Chemical species that exhibit a change in polarizability with vibration (including all known neat molecular explosives) exhibit Raman spectra that are uniquely determined by their vibrational mode structure. Samples are illuminated by a laser beam causing Raman lines of the different substances to be emitted. [7]. In Situ Liquid Crystal Tunable Filter Raman Chemical Imaging. Mineral Characterization on Planetary Surfaces A patent application for laser Raman applied to the remote identification of hazardous gases from explosives decomposition was filed a few years later [31]. . Raman Spectroscopy Applied to Health Sciences. Several examples of Raman images of heterogeneous samples are presented. The implementation of FT spectrometers and lasers with output wavelengths that minimized sample fluorescence increased the utility of the technique and fostered application to explosive analysis. For the quantification of the elements, sensibility factors provided by the manufacturers were used. Chase A. Munson, ... Andrzej W. Miziolek, in Counterterrorist Detection Techniques of Explosives, 2007. 1/3 It is a function to output data to the template file of PowerPoint prepared in advance.・ Raman image・ Spectrum・ Measurement conditionThe necessary data can be arranged on the slide with one click because it can be output at once. The current state of the technology, and the scientific advances made to date, are documented with a basic description of Raman physics sufficient to illustrate the advantages of Raman spectroscopy. The composition rate of a sample is evaluated from a Raman image which shows the distribution of components. Spectroscopic coherent Raman imaging of Caenorhabditis elegans reveals lipid particle diversity. Prototype Raman Spectroscopic Sensor for MoO3 phase was detected only in the sample prepared at pH 6.0. RAMANtouch/RAMANforce has a brand-new wide field-of-view (FOV) Raman imaging capability. Even with samples that have been uneven due to surface irregularities, it is possible to obtain clear Raman images without blurring. Defect-moderated oxidative etching of MoS Confocal Direct Imaging Raman Microscope: Design and Applications in Biology. The statistics (maximum, minimum, average value, standard deviation, etc.) Time-Resolved and Two-Dimensional NIR FT-Raman Spectroscopy. The chapter concludes with commentary and consideration regarding the possibilities for breaking with traditional spectrographic methods used so far. The catalyst prepared at pH 8.5 is a solid solution of β-NiMoO4 and β-CoMoO4 in a common molybdate structure and probably NiO and CO3O4 separated phases. No charge compensation was provided. Using the strain-induced shifts in Raman spectra of cellulose fibres such as hemp (Eichhorn et al., 2000), information such as the maximum interfacial shear stress of a hemp single fibre embedded in a droplet of epoxy was obtained (Eichhorn and Young, 2004). Raman spectroscopy in art and archaeology. Direct Imaging Raman Microscope Based on Tunable Wavelength Excitation and Narrow-Band Emission Detection. Evaluating the Effects of Autofluorescence during Raman Hyperspectral Imaging. Analytical techniques based on Raman spectroscopy have been widely used for explosive detection and characterization. Combined Application of Imaging Methods for the Characterization of a Polymer Blend. Proceedings, annual meeting, Electron Microscopy Society of America. Tissue diagnosis using power-sharing multifocal Raman micro-spectroscopy and auto-fluorescence imaging. RAMANtouch has an internal reference sample for calibration. Vibrational spectroscopic imaging of pathogens, microorganisms, and their interactions with host systems. Polarized Micro-Raman and FT-IR Spectra of L-Glutamine. Two layers of corrosion products were observed at the interface between the residual alloy and the soil products. M.M. For TNT, the Raman cross-section of the 1351.6 cm–1 –NO2 stretching mode is 5.18 (±0.4)× 10–26 cm2/molecule, and for 2,4-DNT the Raman cross-section of the 1351.3 cm–1 –NO2 stretching mode is 7.25 (±1.1) × 10–26 cm2/molecule. By reconstructing the Raman image after the removal of spectra with a low contribution ratio (i.e., noise reduction), a clear Raman image consisting of high S/N spectra can be obtained even if the S/N of raw data is non-optimal. 