Relevant bibliographies by topics / Raman spectroscopic characterization

Academic literature on the topic 'Raman spectroscopic characterization'

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Published: 10 December 2022
Last updated: 29 January 2023

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Journal articles on the topic "Raman spectroscopic characterization"

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REDD, DOUGLAS C. B. "RAMAN SPECTROSCOPIC TISSUE CHARACTERIZATION." INVESTIGATIVE RADIOLOGY 28, no. 12 (December 1993): 1189. http://dx.doi.org/10.1097/00004424-199312000-00060.

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Tang, Bo, Hu Guoxin, and Hanyang Gao. "Raman Spectroscopic Characterization of Graphene." Applied Spectroscopy Reviews 45, no. 5 (September 17, 2010): 369–407. http://dx.doi.org/10.1080/05704928.2010.483886.

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Bonhommeau, Sébastien. "Special Issue on “Raman Spectroscopy for Chemical and Structural Characterization in Biology”." International Journal of Molecular Sciences 23, no. 19 (October 4, 2022): 11795. http://dx.doi.org/10.3390/ijms231911795.

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Sze, S. "Raman spectroscopic characterization of carbonaceous aerosols." Atmospheric Environment 35, no. 3 (2001): 561–68. http://dx.doi.org/10.1016/s1352-2310(00)00325-3.

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Ramirez-Mora, Tatiana, Claudia Dávila-Pérez, Fernando Torres-Méndez, and Grettel Valle-Bourrouet. "Raman Spectroscopic Characterization of Endodontic Biofilm Matrices." Journal of Spectroscopy 2019 (January 10, 2019): 1–7. http://dx.doi.org/10.1155/2019/1307397.

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Endodontic persistent infections are often mediated by bacterial biofilms. This mode of bacterial growth is characterized by the presence of a matrix mainly composed of extracellular polymeric substances (EPSs) that protect the encased microorganisms. To establish better control and disinfection protocols, elucidation of the main components of biofilm matrices present in endodontic infections is required. The aim of the present study was to characterize the principal components ofE. faecalis,A. naeslundii, and dual-species biofilm matrices by means of Raman spectroscopy and confocal scanning laser microscopy (CSLM) techniques. The total biomass of biofilms was quantified via crystal violet assays, and the monospecies biofilms showed higher biomass than the dual-species biofilms. Raman spectroscopy and confocal laser scanning microscopy were used to identify the biochemical composition and structure of the biofilm matrices. Spectra originating from the biofilms of two endodontic pathogens show the presence of carbohydrates, proteins, fatty acids, and nucleic acids in all samples; however, variation in the levels of expression of these biomolecules allows spectroscopic differentiation of the biofilms using principal component analysis. This study is the first attempt to identify the composition of monospecies and dual-species biofilms of endodontic origin. Our data provides an important approach to the understanding of molecular dynamics of endodontic infections.
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Hu, Kaiyue, Luigi Brambilla, Patrizia Sartori, Claudia Moscheni, Cristiana Perrotta, Lucia Zema, Chiara Bertarelli, and Chiara Castiglioni. "Development of Tailored Graphene Nanoparticles: Preparation, Sorting and Structure Assessment by Complementary Techniques." Molecules 28, no. 2 (January 5, 2023): 565. http://dx.doi.org/10.3390/molecules28020565.

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We present a thorough structural characterization of Graphene Nano Particles (GNPs) prepared by means of physical procedures, i.e., ball milling and ultra-sonication of high-purity synthetic graphite. UV-vis absorption/extinction spectroscopy, Dynamic Light Scattering, Transmission Electron Microscopy, IR and Raman spectroscopies were performed. Particles with small size were obtained, with an average lateral size <L> = 70–120 nm, formed by few <N> = 1–10 stacked layers, and with a small number of carboxylic groups on the edges. GNPs relatively more functionalized were separated by centrifugation, which formed stable water dispersions without the need for any surfactant. A critical reading and unified interpretation of a wide set of spectroscopic data was provided, which demonstrated the potential of Specular Reflectance Infrared Spectroscopy for the diagnosis and quantification of chemical functionalization of GNPs. Raman parameters commonly adopted for the characterization of graphitic materials do not always follow a monotonic trend, e.g., with the particle size and shape, thus unveiling some limitations of the available spectroscopic metrics. This issue was overcome thanks to a comparative spectra analysis, including spectra deconvolution by means of curve fitting procedures, experiments on reference materials and the exploitation of complementary characterization techniques.
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Ahern, Angela M., Paul R. Schwartz, and Lori A. Shaffer. "Characterization of Conversion-Coated Aluminum Using Fourier Transform Infrared and Raman Spectroscopies." Applied Spectroscopy 46, no. 9 (September 1992): 1412–19. http://dx.doi.org/10.1366/0003702924123764.

