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Tesi sul tema "Raman spectrosopy"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 12 febbraio 2022

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1

Li, Yun-Thai. "Tip-enhanced Raman spectroscopy." Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.609992.

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2

Cancado, Luiz Gustavo de Oliveira Lopes. "Raman spectroscopy of nanographites." Universidade Federal de Minas Gerais, 2006. http://hdl.handle.net/1843/IACO-6W8NYM.

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This work presents the application of the Raman spectroscopy for the study and characterization of nanographite systems. We report the ¯rst detection of nanographite ribbons on a highly oriented pyrolytic graphite substrate by Raman spectroscopy. We found a way to di®erentiate the Raman signal of the ribbon from that of the substrate, the Raman signal of the ribbon having the same order of magnitude as the one of the substrate, despite the much smaller number of illuminated carbon atoms (»10¡3). The results show that these structures present van Hove singularities in the electronic density of

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3

Bergqvist, Saga. "Raman spectroscopy in neurosurgery." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-78665.

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Brain tumors or brain cancer is a disease than affects people of all ages. The median age of a person living with a brain tumor is 60 years, it is however a disease that affects children and young adults in high grade. Brain cancer is the second most common type of cancer among children and is also the most common cause of cancer related death among this group. To ensure that the damages on the brain is as small as possible, it is important that a tumor can be diagnosed and removed as early as possible. Previous methods of diagnosis is based on biopsy where a part of the tumor is removed and e

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4

Patil, Raj. "Deep UV Raman Spectroscopy." Thesis, The University of Arizona, 2016. http://hdl.handle.net/10150/613378.

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This thesis examines the performance of a custom built deep UV laser (257.5nm) for Raman spectroscopy and the advantages of Raman spectroscopy with a laser in the deep UV over a laser in the visible range (532 nm). It describes the theory of resonance Raman scattering, the experimental setup for Raman spectroscopy and a few Raman spectroscopy measurements. The measurements were performed on biological samples oak tree leaf and lactobacillus acidophilus and bifidobacteria from probotioc medicinal capsules. Fluorescence free Raman spectra were acquired for the two samples with 257.5 nm laser. Th

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5

Nathaniel, Todd. "Spatial heterodyne Raman spectroscopy." Thesis, University of Surrey, 2011. http://epubs.surrey.ac.uk/810642/.

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6

Castillo, Carolina Graciela. "Biological applications of raman spectroscopy." Diss., Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/30414.

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7

McGoverin, Cushla Maree, and n/a. "Raman spectroscopy of complex mixtures." University of Otago. Department of Chemistry, 2008. http://adt.otago.ac.nz./public/adt-NZDU20081103.112612.

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This thesis presents several Raman spectroscopic studies of bovine milk-derived products (skim and whole milk powder, anhydrous milk fat, processed cheese and soy cheese made from milk protein). Raman spectroscopy, unlike infrared spectroscopy (both mid- and near-infrared), has not been widely used as an analytical tool within the dairy industry. The purpose of this project was to assess the utility of Raman spectroscopy in several dairy industry relevant problems. FT-Raman spectroscopy coupled with partial least squares (PLS) reliably predicted the concentration of fat and protein within whol

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8

O'Grady, Noelle Antoinette. "Raman spectroscopy of fluorescent samples." Thesis, Queen's University Belfast, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.246542.

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9

Weigel, Alexander. "Femtosecond stimulated resonance Raman spectroscopy." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2011. http://dx.doi.org/10.18452/16302.

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Femtosekundenaufgelöste Ramanspektroskopie ist ein leistungsfähiges Werkzeug, um die Schwingungsentwicklung eines angeregten Chromophors in Echtzeit zu studieren. In dieser Arbeit wurde ein durchstimmbares Ramanspektrometer mit 10 cm-1 spektraler und 50--100 fs zeitlicher Auflösung entwickelt und für eine Anwendung auf flavinbasierte Photorezeptoren optimiert. Es wird der Einfluß der Resonanzbedingungen auf das transientes Ramanspektrum charakterisiert. Die Dynamik des angeregten Zustandes wird zuerst für den Modellphotoschalter Stilben untersucht, ausgehend sowohl vom cis-, als auch vom tran

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10

Thomson, Grant. "Forensic applications of Raman spectroscopy." Thesis, University of Leeds, 2002. http://etheses.whiterose.ac.uk/395/.

