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P. Huong - One of the best experts on this subject based on the ideXlab platform.

  • MATERIALS AND INTERFACES CHARACTERIZATION BY MICRO-Raman Spectroscopy
    Journal de Physique IV Colloque, 1991
    Co-Authors: P. Huong
    Abstract:

    Several aspects of Raman and micro-Raman Spectroscopy are shown and applied for the characterization of semiconductor materials and bi-layers of semiconductor on semiconductor and insulator on semiconductor. As a molecular technique, Raman Spectroscopy will inform not only on the nature of elements but also on chemical bonds between atoms. Raman Spectroscopy also permits the studies of disordered or amorphous materials. Based on the anisotropy in Raman scattering, the determination of the orientation of surfaces and thin layers becomes also easy. Micro-Raman Spectroscopy, with a spatial resolution of the order of 1 µm2, allows the study of heterogenous or very small materials. This technique is very helpful in the determination of heterogeneity, stress and gradient in semiconductors. On step-etched or bevelled samples of a bi-layer, micro-Raman Spectroscopy helps to examine the epitaxy quality of the deposit versus its thickness and also to detect eventual chemical bonds between deposit and substrate.

Teizo Kitagawa - One of the best experts on this subject based on the ideXlab platform.

  • Resonance Raman Spectroscopy.
    Methods of Molecular Biology, 2014
    Co-Authors: Jiang Li, Teizo Kitagawa
    Abstract:

    The main topics in resonance Raman Spectroscopy presented at ICPP-2 in Kyoto are briefly discussed. These include: (i) coherent Spectroscopy and low frequency vibrations of ligand- photodissociated heme proteins, (ii) vibrational relaxation revealed by time-resolved anti-Stokes Raman Spectroscopy, (iii) electron transfer in porphyrin arrays, (iv) vibrational assignments of tetraazaporphyrins and (v) resonance Raman spectra of an NO storing protein, nitrophorin. Copyright © 2002 Society of Porphyrins & Phthalocyanines.

  • Resonance Raman Spectroscopy
    Journal of Porphyrins and Phthalocyanines, 2002
    Co-Authors: Teizo Kitagawa
    Abstract:

    The main topics in resonance Raman Spectroscopy presented at ICPP-2 in Kyoto are briefly discussed. These include: (i) coherent Spectroscopy and low frequency vibrations of ligand-photodissociated heme proteins, (ii) vibrational relaxation revealed by time-resolved anti-Stokes Raman Spectroscopy, (iii) electron transfer in porphyrin arrays, (iv) vibrational assignments of tetraazaporphyrins and (v) resonance Raman spectra of an NO storing protein, nitrophorin.

Srikanth Singamaneni - One of the best experts on this subject based on the ideXlab platform.

  • Micro-Raman Spectroscopy of Nanostructures
    Raman Spectroscopy for Nanomaterials Characterization, 2012
    Co-Authors: Ramesh Kattumenu, Chang H. Lee, Valery N. Bliznyuk, Srikanth Singamaneni
    Abstract:

    Micro-Raman Spectroscopy (μRS) involves acquiring spatially resolved Raman spectra by combining the conventional Raman spectrometer with a microscopic tool, typically an optical microscope. This chapter introduces the basic methodology of micro-Raman Spectroscopy and presents an overview of its application to organic and inorganic nanostructures using specific examples from literature.

Ren Tianling - One of the best experts on this subject based on the ideXlab platform.

  • Applications of Micro-Raman Spectroscopy in Microelectronics
    The Journal of Light Scattering, 2011
    Co-Authors: Ren Tianling
    Abstract:

    The micro-Raman Spectroscopy has the advantages of the sensitivity of vibration and rotation energy in lattice and molecule,as well as the non-destructive feature.In the research of microelectronics,an in situ and non-contact measurement method is needed to study crystallinity,stress and thermal properties of varied materials and devices.The micro-Raman Spectroscopy becomes an effective method to those studies.In this paper,we use both survey and experiment to investigate the details of the applications of micro-Raman Spectroscopy,which has been applied to silicon and carbon materials,as well as merging methods based on micro-Raman Spectroscopy.According to numerous previous reports,micro-Raman Spectroscopy will have even more extensive applications with the development of the microelectronics.

Victor I. Mikla - One of the best experts on this subject based on the ideXlab platform.

  • Raman Spectroscopy in Medicine
    Medical imaging technology, 2014
    Co-Authors: Victor I. Mikla
    Abstract:

    One can observe recently a remarkable increase in the application of Raman Spectroscopy to the field of medicine. The reason is that Raman, like IR Spectroscopy, is a vibrational spectroscopic technique capable of providing details on the chemical composition, molecular structure, and corresponding molecular interactions in cells and tissues. As diseases progressed, clearly identifiable changes in the molecular composition of affected tissues changes are reflected (or becomes “visible”) in Raman spectra. In a case then the spectral changes are inherent (specific) for a particular disease state, they can, in principle, be used as phenotypic markers or signs of the disease. Many studies in the literature have illustrated that differences can be observed between ex vivo Raman spectra of healthy and diseased tissues. The majority of these studies are only exploratory in nature. Nevertheless, the clear message is that clinical diagnostic tools can be successfully developed from the Raman spectroscopic fingerprints of tissues. Raman Spectroscopy has recently been applied ex vivo and in vivo to address various biomedical issues such as the early detection of cancers, monitoring of the effect of various agents on the skin, determination of atherosclerotic plaque composition, and rapid identification of pathogenic microorganisms. Nowadays Raman Spectroscopy becomes a potentially important clinical tool for real-time diagnosis of disease and in situ evaluation of living tissue. The purpose of this chapter is to review the biological and physical basis of Raman Spectroscopy of tissue, to assess the current status of the field, and to explore future directions. The principles of Raman Spectroscopy and the information it provides on molecular level are briefly explained. The authors try to present an overview of the evolution of Raman spectroscopic techniques in biology and medicine, from early investigations using visible laser excitation to present-day technology based on near-infrared laser excitation and charge-coupled device array detection. State-of-the-art Raman spectrometer systems both for research laboratory and for clinical settings are described. Modern methods of multifunctional spectral analysis for extracting diagnostic, chemical, and morphological information are reviewed. Several in-depth applications are presented to illustrate the methods of collecting, processing, and analyzing data. Various clinical applications of Raman Spectroscopy, as well as some directions for future are discussed.