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Fourier transform infrared and Raman spectroscopies have been employed to define the molecular composition of chromium phosphate conversion coatings on aluminum. Attenuated total reflectance at 55° can be employed to probe the structure of conversion coatings present on aluminum at relatively high coating weights (≥23 mg Cr/m2). Both reflection-absorption infrared and surface-enhanced Raman spectroscopic techniques can discern the presence of conversion coatings at coverages as low as 9 mg Cr/m2. On the basis of the vibrational spectra from these techniques, we have determined that hydrated chromium phosphate is the major component in these conversion coatings on aluminum. Reflection-absorption infrared and surface-enhanced Raman spectroscopies also provide a means to determine the molecular structure of the nascent oxide layer on aluminum as a function of processing conditions. Specular reflection, attenuated total reflectance at 35°, diffuse reflectance, and Raman spectroscopic methods, in general, lack the surface sensitivity necessary to probe thin (≤23 mg/m2) inorganic films on aluminum.
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Sahu, Sumit Ranjan, Mayanglambam Manolata Devi, Puspal Mukherjee, Pratik Sen, and Krishanu Biswas. "Optical Property Characterization of Novel Graphene-X (X=Ag, Au and Cu) Nanoparticle Hybrids." Journal of Nanomaterials 2013 (2013): 1–9. http://dx.doi.org/10.1155/2013/232409.

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The present investigation reports new results on optical properties of graphene-metal nanocomposites. These composites were prepared by a solution-based chemical approach. Graphene has been prepared by thermal reduction of graphene oxide (GO) at 90°C by hydrazine hydrate in an ammoniacal medium. This ammoniacal solution acts as a solvent as well as a basic medium where agglomeration of graphene can be prevented. This graphene solution has further been used for functionalization with Ag, Au, and Cu nanoparticles (NPs). The samples were characterized by X-ray diffraction (XRD), Raman spectroscopy, UV-Vis spectroscopy, scanning electron microscopy (SEM), and transmission electron microscopy (TEM) to reveal the nature and type of interaction of metal nanoparticles with graphene. The results indicate distinct shift of graphene bands both in Raman and UV-Vis spectroscopies due to the presence of the metal nanoparticles. Raman spectroscopic analysis indicates blue shift of D and G bands in Raman spectra of graphene due to the presence of metal nanoparticles except for the G band of Cu-G, which undergoes red shift, reflecting the charge transfer interaction between graphene sheets and metal nanoparticles. UV-Vis spectroscopic analysis also indicates blue shift of graphene absorption peak in the hybrids. The plasmon peak position undergoes blue shift in Ag-G, whereas red shift is observed in Au-G and Cu-G.
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Wentrup-Byrne, E., L. Rintoul, J. L. Smith, and P. M. Fredericks. "Comparison of Vibrational Spectroscopic Techniques for the Characterization of Human Gallstones." Applied Spectroscopy 49, no. 7 (July 1995): 1028–36. http://dx.doi.org/10.1366/0003702953964813.

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A suite of human gallstones was investigated by vibrational spectroscopic techniques with a view to developing an effective characterization procedure. Using infrared microscopy, microspectroscopic mapping, infrared photoacoustic spectroscopy (PAS), and FT-Raman spectroscopy, we have examined both the chemical composition and the microstructure of the different categories of human gallstones. We show how infrared microscopy can be used to determine the chemical identity of particular microstructural features of a stone. Infrared mapping produces functional group maps of the surface of a gallstone and shows the actual distribution of the different chemical components. Good fluorescence-free FT-Raman spectra were obtained from all categories of stones except black stones, which gave a fluorescence background with no observable Raman spectrum. Of the vibrational techniques studied, PAS proved the most suited to the spectroscopic categorization of gallstones because data for the whole stone can be obtained with minimal sample preparation. The advantages and disadvantages of each technique are discussed.
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Wu, Zhangting, and Zhenhua Ni. "Spectroscopic investigation of defects in two-dimensional materials." Nanophotonics 6, no. 6 (March 11, 2017): 1219–37. http://dx.doi.org/10.1515/nanoph-2016-0151.

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AbstractTwo-dimensional (2D) materials have been extensively studied in recent years due to their unique properties and great potential for applications. Different types of structural defects could present in 2D materials and have strong influence on their properties. Optical spectroscopic techniques, e.g. Raman and photoluminescence (PL) spectroscopy, have been widely used for defect characterization in 2D materials. In this review, we briefly introduce different types of defects and discuss their effects on the mechanical, electrical, optical, thermal, and magnetic properties of 2D materials. Then, we review the recent progress on Raman and PL spectroscopic investigation of defects in 2D materials, i.e. identifying of the nature of defects and also quantifying the numbers of defects. Finally, we highlight perspectives on defect characterization and engineering in 2D materials.
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Dissertations / Theses on the topic "Raman spectroscopic characterization"

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Yerci, Selcuk. "Spectroscopic Characterization Of Semiconductor Nanocrystals." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12608177/index.pdf.

