the first part of my dissertation, I investigate two coherent Raman processes, coherent anti-Stokes Raman scattering (CARS) and stimulated Raman scattering (SRS). In CARS project, I mainly focus on the molecular resonance effect on detection sensitivity, and I find the detection sensitivity can be pushed into 10 [micromolar] with the assistance of molecular resonance. Also, I am able to retrieve background-free Raman spectra from nonresonant signals. For SRS, we develop a new SRS system by applying spectral focusing mechanism technique. We examine the feasibility and sensitivity of our SRS system. The SRS spectra of standards obtained from our system is consistent with literature, and the sensitivity of our system can achieve 10 times above shot-noise limit. In second part of this dissertation, I study surface enhanced Raman scattering (SERS) and related plasmonic effects. I synthesize different shapes of nanoparticles, including nanorod, nanodimer structure with gap and pyramids by template method, and study how electric field enhancement effects correlate to SERS by two photon luminescence (TPL). Also, I build an optical system to study optical image, spectra and particle morphology together. I find that SERS intensity distribution is inhomogeneous and closely related to nanoparticle shape and polarization direction. However, TPL and SERS are not completely correlated, and I believe different relaxation pathways of TPL and SERS and coupling of LSPR and local fields at different frequencies cause unclear correlation between them.
Download or read book Characteristics and Applications of Stimulated Raman Scattering in Microdroplets written by Ali Serpenguzel and published by . This book was released on 1992 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Surface Enhanced Raman Scattering New Theoretical Approaches Materials and Strategies written by Ivano Alessandri and published by Frontiers Media SA. This book was released on 2020-03-25 with total page 175 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Characteristics and Applications of Stimulated Raman Scattering in Microdroplets written by Ali Serpenguzel and published by . This book was released on 1992 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Raman Capabilities for Aerosol Characterization written by Richard K. Chang and published by . This book was released on 1980 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chemical speciation of microparticles can be achieved by spectral and intensity analyses of the inelastically scattered radiation (Raman and fluorescence). However, quantitative results by purely optical methods are intimately related to the environment with which the particles are in contact and the morphology of the microstructures. Morphology characterization of regularly shaped microparticles (spheres, cylinders, and spheroids) can be obtained by measuring the peaks in the extinction and elastically scattering spectra. Our investigation on the viability of quantitative species identification of molecules within a microparticle by inelastic laser scattering involved studies of the following: (1) dielectric and metal substrate interface to increase the intensity of the scattered radiation; and (2) morphology dependent dielectric resonances which can modify the scattering spectra.
Download or read book Morphology Dependent Raman Spectra from Microparticles written by J. F. Owen and published by . This book was released on 1982 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Micro Raman Spectroscopy written by Jürgen Popp and published by Walter de Gruyter GmbH & Co KG. This book was released on 2020-02-10 with total page 231 pages. Available in PDF, EPUB and Kindle. Book excerpt: Micro-Raman Spectroscopy introduces readers to the theory and application of Raman microscopy. Raman microscopy is used to study the chemical signature of samples with little preperation in a non-destructive manner. An easy to use technique with ever increasing technological advances, Micro-Raman has significant application for researchers in the fields of materials science, medicine, pharmaceuticals, and chemistry.
Download or read book Development of Multidimensional Spectral Data Processing Procedures for Analysis of Composition and Mixing State of Aerosol Particles by Raman and FTIR Spectroscopy written by Damian Siepka and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sufficiently adjusted, multivariate data processing methods and procedures can significantly improve the process for obtaining knowledge of a sample composition. Spectroscopic techniques have capabilities for fast analysis of various samples and were developed for research and industrial purposes. It creates a great possibility for advanced molecular analysis of complex samples, such as atmospheric aerosols. Airborne particles affect air quality, human health, ecosystem condition and play an important role in the Earth's climate system. The purpose of this thesis is twofold. On an analytical level, the functional algorithm for evaluation of quantitative composition of atmospheric particles from measurements of individual particles by Raman microspectrocopy (RMS) was established. On a constructive level, the readily accessible analytical system for Raman and FTIR data processing was developed. A potential of a single particle analysis by RMS has been exploited by an application of the designed analytical algorithm based on a combination between a multicurve resolution and a multivariate data treatment for an efficient description of chemical mixing of aerosol particles. The algorithm was applied to the particles collected in a copper mine in Bolivia and provides a new way of a sample description. The new user-friendly software, which includes pre-treatment algorithms and several easy-to access, common multivariate data treatments, is equipped with a graphical interface. The created software was applied to some challenging aspects of a pattern recognition in the scope of Raman and FTIR spectroscopy for coal mine particles, biogenic particles and organic pigments.
Download or read book Frontiers of Surface Enhanced Raman Scattering written by Yukihiro Ozaki and published by John Wiley & Sons. This book was released on 2014-02-19 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive presentation of Surface-Enhanced Raman Scattering (SERS) theory, substrate fabrication, applications of SERS to biosystems, chemical analysis, sensing and fundamental innovation through experimentation. Written by internationally recognized editors and contributors. Relevant to all those within the scientific community dealing with Raman Spectroscopy, i.e. physicists, chemists, biologists, material scientists, physicians and biomedical scientists. SERS applications are widely expanding and the technology is now used in the field of nanotechnologies, applications to biosystems, nonosensors, nanoimaging and nanoscience.
Download or read book Advancements in Stimulated Raman Scattering Microscopy written by Benjamin Figueroa (Jr.) and published by . This book was released on 2020 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stimulated Raman scattering (SRS) microscopy has transformed our ability to image chemical and biological systems because of its sub-micrometer resolution and molecular specificity. However, limitations in small spectral coverage, poor spectral resolution, and low sensitivity hamper the ability of SRS to investigate complex systems. Furthermore, the usage of SRS microscopy beyond biological systems is still very limited. Here I present my work which specifically addresses these issues. In chapters 2 and 3 I demonstrate the benefits of using SRS microscopy outside of its current biological niche, by investigating materials such as latent fingerprints and pharmaceutical tablets. In chapter 4 I address the limitations of poor spectral resolution and small spectral coverage by developing a parabolic fiber amplifier to provide a better SRS microscope. In chapter 5 I demonstrate an application of the developed fiber amplifier system for monitoring and quantifying temperature at the microscale level. Lastly, in chapter 6 I introduce the development of a new optical parametric oscillator (OPO) source to address the final limitation by increasing the sensitivity of SRS imaging, which ties into the future outlook on advancements needed in SRS microscopy.
Download or read book Development and Use of a Ray based Analysis Tool for the Investigation of Stimulated Raman Scattering in Laser plasma Interaction Experiments written by Steven Hironaka and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent long-scale-length spherical target experiments, performed on the OMEGA EP laser, are analyzed for stimulated Raman side-scattering (SRSS). This work has been motivated by results obtained on experiments performed at the Nation Ignition Facility (NIF), relevant to directly-driven inertial confinement fusion (ICF). These NIF experiments have shown SRSS to be an important process, possibly responsible for the observed hot electron generation. Our model, based on ray tracing, is able to explain the time-dependent scattered light spectra from the OMEGA EP experiments: It identifies SRS side-scatter and near backscatter from portions of each incident beam where the scattered electromagnetic wave is generated in the direction parallel to contours of constant density. The nature of SRSS instability (temporal versus spatial growth) is discussed. It is suggested that the OMEGA EP platform could provide a good surrogate in which to develop SRSS mitigation strategies.