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The forensic applications of Raman spectroscopy have been explored and extended using the development of novel sampling techniques and task-specific instrumentation described in this thesis. The phenomenon of Raman scattering, enhanced Raman scattering and their relevance in forensic investigations was reviewed. Particular emphasis was placed on current applications, experimental considerations relevant to in-situ Raman sampling and the deficiencies of instrumentation commercially available at the time. It was concluded that the development of novel, optimised instrumentation was essential in

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11

Lee, Nam-Heui. "Extending Raman spectroscopy to the nanoscale." Akron, OH : University of Akron, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=akron1172680006.

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Dissertation (Ph. D.)--University of Akron, Dept. of Polymer Science, 2007.<br>"May, 2007." Title from electronic dissertation title page (viewed 04/07/2008) Advisor, Mark D. Foster; Committee members, Alexei P. Sokolov, Darrell H. Reneker, Ali Dhinojwala, Rex D. Ramsier; Department Chair, Mark D. Foster; Dean of the College, George R. Newkome; Dean of the Graduate School, George R. Newkome. Includes bibliographical references.

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12

U, Mahaboob Pasha. "Raman spectroscopy of BaTiO3 based ceramics." Thesis, University of Sheffield, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.527217.

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13

Freihofer, Gregory J. "Enhancing CNT-composites with Raman spectroscopy." Master's thesis, University of Central Florida, 2011. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4763.

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Carbon Nanotubes (CNTs) have been the subject of intense research for their potential to improve a variety of material properties when developed as nano-composites. This research aims to address the challenges that limit the ability to transfer the outstanding nano-scale properties of CNTs to bulk nano-composites through Raman characterization.These studies relate the vibrational modes to microstructural characterization of CNT composites including stress, interface behavior, and defects. The formulation of a new fitting procedure using the pseudo-Voigt function is presented and shown to minim

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14

Boyce, Paul John. "Raman spectroscopy of II-VI semiconductors." Thesis, University of East Anglia, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.357210.

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15

Hard, Andrew Philip. "Sensing and analysis with Raman spectroscopy." Thesis, University of East Anglia, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.268552.

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16

Gil, Gustavo Adolfo. "Online Raman spectroscopy for bioprocess monitoring." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/36757.

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Thesis (M. Eng. and S.B.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2005.<br>Author received the S.B. degree, June 2005 and the M. Eng. degree, Sept. 2005.<br>Includes bibliographical references (p. 195-202).<br>Online monitoring of bioprocesses is essential to expanding the potential of biotechnology. In this thesis, a system to estimate concentrations of chemical components of an Escherichia Coli fermentation growth medium via a remote fiber-optic Raman spectroscopy probe was studied in depth. The system was characterized to determine sourc

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17

Chau, Alexandra H. (Alexandra Hung) 1980. "Development of an intracoronary Raman spectroscopy." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/49757.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2009.<br>Includes bibliographical references (p. 167-177).<br>Atherosclerosis is a leading cause of death in the United States, with 1 in 5 deaths (500,000 annually) attributable to coronary artery disease alone. While the disease processes are not completely understood, it is believed that patient risk depends on a variety of factors including lesion structure, biomechanical behavior, and morphological and chemical composition. Raman spectroscopy, based on spectral analysis of inelastically scattered phot

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18

Farhat, Hootan. "Raman spectroscopy of metallic carbon nanotubes." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/59217.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2010.<br>Includes bibliographical references (p. 101-108).<br>Metallic carbon nanotubes are one dimensional conductors that are both technologically promising for electronic applications, and scientifically interesting for studying the physics of low dimensional materials. In this thesis, we present a detailed study of the inelastic light scattering (Raman) spectrum of individual metallic carbon nanotubes, with a focus on the influence of electronic excitations and charged carriers. We have demo

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19

Wattanavichean, N. "Raman spectroscopy of molecular electronic junctions." Thesis, University of Liverpool, 2017. http://livrepository.liverpool.ac.uk/3006908/.

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Molecular Electronics uses molecules sandwiched between two metals as a model system to create tailored solutions for applications such as energy harvesting and sensing. Electrons tunnelling across such a junction are a↵ected by the properties of the molecule itself as well as the interaction between metal and molecule. In particular, charge transport is known to couple to molecular vibrations, which can act both to dissipate energy as well as increase conductance. This thesis therefore applies in-situ vibrational spectroscopies, surface-enhanced Raman scattering and vibrational sum frequency

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20

Wang, Peng. "Micro-Raman spectroscopy of GaAs nanowires." Paris 6, 2012. http://www.theses.fr/2012PA066482.