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Semiconductor nanocrystals are expected to play an important role in the development of new generation of microelectronic and photonic devices such as light emitting diodes and memory elements. Optimization of these devices requires detailed investigations. Various spectroscopic techniques have been developed for material and devices characterization. This study covers the applications of the following techniques for the analysis of nanocrystalline materials: Fourier Transform Infrared Spectroscopy (FTIR), Raman Spectroscopy, X-Ray Diffraction (XRD) and X-Ray Photoelectron (XPS). Transmission Electron Microscopy (TEM) and Secondary Ion Mass Spectrometry (SIMS) are also used as complementary methods. Crystallinity ratio, size, physical and chemical environment of the nanostructures were probed with these methods. Si and Ge nanocrystals were formed into the oxides Al2O3 and SiO2 by ion implantation, magnetron sputtering and laser ablation methods. FTIR and XPS are two methods used to extract information on the surface of the nanocrystals. Raman and XRD are non destructive and easy-to-operate methods used widely to estimate the crystallinity to amorphous ratio and the sizes of the nanocrystals. In this study, the structural variations of SiO2 matrix during the formation of Si nanocrystals were characterized by FTIR. The shift in position and changes in intensity of the Si-O-Si asymmetric stretching band of SiOx was monitored. An indirect metrology method based on FTIR was developed to show the nanocrystal formation. Ge nanocrystals formed in SiO2 matrix were investigated using FTIR, Raman and XRD methods. FTIR spectroscopy showed that Ge atoms segregate completely from the matrix at relatively low temperatures 900 oC. The stress between the Ge nanocrystals and the matrix can vary in samples produced by magnetron sputtering if the production conditions are slightly different. Si and Ge nanocrystals were formed into Al2O3 matrix by ion implantation of Si and Ge ions into sapphire matrix. Raman, XRD, XPS and TEM methods were employed to characterize the formed nanocrystals. XRD is used to estimate the nanocrystal sizes which are in agreement with TEM observations. The stress on nanocrystals was observed by Raman and XRD methods, and a quantitative calculation was employed to the Si nanocrystals using the Raman results. XPS and SIMS depth profiles of the sample implanted with Si, and annealed at 1000 oC were measured. Precipitation of Si atoms with the heat treatment to form the nanocrystals was observed using XPS. The volume fraction of the SiOx shell to the Si core in Si nanocrystals was found to be 7.9 % at projection range of implantation.
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Pullen, Aletha Marie. "Spectroscopic characterization of carbon based molecular electronic junctions." Connect to this title online, 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1099671322.

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Thesis (Ph. D.)--Ohio State University, 2004.
Title from first page of PDF file. Document formatted into pages; contains xvii, 208 p.; also includes graphics (some col.). Includes bibliographical references (p. 189-208).
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Shad, Farhad Ali. "Spectroscopic Identification and Characterization of Gemstone Minerals." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-450827.

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Since last few years, many artificial and modified gemstones are available whose origins are questionable and even an experienced gemmology expert may be unable to differentiate between these artificial gemstones. Raman spectroscopy is considered to be an effective method to differentiate natural and artificial gemstones as it involves a very simple sample preparation, is non-destructive in nature, and is sensitive, precise, and accurate. In the present study, Raman spectroscopy was employed to identify different gemstones available in the mineralogical collection at the Department of Earth Sciences, Uppsala University. Both precious and semiprecious gemstones like quartz, diamond, beryl, corundum, topaz and tourmaline were evaluated with the usage of a portable Raman spectrometer. The major objective of the present study was to characterize these gemstones and to identify their origin, whether these are natural or synthetic materials, by analysing and comparing Raman spectra. Shifts in dominant peak positions and widths(FWHM) for natural and synthetic samples were extracted in the course of fitting procedures and then compared with the RRUFF database. The variations of these parameters, studied both within the same variety of a gemstone, as well as in between different gemstone varieties, were found to be revealing in several ways. For example, it provided information about the internal residual stresses in quartz crystals, and about the instrumental effects on the spectra. Quartz samples of different colors, shapes, and origins (natural/synthetic) were analyzed. It was found that, within the resolution of this study, it would be difficult to differentiate between synthetic and natural non-metamorphic quartz. A higher resolution study, combined with a chemical analysis by electron microprobe, could possibly facilitate such differentiation. On the other hand, a highly-stressed metamorphic environment leaves an imprint in the crystal structure of quartz, which can be recognized by the Raman technique. For beryl varieties of gemstones, the results suggest that the synthetic crystals display slightly lower values of Raman shifts and smaller values of FWHMs as compared to their natura lcounterparts. This could possibly be used as a criterion for distinguishing between these two categories of beryl gemstones. The agreement between Raman spectra of green tourmalines and those of elbaite from the database was very good, justifying the elbaite identification. The strong correlation of peak positions and FWHMs of studied synthetic diamonds reveals that pressure-temperature and chemistry conditions of synthesis leave a distinct imprint on the crystal structure of diamond, thus making Raman spectroscopy a useful technique for investigating the origin of diamonds, for example detecting their laboratory-specific origin.
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Tan, Yan. "Raman spectroscopic study of induced pluripotent stem cells : characterization, identification, and discrimination." Thesis, University of British Columbia, 2012. http://hdl.handle.net/2429/40716.

