Bibliographies thématiques / Spectrosocpy

Littérature scientifique sur le sujet « Spectrosocpy »

Auteur : Grafiati
Publié le 25 mai 2024

Créez une référence correcte selon les styles APA, MLA, Chicago, Harvard et plusieurs autres

Choisissez une source :

Sommaire

Consultez les listes thématiques d’articles de revues, de livres, de thèses, de rapports de conférences et d’autres sources académiques sur le sujet « Spectrosocpy ».

À côté de chaque source dans la liste de références il y a un bouton « Ajouter à la bibliographie ». Cliquez sur ce bouton, et nous générerons automatiquement la référence bibliographique pour la source choisie selon votre style de citation préféré : APA, MLA, Harvard, Vancouver, Chicago, etc.

Vous pouvez aussi télécharger le texte intégral de la publication scolaire au format pdf et consulter son résumé en ligne lorsque ces informations sont inclues dans les métadonnées.

Articles de revues sur le sujet "Spectrosocpy"

1

White, K. M., et C. J. Eckhardt. « Mode anharmonicity in molecular crystals studied by piezomodulated Raman spectrosocpy ». Physical Review Letters 59, no 5 (3 août 1987) : 574–77. http://dx.doi.org/10.1103/physrevlett.59.574.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
2

de Bruin, W. C., C. W. J. Sorber, T. de Jong et J. B. T. van Dort. « Integrated image analysis and electron energy loss spectrosocpy in EM ». Ultramicroscopy 27, no 2 (mars 1989) : 199. http://dx.doi.org/10.1016/0304-3991(89)90100-9.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
3

Wang, Qiao Yun, Zhi Gang Li et Zhen He Ma. « Noninvasive Detection of Concealed Complex Mixed Solution Using Raman Spectroscopy ». Advanced Materials Research 926-930 (mai 2014) : 170–73. http://dx.doi.org/10.4028/www.scientific.net/amr.926-930.170.

Texte intégral
Résumé :
In this paper, we present a modification Raman spectroscopic method-Spatially Offset Raman Spectrosocpy (SORS) for the noninvasive detection for the complex mixed soultion through diffusely scattering and fluorescing bottles and other packaging (including transparent, colored, diffusely cattering palstic and glass beverage, medicine and cosmetic bottles). Compared with conbentional Raman spectroscopic method, SORS is able to effectively supress fluorescence and Raman contributions originating from the container. This inherent ability cans substantially enhance the sensitivity. The application is demonstrated on the noninvasive detedtion of complex mixed solution. The experiments were performed using a 1064nm laser with 500mW average power, and a circular array of collection fibers were surround with the exciting laser. The resluts show that the SORS technology was capable of identifying the presence of concealed complex mixed solution in both transparent and non-transparen samples in quality control and authentication of chemical products.
Styles APA, Harvard, Vancouver, ISO, etc.
4

Gorshunov, B., A. Volkov, I. Spektor, A. Prokhorov, A. Mukhin, M. Dressel, S. Uchida et A. Loidl. « Terahertz BWO-Spectrosopy ». International Journal of Infrared and Millimeter Waves 26, no 9 (8 août 2005) : 1217–40. http://dx.doi.org/10.1007/s10762-005-7600-y.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
5

Rubin, Robert H., Janet P. Simpson, Steven D. Lord, Sean W. J. Colgan, Edwin F. Erickson et Michael R. Haas. « Nebular properties from far-infrared spectrosopy ». Astrophysical Journal 420 (janvier 1994) : 772. http://dx.doi.org/10.1086/173601.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
6

Yan, Xiunan, Pan Li, Liangbao Yang et Jinhuai Liu. « Time-dependent SERS spectra monitoring the dynamic adsorption behavior of bipyridine isomerides combined with bianalyte method ». Analyst 141, no 17 (2016) : 5189–94. http://dx.doi.org/10.1039/c6an00771f.

Texte intégral
Résumé :
Based on the bianalyte method, time-dependent surface-enhanced Raman spectrosopy (SERS) spectra were applied to observe and study the competitive adsorption of bipyridine isomerides 2,2′-bpy and 4,4′-bpy.
Styles APA, Harvard, Vancouver, ISO, etc.
7

Minčeva-Šukarova, Biljana. « Meteorite Struga – overview of previous chemical and recent spectroscopic analyses ». Macedonian Journal of Chemistry and Chemical Engineering 28, no 1 (15 juin 2009) : 41. http://dx.doi.org/10.20450/mjcce.2009.220.

