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Статті в журналах з теми "Spectro-Microscopy":
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Miyoshi, N., T. Yamada, T. Ogawa, and H. Kinoshita. "Bioogical Meaning for Bioimaging by FT-IR spectro-microscopy and Raman spectro-microscopy." Seibutsu Butsuri 43, supplement (2003): S118. http://dx.doi.org/10.2142/biophys.43.s118_1.
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Harter, Klaus, Alfred J. Meixner, and Frank Schleifenbaum. "Spectro-Microscopy of Living Plant Cells." Molecular Plant 5, no. 1 (January 2012): 14–26. http://dx.doi.org/10.1093/mp/ssr075.
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Makita, Seiji, Hiroyuki Matsuda, Yasuaki Okano, Takayuki Yano, Eiken Nakamura, Yuri Hasegawa, Satoshi Kera, Shigemasa Suga, and Fumihiko Matsui. "Contrast Inversion of Photoelectron Spectro-microscopy Image." e-Journal of Surface Science and Nanotechnology 19 (May 13, 2021): 42–47. http://dx.doi.org/10.1380/ejssnt.2021.42.
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Schmidt, Th, M. Siebert, A. Pretorius, S. Gangopadhyay, S. Figge, J. I. Flege, L. Gregoratti, A. Barinov, D. Hommel, and J. Falta. "Spectro-microscopy of Si doped GaN films." Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 246, no. 1 (May 2006): 79–84. http://dx.doi.org/10.1016/j.nimb.2005.12.018.
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Lepert, Guillaume, Ricardo M. Gouveia, Che J. Connon, and Carl Paterson. "Assessing corneal biomechanics with Brillouin spectro-microscopy." Faraday Discussions 187 (2016): 415–28. http://dx.doi.org/10.1039/c5fd00152h.
Анотація:
A new Brillouin spectro-microscope was designed and built to investigate the mechanical properties of bovine and human corneas. This instrument integrates a single-stage virtually imaged phased array spectrometer with a novel adaptive-optics interferometric filter to achieve unprecedented rejection of the elastic background signal. As a result, highly-resolved, reproducible data from both thin and thick collagen-based materials were obtained. In particular, this technique is capable of rigorously measuring the relative stiffness of different areas of human corneas, thus providing a true non-contact method to characterise the fundamental mechanical features of both live and fixed biological tissue samples.
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KURATA, Hiroki, Seiji ISODA, and Takashi KOBAYASHI. "Study of Organic Crystals by Electron Spectro-Microscopy." Nihon Kessho Gakkaishi 36, no. 3 (1994): 199–203. http://dx.doi.org/10.5940/jcrsj.36.199.
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Rehman, R. A., H. J. Zhang, A. Razaq, S. M. Ramay, M. Hasan, M. A. Javed, and S. Atiq. "Spectro-microscopy characterization of CoPc-Au(111) interface." Physica E: Low-dimensional Systems and Nanostructures 125 (January 2021): 114357. http://dx.doi.org/10.1016/j.physe.2020.114357.
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Bode, M., A. Kubetzka, O. Pietzsch, and R. Wiesendanger. "Spin-resolved spectro-microscopy of magnetic nanowire arrays." Surface Science 514, no. 1-3 (August 2002): 135–44. http://dx.doi.org/10.1016/s0039-6028(02)01619-9.
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Bohic, S., R. Tucoulou, G. Martinez-Criado, S. Labouré, M. Salomé, and P. Cloetens. "C-10 Synchrotron Based Spectro-Microscopy for Cell Biology." Powder Diffraction 24, no. 2 (June 2009): 166. http://dx.doi.org/10.1154/1.3175930.
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Stohr, J., and S. Anders. "X-ray spectro-microscopy of complex materials and surfaces." IBM Journal of Research and Development 44, no. 4 (July 2000): 535–51. http://dx.doi.org/10.1147/rd.444.0535.
Дисертації з теми "Spectro-Microscopy":
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Vanacore, Giovanni Maria. "INVESTIGATION OF Ge SURFACE DIFFUSION AND SiGe NANOSTRUCTURES BY SPECTRO-MICROSCOPY TECHNIQUES." Phd thesis, Ecole Polytechnique X, 2011. http://tel.archives-ouvertes.fr/tel-00725427.