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Raman microspectroscopy is a non-destructive, label-free technique that offers information-rich molecular analysis of living cells. This work is the first reported Raman spectroscopic study of human induced pluripotent cells (hiPSCs), a very promising new source of non-embryonic pluripotent stem cells for drug screening, toxicity assessment, regenerative therapies, and clinical research. The Raman signatures of hiPSCs and human embryonic stem cells (hESCs) were found to be highly similar, and both distinguishable from differentiated hESCs in terms of relative Raman peak intensities and variances. Principal component analysis (PCA) of the Raman spectra demonstrated a clear distinction between hiPSCs and differentiated hESCs. Additionally, the effects of culture confluencies and cell line differences on Raman spectra of hiPS cells was investigated. It was confirmed that the spectral similarity between hiPSCs and hESCs, along with the dissimilarity between hiPSCs and differentiated hESCs were qualitatively consistent over various cell culture confluencies, and between the two available hiPS cell lines. Therefore, the results suggested that the overall cellular composition of hiPSC was more similar to that of the hESC that these cells were designed to resemble than the somatics cell from which they were derived. It is suggested that the observed spectral differences between hiPSC and hESC may be due to factors relating to reprogramming (rather than cell density difference or cell line artifacts). Attempts were also made to investigate how Raman features of hiPS cells change during their differentiation. The pluripotent and differentiated iPSCs exhibited significantly different Raman spectral profiles; these differences were qualitatively similar to, but less marked, than differences between pluripotent and differentiated hESC. Overall, this work contributed important new data and practical insights into the utility of Raman microspectroscopy for characterization, identification, and discrimination of iPSCs and hESCs.
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Rosso, Kevin M. "Detection limits of CO₂in fluid inclusions using microthermometry and Raman spectroscopy and the spectroscopic characterization of CO₂." Thesis, Virginia Tech, 1994. http://hdl.handle.net/10919/40534.

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In many geologic environments, dominant1y aqueous solutions contain low concentrations of CO2. At ambient temperature, in fluid inclusions which trap these solutions, the typical phase assemblage consists of a CO2-rich vapor (where Pco2 = PintemaI) and an aqueous phase containing dissolved salts and CO2. In this study, the CO2 minimum detection limits (MDLs) using microthermometry and laser Raman spectroscopy are established in terms of Pco2 using synthetic H20-C02 inclusions. The purpose of the microthermometric experiments was to examine the diagnostic CO2 phase changes and determine the quantity of CO2 necessary to result in observable solid CO2 melting. The results of these experiments show that an observable solid CO2 melting event requires Pco2 ~ 45 bar at 25°C. The Raman spectroscopic detection limits were investigated using a multichannel Raman spectrometer. Because the Raman spectroscopic MDLs are a function of counts, the CO2 MDLs were determined by collecting signal-to-noise ratios for both the upper and lower V1-2V2 bands as a function of CO2 pressure (5-60 bars) and over a range of integration times and incident laser power to predict the optimal instrument settings. The resulting CO2 MDLs are on the 'order of 1 bar for our instrument. The band splitting of the v 1-2v2 diad as a function of CO2 pressure was measured up to 500 bar at ambient temperature. The CO2 pressures were converted to pc02 and the results are given in terms of the frequency separation between the upper and lower bands. These results are compared to those of previous studies. An analysis of the estimated errors indicates that the technique can be used to determine CO2 densities in fluid inclusions containing a homogenous, free CO2 phase to a precision of approximately ± 0.02 g/cm3• The temperature dependence of the intensity ratio of the hot bands to the v1-2v2 diad was measured from 270 to 315 K. The close agreement between the calculated and observed results indicate that laser induced sample heating is not significant. The intensity ratio can be used to estimate the CO2 temperature and, combined with the Raman density determination, allows calculation of the CO2 pressure.
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Rosso, Kevin Michael. "Detection limits of CO₂ in fluid inclusions using microthermometry and Raman spectroscopy and the spectroscopic characterization of CO₂ /." This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-01052009-091123/.

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Schäfer, Philipp. "Spectroscopic Characterization of DC Pulsed Sputtered Amorphous Silicon." Doctoral thesis, Universitätsbibliothek Chemnitz, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-165157.