Texte intégral
Résumé :
Meteorite Struga fell more than 35 years ago near the town of Struga, Republic of Macedonia. Its fall was notified in the Bulletien of the Geological Institute in Skopje in 1973. Since that time, only one chemical analysis has been reported (in 1990) and most recently, preliminary spectrosocpic investigations (in 2006 and in 2008) have been performed. However, this meteorite has not yet been classified in the World’s Database of Meteorites. The aim of this paper is to collect and summarize all available data published until now on this meteorite and open the possibility to clasify it and list it in the World’s Database of Meteorites. In order to make the results more available, the details of the previous chemical and the recent spectrosocpic analyses on this meteorite are presented in this paper. Collected information from both analyses were used for the description of the characteristics of this meteorite. Previous chemical analysis and the recent spectrosocpic investigations are in good agreement and confirm the earlier classification of this meteorite as stony chondrite of H type.
Styles APA, Harvard, Vancouver, ISO, etc.
8

Warecka, Gerhard, Gerd Rumplmayr et Johannes A. Lercher. « Characterization of alkali exchanged ZSM5 by IR spectrosopy ». Mikrochimica Acta 95, no 1-6 (janvier 1988) : 101–4. http://dx.doi.org/10.1007/bf01349730.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
9

Voss, Jürgen, Gabriele Kupczik et Heidi Stahncke. « EPR Studies on Carboxylic Esters. Part 20. EPR Spectra and Spin Densities in Radical Anions of Isocoumarin, Benzocoumarin and their Sulfur Analogues ». Journal of Chemical Research 2009, no 5 (mai 2009) : 283–86. http://dx.doi.org/10.3184/030823409x449428.

Texte intégral
Résumé :
The radical anions of isocoumarin, benzocoumarin and the six corresponding sulfur analogues have been generated by internal electroreduction and studied by EPR spectrosopy. The spin density distributions have been evaluated from the proton hyperfine structure coupling constants and by MO calculations. They are discussed with respect to the spin density distributions in related radical anions.
Styles APA, Harvard, Vancouver, ISO, etc.
10

Chu, W., M. C. Kolios et G. J. Czarnota. « 75 Ultrasound imaging and spectrosocopy of cancer therapy effects ». Radiotherapy and Oncology 80 (septembre 2006) : S23. http://dx.doi.org/10.1016/s0167-8140(06)80816-9.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
Plus de sources

Thèses sur le sujet "Spectrosocpy"

1

Carneiro, Leandro de Bispo [UNESP]. « Detecção do peptídeo p17 (HIV) baseado em SERS (Surface-enhanced Raman Spectrosocpy) ». Universidade Estadual Paulista (UNESP), 2015. http://hdl.handle.net/11449/138424.