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Cette thèse présente une étude de micro spectroscopie Raman d’un type nouveau de nanostructures : les nanofils de semiconducteurs. Elle porte sur des nanofils de GaAs, d’un diamètre compris entre 50 et 150 nm, fabriqués par épitaxie par jets moléculaires. Il s’agit de la première étude systématique des modes de vibration et des résonances électroniques associées dans les deux formes cristallines qui peuvent être obtenues suivant les conditions de croissance : la blende de zinc comme pour GaAs massif et la WZ qui n’existe pas à l’état massif. La spectroscopie est réalisée sur un nanofil unique

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21

Fryling, Mark Aaron. "Raman Spectroscopy of Carbon Electrode surfaces /." The Ohio State University, 1994. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487859313346783.

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22

Haydock, Richard. "Multivariate analysis of Raman spectroscopy data." Thesis, University of Nottingham, 2015. http://eprints.nottingham.ac.uk/30697/.

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This thesis is concerned with developing techniques for analysing Raman spectroscopic images. A Raman spectroscopic image differs from a standard image as in place of red, green and blue quantities for each pixel a Raman image contains a spectrum of light intensities at each pixel. These spectra are used to identify the chemical components from which the image subject, for example a tablet, is comprised. The study of these types of images is known as chemometrics, with the majority of chemometric methods based on multivariate statistical and image analysis techniques. The work in this thesis h

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23

Hart, Prieto Maria Consuelo. "Applications of Raman spectroscopy to urology." Thesis, Cranfield University, 2006. http://dspace.lib.cranfield.ac.uk/handle/1826/8540.

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Raman spectroscopy is an optical technique that can interrogate biological tissues. In doing so it gives us an understanding of the changes in the molecular structure that are associated with disease development. The Kerr gating technique uses a picosecond pulsed laser and fast temporal gating of inelastically (Raman) scattered light. The tissue samples used were taken following fully informed consent and ethics approval. Bladder samples were obtained by taking a biopsy during a TURBT or TURP, prostate samples were taken during TURP and the liver and kidney (pigs) were bought at a supermarket.

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24

Guo, Yu. "RAMAN SPECTROSCOPY OF GLASSESWITH HIGH AND BROAD RAMAN GAIN IN THE BOSON PEAK REGION." Doctoral diss., University of Central Florida, 2006. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4275.

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This thesis investigates Raman spectra of novel glasses and their correlation with structure for Raman gain applications. Raman gain for all-optical amplification by fibers depends significantly on the cross section for spontaneous Raman scattering allowing to compare signal strength and spectral coverage. We also investigate the relationship between glass structure and the Boson peak (enhancement of the low-frequency vibrational density of states) and report new inelastic neutron scattering spectra for niobium-phosphate glasses. Polarization resolved Raman spectra of glasses based on tellurit

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25

Werninghaus, Thomas. "Micro-Raman Spectroskopy Investigation of Hard Coatings." Doctoral thesis, Universitätsbibliothek Chemnitz, 1999. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-199900407.

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Abstract: MicroRaman Spectroscopy Investigation of Hard Coatings Diamond, silicon carbide, and boron nitride have attracted great interest in the last years, due to their excellent material properties. Especially the extreme hardness and the high thermal con ductivity of these materials favour them as protective layers. The very large hardness gave these materials, deposited as films on various substrates, their name: hard coatings. In contrast to di amond, silicon carbide and boron nitride can be n as well as pdoped, making them promising candidates for high speed and high tempera

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26

Bauer, Michael. "Raman spectroscopy of laser induced material alterations." Diss., lmu, 2010. http://nbn-resolving.de/urn:nbn:de:bvb:19-117196.

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27

Brocke, Thomas. "Electronic Raman spectroscopy on semiconductor quantum dots." Göttingen Cuvillier, 2007.

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28

Koljenovic, Senada. "Towards clinico-pathological application of Raman spectroscopy." [S.l.] : Rotterdam : [The Author] ; Erasmus University [Host], 2008. http://hdl.handle.net/1765/11739.

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29

Tatham, Martin Christopher. "Time resolved Raman spectroscopy of semiconductor structures." Thesis, University of Oxford, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.305429.