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Im Rahmen dieser Arbeit werden Schichten und Schichtsyteme untersucht, die mittels D.C. gepulstem Magnetronzerstäuben abgeschieden wurden. Die Untersuchungen der Schichten erfolgen unter dem Gesichtspunkt der Eignung dieser Schichten als Kontaktschichten für photovoltaische Anwendungen. Eine detaillierte Studie der Schichteigenschaften wurde mit Hilfe von optischen Spektroskopiemethoden sowie elektrischen Messungen erstellt. Diese stellt die Zusammenhänge der Abscheideparameter, insbesondere der Substrattemperatur und der Wasserstoffflussrate bei der Abscheidung mit den Schichteigenschaften her. Des Weiteren werden die wechselseitigen Abhängigkeiten der Schichteigenschaften dargelegt. Hierbei wurde unter anderem gezeigt, dass der allgemein in der Literatur akzeptierte lineare Zusammenhang zwischen der Tauc-Lorentz Bandlücke und dem Wasserstoffgehalt nicht für alle Proben bestätigt werden konnte. Stattdessen wurde die Abhängigkeit der Bandlücke im Wesentlichen dem Anteil der polyhydrierten Siliziumatome innerhalb der Schicht zugeordnet. Für Teilmengen der Proben ergibt sich hieraus wieder eine nahezu lineare Abhängigkeit zwischen dem Wasserstoffgehalt und der Bandlücke. Im zweiten Teil der Arbeit werden Heterostruktur-Dioden untersucht, die sich an der Grenzfläche zwischen amorphem und kristallinem Silizium ausbilden. Dabei werden vordergründig die elektrischen Eigenschaften untersucht. Dies umfasst die Untersuchung der Abscheideparameter auf grenzflächennahe Defektzustände, die mittels Ladungstransientenspektroskopie (QTS) gefunden wurden. Zudem wird der begünstigende Einfluss des kristallinen Siliziumsubstrats auf die Ausbildung von mikrokristallinen Strukturen der aufwachsenden Schichten mittels ramanspektroskopischen Untersuchungen dargelegt.
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Sanoria, Abhishek [Verfasser], Matthias [Akademischer Betreuer] Rehahn, and Markus [Akademischer Betreuer] Busch. "Developing Raman microscopy as a routine spectroscopic technique for morphology and microstructure characterization of plastics / Abhishek Sanoria ; Matthias Rehahn, Markus Busch." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2016. http://d-nb.info/1122286317/34.

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Küpper, Sebastian [Verfasser], and Sebastian [Akademischer Betreuer] Schlücker. "Vibrational spectroscopic characterization of the photochromic molecule α-dinitrobenzylpyridine bypolarization-resolved linear and nonlinear Raman scattering / Sebastian Küpper ; Betreuer: Sebastian Schlücker." Duisburg, 2021. http://d-nb.info/1230322590/34.

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Antunez, de Mayolo Eduardo. "Study of the Optical Properties of sp2-Hybridized Boron Nitride." Thesis, Linköpings universitet, Tillämpad optik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-125738.

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Nitride-based semiconductor materials make it possible to fabricate optoelectronic devices that operate in the whole electromagnetic range, since the band gaps of these compounds can be modified by doping. Among these materials, the sp2-hybridized boron nitride has properties that make it a potential candidate for integration in devices operating in the short-wavelength limit, under harsh environment conditions, due to the strength of the B-N bond.  Nevertheless, this binary compound has been the less studied material among the nitrides, due to the lack of complete control on the growth process. This thesis is focused on the study of the optical properties of sp2-hybridized boron nitride grown by hot-wall chemical vapor deposition (CVD) method, at the Department of Physics, Chemistry and Biology, at Linköping University, Sweden. The samples received for this study were grown on c-plane aluminum nitride as the buffer layer, which in turn was grown by nitridation on c- plane oriented sapphire, as the substrate material. The first objective of the research presented in this thesis was the development of a suitable ellipsometry model in a spectral region ranging from the infrared to the ultraviolet zones of the electromagnetic spectrum, with the aim of obtaining in the process optical properties such as the index of refraction, the energy of the fundamental electronic interband transition, the frequencies for the optical vibrational modes of the crystal lattice, as well as their broadenings, and the numerical values of the dielectric constants; and on the other hand, structural parameters such as the layers thicknesses, and examine the possibility of the presence of roughness or porosity on the boron nitride layer, which may affect the optical properties, by incorporating their effects into the model. The determination of these parameters, and their relation with the growth process, is important for the future adequate design of heterostructure-based devices that incorporate this material. In particular, emphasis has been put on the modeling of the polar lattice resonance contributions, with the TO- LO model, by using infrared spectroscopic ellipsometry as the characterization technique to study the phonon behavior, in the aforementioned spectral region, of the boron nitride. On the other hand, spectroscopic ellipsometry in the visible-ultraviolet spectral range was used to study the behavior of the material, by combining a Cauchy model, including an Urbach tail for the absorption edge, and a Lorentz oscillator in order to account for the absorption in the material in the UV zone. This first step on the research project was carried out at Linköping University.  The second objective in the research project was to carry out additional studies on the samples received, in order to complement the information provided by the ellipsometry model and to improve the model itself, provided that it was possible. The characterization techniques used were X-ray diffraction, which made it possible to confirm that in fact boron nitride was present in the samples studied, and made it possible to verify the crystalline quality of the aforementioned samples, and in turn relate it to the quality of the ellipsometry spectra previously obtained; the Raman spectroscopy made it possible to further verify and compare the crystalline qualities of the samples received, as well as to obtain the frequency for the Raman active B-N stretching vibration in the basal plane, and to compare this value with that corresponding to the bulk sp2-boron nitride; scanning electron microscopy made it possible to observe the rough surface morphologies of the samples and thus relate them to some of the conclusions derived from the ellipsometry model; and finally cathodoluminescence measurements carried out at low temperature (4 K) allowed to obtain a broad band emission, on all the samples studied, which could be related to native defects inside the boron nitride layers, i.e., boron vacancies. Nevertheless, no trace of a free carrier recombination was observed. Considering that the hexagonal-boron nitride is nowadays considered to be a direct band gap semiconductor, it may be indirectly concluded, in principle, that the dominant phase present in the samples studied was the rhombohedral polytype. Moreover, it can be tentatively concluded that the lack of an observable interband recombination may be due to the indirect band gap nature of the rhombohedral phase of the boron nitride. Spectroscopic ellipsometry does not give a definite answer regarding this issue either, because the samples analyzed were crystalline by nature, thus not being possible to use mathematical expressions for the dielectric function models that incorporate the band gap value as a fitting parameter. Therefore, the nature of the band gap emission in the rhombohedral phase of the boron nitride is still an open research question. On the other hand, luminescent emissions originating from radiative excitonic recombinations were not observed in the cathodoluminescence spectra. This second step of the project was carried out at the Leroy Eyring Center for Solid State Science at Arizona State University.
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Books on the topic "Raman spectroscopic characterization"