5.25.Laser light enters through a small pinhole and reaches the objective lens. Raman and Infrared Spectroscopic Analysis. AreaFlash By scanning line illumination at high speed in the vertical direction, it is possible to acquire a wide range of average spectrum with one exposure. Photonics Center P3-321, Osaka University Suita Campus, 2-1, Yamadaoka, Suita, Osaka 565-0871, Japan Anna Klisinska, ... Eric M. Gaigneaux, in. The 2θ range was scanned from 10 to 70° at a rate of 0.3°min−1 with Si pieces laying flat on the sample holder. The full text of this article hosted at iucr.org is unavailable due to technical difficulties. Demonstration of enhancement of the Raman signal as the wavelength of the incident light approaches the wavelength of an allowed transition (resonance Raman spectroscopy, RRS), and the elimination of fluorescence when using incident radiation near 244 nm was first reported for explosives in 1997–1998 [42,43]. Raman imaging from microscopy to macroscopy: Quality and safety control of biological materials. Application of Micro-FT-IR Spectroscopy to Individual Hydrocarbon Fluid Inclusion Analysis. Analysis in Geological Thin-Sections by Laser Raman Microprobe Spectroscopy: A Cautionary Note The difference in energy between the incident and scattered photons (the Raman spectrum of the molecule) is typically a function of the vibrational energy levels within a molecule. Then it is focused on the biological sample and the scattered light from the sample is collected by the objective, passes through the dichroic mirror, and is directed toward the pinhole, which allows three-dimensional (3D) resolution of the image. It automatically measures the surface height of a sample while capturing a wide FOV microscopic image, and makes it possible to measure a wide FOV Raman image with auto-focusing. A Line-Scan Hyperspectral System for High-Throughput Raman Chemical Imaging. Since wavenumber calibration can be performed even during measurement, it is possible to correct slight changes in peak position due to changes in room temperature during measurement by measuring the spectrum of the reference sample at regular intervals. Spectroscopic Technique: Raman Spectroscopy. However, strong electron-withdrawing substituents R = COCF3, ArSO2 [76AHC(S1), p. 442], and NO2 [84KGS1569] can shift the tautomeric equilibrium to the imino form 67b. Detect partcles automatically in microscopic image. Raman spectroscopy: techniques and applications in the life sciences. Laser Raman spectra of the explosive formulation C-4, its main ingredient RDX, and samples of RDX of different origin are shown in Fig. with yolk–shell-like architecture as stable cathode material for lithium-ion batteries Hyperspectral Raman Imaging Using a Spatial Heterodyne Raman Spectrometer with a Microlens Array. Stand-off hyperspectral Raman imaging and random decision forest classification: a potent duo for the fast, remote identification of explosives. It works particularly well for long-term measurements. Different techniques using a triple monochromator or a holographic grating system are described. Measuring and analysis according to size classes as defined by ISO 16232 is also possible. A conclusion that the imino form 67b (R = R1 = H) predominates in DMF-d7 solution and occurs in detectable amounts in solutions of CCl4 and toluene made on the basis of IR and 1H NMR- spectroscopic studies (92ZOR1767) has been criticized [96CHEC-II(4)621]. The Development of a Fourier Transform Raman Microprobe. It is important to notice that all Raman spectra will exhibit in addition to the molybdate stretching modes, additional lines, which are due to the boehmite stretching modes [4] as reported in Table 1. A Low Stray Light Raman Microprobe Using Optical Fibers and GRIN Lenses. For tablets, because the diffusion effect can provide information up to a depth of about 0.5 mm inside, about 18 mm3 of volume area is the target of Raman measurement. We shall describe the study of the corrosion of lead in dilute Na2SO4 solutions (6). Mapowanie i obrazowanie ramanowskie przy użyciu mikroskopii konfokalnej. Nanosphere lithography for the fabrication of highly reproducible and robust SERS substrates is described. Also around this time, coherent anti-Stokes Raman spectroscopy (CARS) began to be developed for explosive analysis [33]. The first review of laser Raman spectroscopy of explosives appeared in the late 1960s [30]. D. Minoux, ... Edmond Payen, in Studies in Surface Science and Catalysis, 2000. Laser Fourier transform (FT)-Raman spectra of the explosive formulation C-4, its main ingredient RDX, and samples of RDX of different origin. The RMS1000 Raman Microscope is an open architecture, research grade confocal Raman Microscope. Raman Microprobe and Fourier Transform-Infrared Microsampling Studies of the Microstructure of Gallstones. Bands are observed at 149 and 976 cm−1, consistent with PbO and SO2−4 vibrations, respectively, and the relative intensities were in accordance with an assignment of vibrations of PbO and SO2−4 entities. This chapter provides a broad overview of recent developments in the application of laser Raman spectroscopy for in situ ocean research. The use of surface-enhanced Raman spectroscopy (SERS) for trace explosive detection was first investigated during the late 1990s [48]. Optical microscope images and Raman images can be displayed according to the surface shape, and the relationship of the distribution of the material with irregularities can also be checked.

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