Texte intégral
Résumé :
Made available in DSpace on 2016-05-17T16:51:15Z (GMT). No. of bitstreams: 0 Previous issue date: 2015-07-29. Added 1 bitstream(s) on 2016-05-17T16:54:48Z : No. of bitstreams: 1 000863271.pdf: 3961818 bytes, checksum: ac858d20df08483eb5bdbe31474f4806 (MD5)
A espectroscopia de Raman intensificada por superfície (SERS, termo em inglês Surfaceenhanced Raman Spectroscopy) é uma técnica promissora que mostra a sensibilidade para a detecção da interação de biomoléculas que são importantes para detecção precoce de doenças. O vírus da imunodeficiência humana (HIV) têm sido um grande problema por várias décadas. Existem vários métodos de deteção baseados na interação específica de anticorpos, tais como, o ELISA e os testes rápidos (TR's). No entanto, novas estratégias têm sido desenvolvidas para rápido diagnóstico do vírus HIV, e uma prova de conceito de detecção do peptídeo p17-1 foi descrito neste trabalho. A proteina matriz p17 é uma essencial proteína no ciclo de replicação do vírus HIV. As fases iniciais da replicação do vírus envolve a pré integração do complexo do DNA no núcleo do p17 desempenhando um papel na ligação de RNA viral e transporte para a membrana. Neste trabalho foram descritos duas plataformas SERS para a detecção do vírus HIV baseado no peptide p17 -1 (sequência LSGGELDRWEKIRLPGG). O anticorpo foi imobilizado em um substrato de ouro usando duas diferentes camadas automontadas (SAM). A primeira SAM, os substratos de ouro foram imersos em uma solução aquosa de 11 mercaptoundecanóico (MUA). Na segunda SAM, os substratos foram imersos em uma mistura aquosa de politietileno glicol (SHPEG- COOH e SH-PEG-CH3). Aqui serão chamados de SAM-MUA e SAM-PEG, respectivamente. Ambas as SAM's foram imersas emu ma solução de anticorpo (anti-p17) e foram descritas como plataforma d captura MUA e PEG. Ambas plataformas foram funcionalizadas com o peptídeo p17-1. Sondas SERS foram preparadas com nanopartículas de ouro e revestidas com uma molécula Raman reporter (azul de Nilo A) e funcionalizadas com um anticorpo anti-p17. Estas estruturas (sonda SERS e plataformas de captura) formam um ensaio sanduíche...
Surface-enhanced Raman Scattering (SERS) technique offers great promises for simplified and sensitive detection of biomolecular interactions that are relevant for early disease diagnostics. Human immunodeficiency virus (HIV) has been a problem for decades. There are several methods of diagnostics based on antibodies specific reactions, such as enzyme-linked immunosorbent assays (ELISAs) and rapid test (RT). However, new strategies have been developed for rapid HIV diagnostics and, as a proof-of-concept, peptide p17-1 was considered here. The matrix protein p17 is a structural protein that is essential in the life cycle of the retrovirus The early stages of the virus replication involve the pre integration of the DNA complex into the nucleus P17 plays a role in RNA viral binding and transport to the membrane. Here were describe two new SERS platform for HIV detection based on peptide p17-1 (sequence LSGGELDRWEKIRLPGG). The antibody anti-p17 was immobilized in a planar gold surface using two differents self-assembled (SAM) techniques. First SAM, were obtained by immersion of the surface into ethanolic solution of 11-Mercaptoundecanoic acid (MUA). Second SAM were obtained by immersion in aqueous solution aquous mixtures of (SH-PEG-COOH/SH-PEG-CH3) and polyethylene glycol (PEG,). Here were describe the two platforms as SAM-MUA and SAMPEG, respectively. Both SAM's were immersed in a solution containing the anti-p17. Samples at this step were called capture platform-MUA and capture platform-PEG. Both capture platforms were funcionalizated with the peptide p17-1. SERS probes were prepared with gold nanoparticles coated with a Raman reporter molecule (Nile Blue A) and, functionalized with an anti-p17. These structures (SERS probe and capture platforms) allow for a sandwich assay, a strategy regularly used for high-sensitivity detection. The light blue color in the SERS mapping represents peptide strong...
Styles APA, Harvard, Vancouver, ISO, etc.
2

Öijerholm, Johan. « Ionic transport of α-alumina below 1000°C : an in-situ impedance spectrosocpy study ». Licentiate thesis, KTH, Materials Science and Engineering, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-338.

Texte intégral
Résumé :

Ionic conductivity of metal oxides is critical for the function of a broad range of different components, such as electrolytes in solid oxide fuel cells and alloys designed for high temperature applications. In both cases the ionic conductivity can be studied by in situ impedance spectroscopy, which is also able to reveal information on the dielectric properties of the metal oxides, and in some cases the influence of their microstructure. The focus of this thesis is on impedance spectroscopy measurements of α-alumina in the temperature range 400-1000 °C. This metal oxide has found extensive use as the protective scale on heat resistant alloys. Some unpublished work on oxygen ion conductivity of yttria-stabilized zirconia is also included.

The low electrical conductivity of α-alumina can be a source for errors and misinterpretations during impedance spectroscopy measurements. A major disturbance originates from leakage currents that appear in the experimental setup. These leakage currents are due to conduction through the gas phase around the sample, conduction on the sample surface, or poor insulation in the sample holder. It was shown that below 700 °C, conduction on the sample surface could severely distort the measurement. The magnitude of the distortions appeared to be sensitive to the type of electrodes used. The use of a so-called guard electrode was shown to effectively block the surface conduction in the measurements.

Conductivity of metal oxides is known to be dependent on their microstructure. Generally it is believed that ionic conductivity is favoured along grain boundaries and dislocations. The influence of microstructure on conductivity was studied for α-alumina in the temperature range 400-1000 °C. The conductivity of a series of highly pure and dense samples with narrow grain size distributions was measured by impedance spectroscopy. It appeared that the activation energy for conduction increased with decreasing grain size.

Results based purely on impendence spectroscopy have some inherently weaknesses. For instance no information on the nature of the charge carrier can be found. Therefore the charge transport in single crystalline α-alumina was simulated by the molecular dynamics method. The results from the simulation were then compared to results from impedance measurements on single crystalline α-alumina. From the simulation it turned out that diffusion of aluminium ions had lower activation energy than diffusion of oxygen. The activation energy of oxygen was close to the measured activation energy, and the mobility of oxygen was higher than for aluminium. Therefore the dominating charge carrier was suggested to be oxygen ions.