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Kumar, Challa S. S. R., ed. Raman Spectroscopy for Nanomaterials Characterization. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-20620-7.

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service), SpringerLink (Online, ed. Raman Spectroscopy for Nanomaterials Characterization. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012.

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Bugay, David E. Pharmaceutical excipients: Characterization by IR, Raman, and NMR spectroscopy. New York: M. Dekker, 1999.

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Perkowitz, S. Optical characterization of semiconductors: Infrared, Raman, and photoluminescence spectroscopy. London: Academic Press, 1993.

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Tram, Pham Huynh. Fabrication and characterization of dilute nitride indium antimonide for long wavelength infrared applications. Hauppauge, N.Y: Nova Science Publishers, 2011.

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Graupner, R., and F. Hauke. Functionalization of single-walled carbon nanotubes: Chemistry and characterization. Edited by A. V. Narlikar and Y. Y. Fu. Oxford University Press, 2017. http://dx.doi.org/10.1093/oxfordhb/9780199533046.013.16.

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This article examines the chemical functionalization and structural alteration of single-walled carbon nanotubes (SWCNTs). It describes the covalent functionalization of the SWCNT framework that is the covalent attachment of functional entities onto the CNT scaffold. In particular, it considers the chemical modification and reactivity of SWCNTs in the context of the reactivity of graphite and fullerenes. It also discusses the defect and sidewall functionalization of SWCNTs, along with various techniques used in the characterization ofSWCNTs upon functionalization, namely: thermogravimetric analysis, spectroscopic techniques such as UV-Vis-NIR spectroscopy and Raman spectroscopy, and microscopic techniques like transmission electron microscopy, atomic force microscopy and scanning tunnelling microscopy.
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Eagan, Paige Elizabeth. Design, characterization, and optimization of an inexpensive raman spectroscopic system for sample identification. 2003.

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Fourier transform infrared and Raman spectroscopic characterization of homogeneous solution concentration gradients near a container wall at different temperatures. Huntsville, AL: Dept. of Chemistry, the University of Alabama in Huntsville, 1991.

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Raman Spectroscopy For Nanomaterials Characterization. Springer, 2012.

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Challa S.S.R. Kumar. Raman Spectroscopy for Nanomaterials Characterization. Springer, 2016.

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Book chapters on the topic "Raman spectroscopic characterization"

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Tomar, Vikas, Tao Qu, Devendra K. Dubey, Devendra Verma, and Yang Zhang. "Spectroscopic Experiments: A Review of Raman Spectroscopy of Biological Systems." In Multiscale Characterization of Biological Systems, 5–20. New York, NY: Springer New York, 2015. http://dx.doi.org/10.1007/978-1-4939-3453-9_2.

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Wells, M. A., and E. R. Ramanaidou. "Raman Spectroscopic Core Scanning for Iron Ore and BIF Characterization." In Springer Geochemistry/Mineralogy, 387–96. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-13948-7_39.

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Long, Wang, Wen Liang-ying, Tu ia-jia, Zhang heng-fu, and Bai Cheng-guang. "FTIR and Raman Spectroscopic Investigation on the Structure of CaO-SiO2-TiO2Ternary Slags." In Characterization of Minerals, Metals, and Materials 2014, 1–10. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118888056.ch1.

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Monti, P., G. Freddi, M. Tsukada, A. Bertoluzza, and T. Asakura. "Spectroscopic characterization of Bombyx mori silk fibroin: Raman spectrum of Silk I." In Spectroscopy of Biological Molecules: New Directions, 81–82. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-011-4479-7_38.

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Terner, James, Andrew J. Sitter, and John R. Shifflett. "Resonance Raman Spectroscopic Characterization of the Oxidation of the Horseradish Peroxidase Active Site." In Charge and Field Effects in Biosystems—2, 31–42. Boston, MA: Springer US, 1989. http://dx.doi.org/10.1007/978-1-4613-0557-6_4.