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30

Agaiby, Rouzet Michael Behnam. "Nanometer Scale Strain Characterisation Using Raman Spectroscopy." Thesis, University of Newcastle Upon Tyne, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.506504.

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31

Barrett, L. J. "Raman spectroscopy of illicit drugs and pharmaceuticals." Thesis, Queen's University Belfast, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.269165.

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32

Bennett, Robert. "New development in Fourier transform Raman spectroscopy." Thesis, University of Southampton, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.242461.

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33

Claps, Ricardo Javier. "Novel developments in laser diode raman spectroscopy /." Digital version accessible at:, 2000. http://wwwlib.umi.com/cr/utexas/main.

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34

CRUZ, JOSE FLAVIO MARTINS. "CARACTEREZITION OF GASOLINES BY FT-RAMAN SPECTROSCOPY." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2003. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=4333@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>Visando determinar os teores dos componentes relevantes e as propriedades físicas de gasolinas comerciais e sintéticas foram tomados espectros Raman de 60 gasolinas comerciais e 52 misturas sintéticas simulando gasolinas. Os espectros foram tomados em um espectrômetro Nicolet FT Raman 950. Os espectros brutos obtidos foram tratados para evitar a influência da variabilidade de potência do laser excitante sobre as intensidades das linhas Raman. As variáveis independentes (intensidades Raman ) e as variáveis dependentes (propriedades d

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35

Zelai, Taharh. "Nanoscale Raman spectroscopy of graphene nanodevice structures." Thesis, University of Southampton, 2017. https://eprints.soton.ac.uk/419483/.

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Graphene is an atomically-thin 2-dimentional layer of carbon atoms. Since 2004, it has been attracting significant attention for various type of device applications due to its unique properties. In particular, applications of graphene for micro- and nanoscale devices is one of the most demanded and promising research fields. For further advancement of technological flexibility in designing graphene nanodevices, introducing defects to graphene could be a useful method to modify its material properties. Therefore, how to control defects in graphene and how to observe the effects of defects are o

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36

Son, HyungBin 1981. "Raman spectroscopy of single wall carbon nanotubes." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/44725.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2008.<br>Includes bibliographical references (p. 71-76).<br>A single wall carbon nanotube (SWNT) is a new form of carbon, whose atomic arrangement is equivalent to a graphene sheet rolled into a cylinder in a seamless way. The typical diameter of a SWNT ranges from 0.6 nm to several nm and the typical length ranges from tens of nm to several cm. Due to its small diameter and high aspect ratio, a SWNT has very unique electronic and vibrational properties. The goals of this thesis work a

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37

Oh, Jeankun 1968. "Transcutaneous measurement of glucose using Raman spectroscopy." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/27121.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2004.<br>Includes bibliographical references (p. 86-88).<br>Transcutaneous glucose measurement would provide the ability to obtain frequent measurements without the pain and risk of infection associated with obtaining a blood sample and eliminates the need for reagents. Because of these potential benefits, a large effort is being made within the academic and industrial research communities to develop alternative rapid and easily manageable analysis methods, including transcutaneous methods. Several optical t

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38

Bhatia, Pankaj 1974. "Using Raman spectroscopy to study supercritical CO₂." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/85310.

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39

Dyer, Christopher David. "Chemical applications of Fourier-transform Raman spectroscopy." Thesis, University of Southampton, 1995. https://eprints.soton.ac.uk/424218/.

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Details are presented of five studies in the application of Fourier transform (FT) Raman spectroscopy. The studies encompass a diverse range of chemical species, and indicate the wide applicability of FT-Raman methods. A series of coloured sulphur-containing organic compounds based on the thione ring structure were analysed. Characteristic group frequencies were determined, enabling the thione ring structure to be easily identified. Spectral changes on reaction of thiones or related oxones to yield tetrathiafulvalenes (TTFs) were discovered, whilst the differentiation of thione and oxone speci

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40

Werninghaus, Thomas. "Micro-Raman Spectroskopy Investigation of Hard Coatings." Doctoral thesis, Verlag: Als Manuskript gedruckt im SHAKER Verlag Aachen;ISBN 3-8265-3110-8, 1997. https://monarch.qucosa.de/id/qucosa%3A17562.