Styles APA, Harvard, Vancouver, ISO, etc.
3

Gravestijn, Bob. « Importance of radial profiles in spectroscopic diagnostics applied to the EXTRAP-T2R reversed-field pinch ». Doctoral thesis, KTH, Physics, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3656.

Texte intégral
Résumé :

The determination of the plasma confinement propertiesdemand data as the electron temperature, the ionic and electrondensity profiles and the radiative emissivity profiles. Thefocus of this thesis is the importance of radial profiles inspectroscopic diagnostics applied to the EXTRAP-T2Rreversed-field pinch.

EXTRAP-T2R is a resistive shell reversed-field pinch with amagnetic field shell penetration time much longer than therelaxation cycle time scale. Significant improvements inconfinement properties derived by quantitative plasmaspectroscopy in the vacuum ultraviolet are observed compared tothe previous device EXTRAP-T2. The low level of magneticturbulence and the good magnetic surfaces in the edge regionexplain this observed improvement. A current profile controlexperiment reduces the stochastic transport, which is connectedto the dynamo, and improves the confinement in EXTRAP-T2R evenmore.

A comparison of the electron temperature estimated by usinga ratio of line intensities from the same ionization stage ofoxygen and the Thomson scattering system shows that thedifference is explained by the different spatial dependence ofthe excited state populations and the corresponding emissivityof these spectral lines. A collisional radiative model givesestimates for radial profiles of impurities which are notmeasured in EXTRAP-T2R. The estimated profiles can in turn beused to determine the radial profile of the effective ioncharge, the emissivity and finally the radiative power. Asinput, the model uses radial profiles.

Neutral hydrogen is predominantly present in the boundaryregion of the plasma. Spectroscopic investigations in this areashow very asymmetric spectral lines of hydrogen due to themovement of atoms. The velocity of the hydrogen atoms dependson the type of plasma-wall interaction and their measurementhelps to identify the different interaction processes. Theexistence of hydrogen molecules in the edge complicates theinterpretation of the line shapes and on the determination ofthe particle confinement time.

Keywords:Reversed-field pinch, EXTRAP-T2R, quantitativeplasma spectroscopy, VUV spectroscopy, line-integrated electrontemperature, oxygen, profiles, confinement properties, powerbalance, hydrogen, particle confinement time.

Styles APA, Harvard, Vancouver, ISO, etc.
4

Filho, Pedro Bertemes. « Tissue characterisation using an impedance spectrosopy probe ». Thesis, University of Sheffield, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.251204.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
5

Dong, Sunny Ronald. « The investigation of indium halides and graphite intercalation compounds using time-differential perturbed angular correlation gamma-ray spectrosocopy ». Thesis, University of British Columbia, 1988. http://hdl.handle.net/2429/28375.

Texte intégral
Résumé :
This thesis discusses in general terms the theory and application of time-differential perturbed angular correlation gamma-ray spectroscopy (TDPAC) to the study of solid state physics. The technique yields valuable information on the electric field gradients experienced by radionuclides which have been substituted for nonradioactive isotopes or inserted as impurities into various inorganic compounds. The indium halides are examined in a series of experiments. The first applications of this technique to the study of graphite intercalation compounds are discussed.
Science, Faculty of
Physics and Astronomy, Department of
Graduate
Styles APA, Harvard, Vancouver, ISO, etc.
6

Arenas, Daniel J. « Devices and materials for THz spectrosopy [sic] GHz CMOS circuits, periodic hole-arrays and high-frequency dielectric materials / ». [Gainesville, Fla.] : University of Florida, 2009. http://purl.fcla.edu/fcla/etd/UFE0024735.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
7

Nicoli, François. « Etude du liquide cephalorachidien par spectrosocpie de resonance magnetique du proton : problemes methodologiques et applications cliniques ». Aix-Marseille 2, 1990. http://www.theses.fr/1990AIX20208.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
8

Tiret, Brice. « Développements méthodologiques en RMN des noyaux X pour l’étude in vivo du métabolisme cérébral pendant la neurodégénérescence ». Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLS221.