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Garbowski, E., and G. Coudurier. "Raman Spectroscopy." In Catalyst Characterization, 45–60. Boston, MA: Springer US, 1994. http://dx.doi.org/10.1007/978-1-4757-9589-9_3.

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Lee, Sanghwa, and Jun Ki Kim. "Label-Free Raman Spectroscopic Techniques with Morphological and Optical Characterization for Cancer Cell Analysis." In Advances in Experimental Medicine and Biology, 385–99. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-6064-8_14.

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Li, Fei, Xiao Ping Zou, Jin Cheng, Hong Dan Zhang, Peng Fei Ren, Guang Zhu, and Mao Fa Wang. "Raman Spectroscopic Characterization of Carbon Nanofibers Obtained by Using Metal Chloride as Catalyst Precursor." In Materials Science Forum, 1387–90. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-462-6.1387.

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Esser, Norbert, and Jean Geurts. "Raman Spectroscopy." In Optical Characterization of Epitaxial Semiconductor Layers, 129–202. Berlin, Heidelberg: Springer Berlin Heidelberg, 1996. http://dx.doi.org/10.1007/978-3-642-79678-4_4.

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Li, Fei, Xiao Ping Zou, Jin Cheng, Hong Dan Zhang, Peng Fei Ren, Guang Zhu, and Mao Fa Wang. "Raman Spectroscopic Characterization for Carbon Nanofibers Produced by Using Ferric Chloride of Different Concentration as Catalyst Precursor." In Advanced Materials Research, 809–12. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-463-4.809.

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Conference papers on the topic "Raman spectroscopic characterization"

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Popp, J., B. Dietzek, M. Schmitt, C. Krafft, R. Möller, P. Rösch, P. M. Champion, and L. D. Ziegler. "Raman Spectroscopic Characterization of Single Cells." In XXII INTERNATIONAL CONFERENCE ON RAMAN SPECTROSCOPY. AIP, 2010. http://dx.doi.org/10.1063/1.3482424.

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Wolthuis, Rolf, Matthijs van Aken, Hajo A. Bruining, and Gerwin J. Puppels. "Raman spectroscopic characterization of the liver." In BiOS '99 International Biomedical Optics Symposium, edited by Michael D. Morris. SPIE, 1999. http://dx.doi.org/10.1117/12.345391.

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Popp, J., S, Stöckel, S. Meisel, T. Bocklitz, W. Schumacher, M. Putsche, and P. Rösch. "Raman spectroscopic characterization of single cells." In BiOS, edited by Anita Mahadevan-Jansen and Wolfgang Petrich. SPIE, 2010. http://dx.doi.org/10.1117/12.855827.

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Kamnev, A. A., and A. V. Tugarova. "Intracellular transformations in bacteria as a response to external factors: molecular spectroscopic characterization." In 2nd International Scientific Conference "Plants and Microbes: the Future of Biotechnology". PLAMIC2020 Organizing committee, 2020. http://dx.doi.org/10.28983/plamic2020.110.

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Luna-Pineda, Tatiana, Kristina Soto-Feliciano, Edwin De La Cruz-Montoya, Leonardo C. Pacheco Londoño, Carlos Ríos-Velázquez, and Samuel P. Hernández-Rivera. "Spectroscopic characterization of biological agents using FTIR, normal Raman and surface-enhanced Raman spectroscopies." In Defense and Security Symposium, edited by Augustus W. Fountain III. SPIE, 2007. http://dx.doi.org/10.1117/12.720338.

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O’Shea, Stephen, Bradford Bourque, Harold Pomeroy, Nancy Breen, P. M. Champion, and L. D. Ziegler. "Resonance Raman Spectroscopic Characterization of Live Clownfish (Amphiprion Ocellaris) and their Eggs." In XXII INTERNATIONAL CONFERENCE ON RAMAN SPECTROSCOPY. AIP, 2010. http://dx.doi.org/10.1063/1.3482879.

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Wang, Chih-Hsien, Wenlung Chen, P. M. Champion, and L. D. Ziegler. "Raman Spectroscopic Characterization of Secondary Structure of δ-Crystallin Isolated from Mule Duck." In XXII INTERNATIONAL CONFERENCE ON RAMAN SPECTROSCOPY. AIP, 2010. http://dx.doi.org/10.1063/1.3482551.

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Kayama, M., A. Gucsik, H. Nishido, K. Ninagawa, A. Tsuchiyama, and Arnold Gucsik. "Cathodoluminescence and Raman Spectroscopic Characterization of Experimentally Shocked Plagioclase." In MICRO-RAMAN SPECTROSCOPY AND LUMINESCENCE STUDIES IN THE EARTH AND PLANETARY SCIENCES: Proceedings of the International Conference Spectroscopy 2009. AIP, 2009. http://dx.doi.org/10.1063/1.3222897.