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Abstract: MicroRaman Spectroscopy Investigation of Hard Coatings Diamond, silicon carbide, and boron nitride have attracted great interest in the last years, due to their excellent material properties. Especially the extreme hardness and the high thermal con ductivity of these materials favour them as protective layers. The very large hardness gave these materials, deposited as films on various substrates, their name: hard coatings. In contrast to di amond, silicon carbide and boron nitride can be n as well as pdoped, making them promising candidates for high speed and high tempera

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41

Touzalin, Thomas. "Tip-enhanced Raman spectroscopy on electrochemical systems." Thesis, Sorbonne université, 2018. http://www.theses.fr/2018SORUS364.

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L'analyse in situ d'interfaces électrochimiques à l'échelle nanométriques est un enjeu majeur pour la compréhension des mécanismes de transferts de charges et d'électrons dans les domaines du stockage d'énergie ou de l'électrocatalyse. Ce travail a permis le développement de la spectroscopie Raman exaltée de pointe (TERS) en milieu liquide et en conditions électrochimiques. Le TERS permet l'analyse de la structure de molécules ou de matériaux à l'échelle nanométrique du fait de l'exaltation localisée du champ électrique à l'extrémité d'une sonde de microscope à effet tunnel (STM) en or ou en a

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42

Viranna, Narendra Balaguru. "Coherent anti-Stokes Raman spectroscopy of diamond." Master's thesis, University of Cape Town, 1997. http://hdl.handle.net/11427/26229.

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Experiments were performed to investigate Coherent Anti-Stokes Raman Scattering (CARS) in diamond. Aspects of this type of non-linear scattering are presented theoretically, and various experimental configurations were attempted in order to study them. These included the dependence of the CARS signal intensity on the intensities of the two exciting frequency-doubled Nd:YAG (pump) and dye (Stokes) lasers, the variation of the CARS signal polarization as a function of the lasers' polarization, and the dependence of the CARS signal intensity on the phase mismatch of the laser beams. The phase mis

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43

Scherzer, Ryan D. "Degradation Resistant Surface Enhanced Raman Spectroscopy Substrates." UNF Digital Commons, 2017. http://digitalcommons.unf.edu/etd/760.

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Raman spectroscopy is employed by NASA, and many others, to detect trace amounts of substances. Unfortunately, the Raman signal is generally too weak to detect when very small, but non-trivial, amounts of molecules are present. One way around this weak signal is to use surface enhanced Raman spectroscopy (SERS). When used as substrates for SERS, metallic nanorods grown using physical vapor deposition (PVD) provide a large enhancement factor to the Raman signal, as much as 1012. However, Silver (Ag) nanorods that give high enhancement suffer from rapid degradation as a function of time and expo

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44

Maltt, N. D. "Diagnosis of lung cancer by raman spectroscopy." Thesis, Queen's University Belfast, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.492488.

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lung cancer patients from 'at risk' controls and 'at risk' control subjects from healthy control subjects. Porphyrin-containing substances were higher in the 'at risk' controls than either the healthy controls or the lung cancer patients. Additionally the induced sputum from the three groups was analysed using Surface-enhanced Desorption-Ionization Time-of-flight mass spectrometry which also distinguished the three groups. A mini fibre optic probe was used in conjunction with shifted subtracted Raman spectroscopy to analyse normal and malignant ex vivo lung tissue from 7 patients, obtained fro

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45

Atkins, Chad Garry. "Raman spectroscopy of transfusable red blood cells." Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/59728.

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Blood banking is an essential aspect of modern healthcare. When red blood cells (RBCs) are stored, they degrade over time as a result of various chemical and biological processes leading to an accumulation of waste products and oxidative damage, among others. Significant growth in the application of Raman spectroscopy (RS) to biomedical problems has made it a feasible tool for investigating biochemical changes associated with storage of RBCs. It was hypothesized that RS could be used to monitor in situ, non-destructively and non-invasively, certain structural and compositional changes associat

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46

Lloyd, Jonathan S. "The development of tip enhanced raman spectroscopy." Thesis, Swansea University, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.678427.

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47

Liu, Xiaohua. "Resonance raman studies of hemoproteins." Thesis, Georgia Institute of Technology, 1989. http://hdl.handle.net/1853/27170.

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48

Beaman, R. A. "Two beam coherent spectroscopy." Thesis, Cardiff University, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.379609.

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49

Wiley, James Hugh. "Raman spectra of celluloses." Diss., Georgia Institute of Technology, 1986. http://hdl.handle.net/1853/5748.

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Grantier, David Raymond. "Chemically induced raman scattering." Diss., Georgia Institute of Technology, 1996. http://hdl.handle.net/1853/30321.

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