Texte intégral
Résumé :
Le but de ce travail de thèse a été de développer à MIRC en une capacité à observer deux aspects clefs du métabolisme cérébral chez le rongeur par spectroscopie RMN des noyaux X : le métabolisme mitochondrial du glucose à partir de l’observation du 13C et la synthèse d’ATP par observation du 31P. Ces développements s’inscrivent à la fois dans une recherche fondamentale pour améliorer notre compréhension du signal RMN et raffiner son analyse ainsi que du métabolisme cérébral chez les sujets sains. Ils s’inscrivent aussi dans une recherche translationnelle avec la possibilité d’évaluer certains aspects du métabolisme comme potentiels biomarqueurs de maladies neurodégénératives. Ces travaux ont pu être réalisés à très haut champ (11.7T) permettant d’obtenir un meilleur rapport signal à bruit. Dans un premier temps, nous présenterons le développement d’une séquence de transfert de saturation pour la mesure des flux de synthèse d’adénosine triphosphate (ATP) et de phosphocréatine (PCr). Cette séquence a été optimisée pour sélectionner avec un module de localisation ISIS le signal émis par le cerveau uniquement. Avec l’augmentation de la résolution spectrale à haut champ, cette séquence a pu être utilisée pour caractériser le phosphate inorganique extracellulaire, et prévenir un biais de quantification possible à plus bas champ. De plus, elle a permis l’observation de l’adaptation du métabolisme cérébral chez les rats transgéniques BACHD, modèles de la maladie de Huntington. Ces rats présentent une augmentation d’environ 10% de la concentration de PCr permettant de pallier à leur plus faible taux de synthèse d’ATP qui lui est diminué de moitié. Dans un second temps, la mise en place d’un pipeline automatisé d’analyse des données a permis d’explorer le modèle métabolique bicompartimental de la consommation de glucose observée en spectroscopie 13C, qui prend en compte le cycle de Krebs dans les neurones et les astrocytes. Deux corrections majeures ont été apportées au modèle traditionnel permettant d’expliquer les dynamiques à moyen et long termes. La première est la mise en évidence d’un pool de glutamate vésiculaire agissant comme tampon temporel au marquage du glutamate, la seconde est la présence d’une dilution 6 fois plus importante de pyruvate vers les astrocytes que vers les neurones. Ces résultats viennent renforcer les hypothèses entourant le couplage métabolique entre ces deux types cellulaires. Ces hypothèses ont pu être testées après l’optimisation d’une séquence d’acquisition du signal RMN des noyaux 13C par transfert de polarisation (DEPT), testée in vivo dans le cerveau du rat sain. Finalement, l’utilisation combinée de la spectroscopie 31P et 13C a été appliquée chez le rat sous intoxication chronique au 3-NP, une toxine inhibant le cycle de Krebs et utilisée comme modèle de la maladie de Huntington
The aim of this thesis was to develop at MIRCen new capabilities to observe two key aspects of energy metabolism in rodent brains using X nuclei NMR spectroscopy: glucose consumption with 13C spectroscopy and adenosine triphosphate (ATP) synthesis with 31P measurements. These developments will be used to both expand general understanding of brain metabolism in healthy subjects but also provide technical tools to search for biomarkers in translational projects of drug development applied to neurodegenerative diseases. This work was done at very high field (11.7T) where signal to noise could be maximized. In the first part, we present the optimization of saturation transfer sequence to measure ATP synthesis rate as well as phosphocreatine (PCr) synthesis rate. With ISIS module, the signal was localized to a voxel containing only the brain, eliminating outside source of signal. With the higher spectral resolution offered by high fields, a second, extracellular pool of Pi was characterized which could prevent possible biases in flux quantification of ATP synthesis. This sequence was also applied to measure metabolic adaptation of BACHD rat models (models of Huntington’s disease, HD) where it was found that the 10% increase in PCr concentration could palliate the ATP synthase activity that is halved in this model. In the second part, we present how deeper analysis of 13C data using automatic differential equation writing script was used to better understand the bicompartmental model of glucose degradation to glutamate and glutamine, which accounts for TCA cycle in neurons and astrocytes. Two major corrections were made to the traditional model, to fit mid- and long-term unexplained dynamics. Looking at glutamate and glutamine isotopomer labeling dynamics, the necessity of adding a vesicular glutamate temporal buffer was made evident. The distinction between astrocytic and neuronal pyruvate dilution also showed that astrocytes use up to 6 times more pyruvate than neurons showing intricate metabolic coupling between the two cell types. These results have then been tested in vivo after optimization of the ISIS-DEPT sequence to observe 13C labeling in the rat brain. Finally, experiments combining 31P and 13C spectroscopy were performed on rats chronically intoxicated with 3-NP, a toxin inhibiting TCA cycle which is used as a model of HD
Styles APA, Harvard, Vancouver, ISO, etc.
9

Travaillé, Grégoire. « Spectroscopie LIBS sans calibration : évaluation critique et application à l’analyse de sols pollués ». Thesis, Bordeaux 1, 2010. http://www.theses.fr/2010BOR14143/document.