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Shin, Hsiao Hsin, Yan Sheng Tsai, Tao Yuan Wang, Shou Chia Chu, and Huihua Kenny Chiang. "Raman spectroscopic characterization on cervical neoplasm in biopsy direction." In Biomedical Optics (BiOS) 2007, edited by Tuan Vo-Dinh, Warren S. Grundfest, David A. Benaron, Gerald E. Cohn, and Ramesh Raghavachari. SPIE, 2007. http://dx.doi.org/10.1117/12.700050.

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Rekha, P., P. Aruna, Amuthachelvi Daniel, S. Wilfred Prasanna, K. UdayaKumar, S. Ganesan, G. Bharanidharan, and Balu David. "Raman spectroscopic characterization of blood plasma of oral cancer." In 2013 IEEE 4th International Conference on Photonics (ICP). IEEE, 2013. http://dx.doi.org/10.1109/icp.2013.6687092.

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Reports on the topic "Raman spectroscopic characterization"

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Clausen, Jay, Richard Hark, Russ Harmon, John Plumer, Samuel Beal, and Meghan Bishop. A comparison of handheld field chemical sensors for soil characterization with a focus on LIBS. Engineer Research and Development Center (U.S.), February 2022. http://dx.doi.org/10.21079/11681/43282.

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Abstract:
Commercially available handheld chemical analyzers for forensic applications have been available for over a decade. Portable systems from multiple vendors can perform X-ray fluorescence (XRF) spectroscopy, Raman spectroscopy, Fourier transform infrared(FTIR) spectroscopy, and recently laser-induced breakdown spectroscopy (LIBS). Together, we have been exploring the development and potential applications of a multisensor system consisting of XRF, Raman, and LIBS for environmental characterization with a focus on soils from military ranges. Handheld sensors offer the potential to substantially increase sample throughput through the elimination of transport of samples back to the laboratory and labor-intensive sample preparation procedures. Further, these technologies have the capability for extremely rapid analysis, on the order of tens of seconds or less. We have compared and evaluated results from the analysis of several hundred soil samples using conventional laboratory bench top inductively coupled plasma atomic emission spectroscopy (ICP-AES) for metals evaluation and high-performance liquid chromatography (HPLC) and Raman spectroscopy for detection and characterization of energetic materials against handheld XRF, LIBS, and Raman analyzers. The soil samples contained antimony, copper, lead, tungsten, and zinc as well as energetic compounds such as 2,4,6-trinitrotoluene(TNT), hexahydro-1,3,5-triazine (RDX), nitroglycerine (NG), and dinitrotoluene isomers (DNT). Precision, accuracy, and sensitivity of the handheld field sensor technologies were compared against conventional laboratory instrumentation to determine their suitability for field characterization leading to decisional outcomes.
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Nguyen, Vy H. T. Scanning Angle Raman spectroscopy in polymer thin film characterization. Office of Scientific and Technical Information (OSTI), December 2015. http://dx.doi.org/10.2172/1409182.

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Derry, Robert. Characterization of Zinc-containing Metalloproteins by Resonance Raman Spectroscopy. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.2164.

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Cunningham, J. M. Characterization of high-temperature superconductor film layers using Raman Spectroscopy. Office of Scientific and Technical Information (OSTI), April 1999. http://dx.doi.org/10.2172/8941.

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Ager III, Joel W. Raman Spectroscopy Characterization of amorphous carbon coatings for computer hard disks. Office of Scientific and Technical Information (OSTI), May 1998. http://dx.doi.org/10.2172/767498.

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Velev, Orlin D., Eric W. Kaler, and Abraham M. Lenhoff. Characterization and Optimization of Novel Nanostructured Metallic Substrates for Surface Enhanced Raman Spectroscopy. Fort Belvoir, VA: Defense Technical Information Center, December 2001. http://dx.doi.org/10.21236/ada398973.

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Tallant, D. R., T. J. Headley, J. W. Medernach, and F. Geyling. Characterization of polysilicon films by Raman spectroscopy and transmission electron microscopy: A comparative study. Office of Scientific and Technical Information (OSTI), November 1993. http://dx.doi.org/10.2172/10118607.

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Behbod, Fariba. Laser Raman Tweezer Spectroscopy for the Molecular and Functional Characterization of Single Live Mouse Mammary Tumor-Initiating Cells. Fort Belvoir, VA: Defense Technical Information Center, April 2012. http://dx.doi.org/10.21236/ada562457.

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Sheng, Dai, and B. Gu. A New Method for In-situ Characterization of Important Actinides and Technetium Compounds via Fiberoptic Surface Enhanced Raman Spectroscopy (SERS). Office of Scientific and Technical Information (OSTI), September 2005. http://dx.doi.org/10.2172/893264.

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Dai, Sheng, and B. Gu. A New Method for In-situ Characterization of Important Actinides and Technetium Compounds via Fiberoptic Surface Enhanced Raman Spectroscopy (SERS). Office of Scientific and Technical Information (OSTI), June 2002. http://dx.doi.org/10.2172/834954.

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