Texte intégral
Résumé :
Aujourd’hui encore, malgré l’utilisation de techniques spectrochimiques de référence, l’aspect quantitatif de la spectroscopie sur plasma induit par laser (LIBS) reste largement en friche du fait d’effets de matrice incapacitants. La LIBS sans étalonnage (CF-LIBS) est une des façons considérées par la communauté scientifique afin de relever ce défi. Malgré ses postulats d’idéalité du plasma (ETL, homogénéité et stationnarité du plasma), à l’heure actuelle peu d’études extensives ont été développées afin de réaliser une évaluation critique de la méthode. A l’aide d’outils théoriques (modèle collisionnel-radiatif développé pour l’Aluminium, Argon et Cadmium) et expérimentaux (expérience de Diffusion Thomson) tirant leur origine de la physique des plasmas, ainsi que de cas pratiques d’analyses, nous tenterons d’établir le cahier des charges le plus favorable à l’analyse quantitative par CF-LIBS. L’application de cette méthode à l’analyse d’échantillons complexes (minéraux et sols pollués) sera discutée à l’aune de nos résultats et des connaissances actuellement disponibles en la matière
Despite the existence of many benchmarked spectrochemical analysis techniques in the field of Laser-Induced Breakdown Spectroscopy (LIBS), the quantitative analysis holds of the laser induced plasma still holds a huge number of analytical drawbacks, the occurrence of matrix effects not being the slightest among those ones.Calibration-Free LIBS was historically developped to address specifically those aspects, and has already reached a high level of maturation for the analysis of simple metallic or soil samples. Unfortynately, in spite of the strong assumptions that need to be necesserily considered in the CF-LIBS algorithm (such as Local Thermodynamic Equilibrium, and the homogeneity and stationnarity of the plasma), only a few number of contributions have been devoted to the critical assessment of the latter postulates to date. Thanks to the help of several case tests and theoretical (collisionnal-radiative model depicting aluminum, argon and cadmium plasmas) and experimental concepts originating from the field of plasma physics (Thomson-Scattering experiments intended to validate our results), we will focus our study on the research and development of novel experimental criteria that would allow an experimentalist to set up and analyze a CF-LIBS experiment in the least unfavourable theoretical and experimental conditions.We will eventually apply our new considerations on the prediction of the CF-LIBS analysis efficiency, coming to the specific field of interest of analysis of geophysical samples (such as soils polluted by heavy metals). A special interest will be paid on the latest developments appearing nowadays in the field of LIBS, and devote a part of our debate on the expectancies that will have to be fulfilled in order to highen the analysis potential of LIBS
Styles APA, Harvard, Vancouver, ISO, etc.
10

Ditto, Jeffrey. « Characterization of the Local Structure and Composition of Low Dimensional Heterostructures and Thin Films ». Thesis, University of Oregon, 2016. http://hdl.handle.net/1794/20434.

Texte intégral
Résumé :
The observation of graphene’s extraordinary electrical properties has stirred great interest in two dimensional (2D) materials. The rapid pace of discovery for low dimensional materials with exciting properties continue with graphene allotropes, multiple polymorphs of borophene, germanene, and many others. The future of 2D materials goes beyond synthesis and characterization of free standing materials and on to the construction of heterostructures or sophisticated multilayer devices. Knowledge about the resulting local structure and composition of such systems will be key to understanding and optimizing their performance characteristics. 2D materials do not have a repeating crystal structure which can be easily characterized using bulk methods and therefore a localized high resolution method is needed. Electron microscopy is well suited for characterizing 2D materials as a repeating coherent structure is not necessary to produce a measureable signal as may be the case for diffraction methods. A unique opportunity for fine local scale measurements in low dimensional systems exists with a specific class of materials known as ferecrystals, the rotationally disordered relative of misfit layer compounds. Ferecrystals provide an excellent test system to observe effects at heterostructure interfaces as the whole film is composed of interdigitated two dimensional layers. Therefore bulk methods can be used to corroborate local scale measurements. From the qualitative interpretation of high resolution scanning transmission electron microscope (STEM) images to the quantitative application of STEM energy dispersive X-ray spectroscopy (EDX), this thesis uses numerous methods electron microscopy. The culmination of this work is seen at the end of the thesis where atomically resolved STEM-EDX hyperspectral maps could be used to measure element specific atomic distances and the atomically resolved fractional occupancies of a low dimensional alloy. These local scale measurements are corroborated by additional experimental data. The input of multiple techniques leads to improved certainty in local scale measurements and the applicability of these methods to non-ferecrystal low dimensional systems.
Styles APA, Harvard, Vancouver, ISO, etc.
Plus de sources

Livres sur le sujet "Spectrosocpy"

1

Beutler, Rolf. Inherent hydrogen and trapping of sub-eV deuterium in pyrolytic graphite and TiC. [Downsview, Ont.] : Dept. of Aerospace Science and Engineering, 1986.

Trouver le texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
2

Dutta, Mala. Nuclear Magnetic Resonance Spectrosocopy. Sarup & Sons, 2004.

Trouver le texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.

Chapitres de livres sur le sujet "Spectrosocpy"

1

Ferrari, Marco, David A. Wilson, Daniel F. Hanley, Jean F. Hartmann et Richard J. Traystman. « Determination of Cerebral Venous Hemoglobin Saturation by Derivative Near Infrared Spectrosocpy ». Dans Oxygen Transport to Tissue XI, 47–53. Boston, MA : Springer US, 1989. http://dx.doi.org/10.1007/978-1-4684-5643-1_6.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
2

Sieckmann, I., C. Bock, K. Brettel, A. van der Est, P. Sétif et D. Stehlik. « Fast Electron Transfer Kinetics in Photosystem I from Transient EPR-Spectrosoopy at Room Temperature ». Dans 25th Congress Ampere on Magnetic Resonance and Related Phenomena, 220–21. Berlin, Heidelberg : Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-76072-3_115.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
3

Valero, Carlos, et Anna Igual. « Electrochemical Aspects in Biomedical Alloy Characterization : Electrochemical Impedance Spectrosopy ». Dans Biomedical Engineering, Trends in Materials Science. InTech, 2011. http://dx.doi.org/10.5772/13039.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
4

Dritsa, V., D. Sgouros, K. Pissaridi, P. Bochlogyros, M. Kyriakidou et V. Mamareli. « Enamel Structure on Children with Down Syndrome — An FT-IR Spectrosocpic Study ». Dans Infrared Spectroscopy - Anharmonicity of Biomolecules, Crosslinking of Biopolymers, Food Quality and Medical Applications. InTech, 2015. http://dx.doi.org/10.5772/58909.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.

Actes de conférences sur le sujet "Spectrosocpy"

1

Hermanns, Marius, Stephan Schlemmer, Christian Endres, Frank Lewen et Nadine Wehres. « HETERODYNE RECEIVER FOR LABORATORY SPECTROSOCPY OF MOLECULES OF ASTROPHYSICAL IMPORTANCE ». Dans 71st International Symposium on Molecular Spectroscopy. Urbana, Illinois : University of Illinois at Urbana-Champaign, 2016. http://dx.doi.org/10.15278/isms.2016.fb04.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
2

Mesko, AJ, Susanna Widicus Weaver, Stefanie Milam et Ian Wagner. « PROBING GAS PHASE CHEMISTRY ABOVE ICE SURFACES WITH MILLIMETER/SUBMILLIMETER SPECTROSOCPY ». Dans 69th International Symposium on Molecular Spectroscopy. Urbana, Illinois : University of Illinois at Urbana-Champaign, 2014. http://dx.doi.org/10.15278/isms.2014.ta04.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
3

Mourant, Judith R., Jorge Dominguez, Susan Carpenter, Tamara M. Powers, Anabel Guerra, Kurt W. Short, Nagapratima Kunapareddy et James P. Freyer. « Determining the gross biochemical composition of cells and tissue with Raman spectrosocpy ». Dans Biomedical Optics 2006, sous la direction de Anita Mahadevan-Jansen et Wolfgang H. Petrich. SPIE, 2006. http://dx.doi.org/10.1117/12.646809.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
4

Hassan, Jamal, Aris Chatzichristos, Lydia Gkoura et George Papavassilliou. « On The Water Dynamics Inside Carbon Nanotubes : NMR Spectrosocpy And MD Simulation Techiquess ». Dans 6th International Conference on Theoretical and Applied Nanoscience and Nanotechnology (TANN'22). Avestia Publishing, 2022. http://dx.doi.org/10.11159/tann22.135.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
5

Wallick, Rachel, Renske van der Veen et Josh Vura-Weis. « PHOTOPHYSICS OF Ni PYRIDINOPHANE PHOTOCATALYSTS USED FOR C-O CROSS-COUPLING REACTIONS PROBED VIA FEMTOSECOND OPTICAL ABSORPTION SPECTROSOCPY ». Dans 2022 International Symposium on Molecular Spectroscopy. Urbana, Illinois : University of Illinois at Urbana-Champaign, 2022. http://dx.doi.org/10.15278/isms.2022.th03.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
6

Bortz, M. L., T. Day, M. M. Fejer et W. Wang. « Frequency Doubled External Cavity Diode Lasers for Spectroscopy Applications ». Dans Nonlinear Optics : Materials, Fundamentals and Applications. Washington, D.C. : Optica Publishing Group, 1996. http://dx.doi.org/10.1364/nlo.1996.nthe.25a.

Texte intégral
Résumé :
Laser spectroscopy, long the domain of the dye laser, is experiencing a renaissance due to the development of tunable, higly coherent, external cavity diode lasers (ECDL’s). Such lasers have been used extensively as sources for precision spectroscopy experiments. Recently, ECDL’s have become commercially available, sparking interest in the development of diode laser based sensors for many industrial and process control applications. One particular class of applications involves the sensing of atoms during the growth of thin films. Many atoms have strong ground state absorption lines between 380-420 nm, a wavelength range that is fortuitously at 1/2 the output wavelength of mature GaAs based diode laser technology and accessible with either LiNbO3, LiTaO3, and KTP QPM-SHG waveguides. The marriage of ECDL’s and nonlinear quasi-phasematched second harmonic generation waveguide allows the generation of tunable, highly coherent radiation in the blue-UV spectral range required for atomic absorption spectoscopy. Furthermore, the low power levels and ~ 10 GHz tuning ranges required for atomic absorption spectroscopy are readily achievable with ECDL’s and QPM-SHG waveguides. Atomic absorption spectrosocpy can yield information about the deposition process and can be used to monitor and control the film growth rate. In this presentation we review the development of frequency doubled ECDL’s and applications to the material synthesis of aluminum and titanium films.
Styles APA, Harvard, Vancouver, ISO, etc.
7

Bortz, M. L., T. Day, M. M. Fejer et W. Wang. « Frequency Doubled External Cavity Diode Lasers for Spectroscopy Applications ». Dans Nonlinear Optics : Materials, Fundamentals and Applications. Washington, D.C. : Optica Publishing Group, 1996. http://dx.doi.org/10.1364/nlo.1996.nthe.25.

Texte intégral
Résumé :
Laser spectroscopy, long the domain of the dye laser, is experiencing a renaissance due to the development of tunable, higly coherent, external cavity diode lasers (ECDL’s). Such lasers have been used extensively as sources for precision spectroscopy experiments. Recently, ECDL’s have become commercially available, sparking interest in the development of diode laser based sensors for many industrial and process control applications. One particular class of applications involves the sensing of atoms during the growth of thin films. Many atoms have strong ground state absorption lines between 380-420 nm, a wavelength range that is fortuitously at 1/2 the output wavelength of mature GaAs based diode laser technology and accessible with either LiNbO3, LiTaO3, and KTP QPM-SHG waveguides. The marriage of ECDL’s and nonlinear quasi-phasematched second harmonic generation waveguide allows the generation of tunable, highly coherent radiation in the blue-UV spectral range required for atomic absorption spectoscopy. Furthermore, the low power levels and ~ 10 GHz tuning ranges required for atomic absorption spectroscopy are readily achievable with ECDL’s and QPM-SHG waveguides. Atomic absorption spectrosocpy can yield information about the deposition process and can be used to monitor and control the film growth rate. In this presentation we review the development of frequency doubled ECDL’s and applications to the material synthesis of aluminum and titanium films.
Styles APA, Harvard, Vancouver, ISO, etc.
8

Boyson, Toby K., et Charles C. Harb. « Advanced Wideband Cavity Enhanced Spectrosopy ». Dans CLEO : Applications and Technology. Washington, D.C. : OSA, 2015. http://dx.doi.org/10.1364/cleo_at.2015.ath1k.3.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
9

Sildos, Ilmo, V. Kiisk, S. Lange et J. Aarik. « Time-resolved exciton-emission spectrosopy of anatase ». Dans SPIE Proceedings, sous la direction de Andris Krumins, Donats Millers, Inta Muzikante, Andris Sternbergs et Vismants Zauls. SPIE, 2003. http://dx.doi.org/10.1117/12.515702.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
10

Mehrotra, Dev R., Juncheng Zhang, Tianbai Wang, Diya Desai, Mark W. Grinstaff, Brian D. Snyder, Mads S. Bergholt et Michael B. Albro. « Raman spectrosopy for monitoring of engineered cartilage growth (Conference Presentation) ». Dans Advanced Biomedical and Clinical Diagnostic and Surgical Guidance Systems XXI, sous la direction de Caroline Boudoux et James W. Tunnell. SPIE, 2023. http://dx.doi.org/10.1117/12.2650163.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
Vous pouvez également être intéressé par les bibliographies sur le sujet « Spectrosocpy » pour d’autres types de sources :
Articles de revues Thèses
Nous offrons des réductions sur tous les plans premium pour les auteurs dont les œuvres sont incluses dans des sélections littéraires thématiques. Contactez-nous pour obtenir un code promo unique!

Vers la bibliographie