Анотація:
SiGe nanostructures on crystalline Si substrates with (001) orientation are among the most studied system in condensed matter physics and nanoscience. This interest has been mainly driven by the important potential applications in opto and nano-electronic devices thanks to the improvement of the optical and electronic properties compared to bulk systems. These features come essentially from the possibility of engineering the strain field within the nanostructures using the lattice mismatch of ~ 4 % between Ge and Si and from the spatial confinement, capable of modifying the electronic band structure leading to an increase of the charge carrier mobility. It is obvious that these applications largely depend on the control of surface processes during the growth of the nanostructures, and their performance are strongly dependent on strain relaxation and dislocation injection. Besides the technological interest, the SiGe/Si(001) system has received much attention since it is also a model for understanding the fundamental processes occurring during 3D island formation and self-organization phenomena. In fact, the lattice mismatch between Ge and Si introduces a stress field which has dramatic effects on the growth process and is responsible for a number of structural and electronic phenomena. In particular, the stored elastic energy can be partially relieved by spontaneous formation of 3D objects of nanometric size on top of a pseudomorphic SiGe wetting layer. This growth mode, called Stranski-Krastanov (SK), is a way of easily forming self-assembled nanostructures, which can be used to obtain quantum confinement of charge carriers in nanoelectronics device applications. In recent years, considerable efforts have been devoted to the growth of hetero-epitaxial SiGe nanostructures with well controlled size, shape and positioning, and with defined stoichiometry and strain state. However, some aspects still need to be addressed for a complete understanding of this system, including: (i) the competition between kinetic and thermodynamic factors for island formation, (ii) the mechanisms governing the relative growth of individual nanostructures, (iii) the interplay between SiGe intermixing and strain relaxation mechanisms. In the present work, we carry out an experimental investigation of the relationship between morphology, elemental composition, strain state and electronic structure of self-assembled and lithographically defined SiGe nanostructures by means of several spectro-microscopy techniques. The Si and Ge diffusion dynamics and the self-organization phenomena during the growth of SiGe islands have been studied by Scanning Auger Microscopy (SAM) and Atomic Force Microscopy (AFM). Micro-Raman, SAM and Scanning Transmission Electron Microscopy coupled with Electron Energy Loss Spectroscopy (STEM-EELS) techniques have been used for the investigation of the interplay between strain relaxation mechanisms and SiGe intermixing in self-assembled islands. The effects of strain and composition on the electronic band structure in lithographically defined SiGe nanostructures, in layout very close to those used in prototype devices, have been characterized with nanoscale spatial resolution joining information from Tip Enhanced Raman Spectroscopy (TERS), nanofocused X-Ray Diffraction (XRD) and Energy-Filtered PhotoElectron Emission Microscopy (PEEM). The thesis is conceptually divided in two main parts: the first, to which belong Chapters 1, 2 and 3, deals with the experimental investigation of the Ge surface diffusion and of the self-organization phenomena of SiGe islands grown in a bottom-up approach; the second, including Chapters 4 and 5, is based on the experimental characterization of the strain state and of the strain-induced effects on the electronic band structure of lithographically defined SiGe nanostructures obtained in a top-down approach Chapter 1 presents an overview on the basic processes occurring during hetero-epitaxial growth of thin solid films. In the Chapter 2 the surface diffusion of Ge on a clean and C covered Si(001) surface promoted by annealing at high temperatures in UHV of pure Ge stripes is experimentally investigated by means of in-situ Scanning Auger Microscopy. The influence of a controlled carbon coverage on the Ge surface diffusion is quantitatively studied, showing that the diffusion coefficient presents a strong dependence on carbon coverage (see Fig. 1(a)). Chapter 3 deals with the experimental investigation of the growth process of self-assembled SiGe islands on Si(001) (see Fig. 1(b)). From the size and density evolution exhibited by the nucleated islands, we propose a scenario where the island growth is essentially driven by kinetic factors within a diffusion limited regime. Finally, we investigated the interplay among SiGe intermixing and plastic relaxation, showing that the surface thermal diffusion growth method leads to the formation of coherent islands (dislocation-free), as shown in Fig. 1(c), larger than those attainable by MBE and CVD. Chapter 4 presents the mapping with nanoscale resolution of strain, composition, local work function and valence band structure of lithographically defined SiGe embedded nano-stripes using TERS and Energy-Filtered PEEM (see Fig. 1(d) showing the Ge concentration mapping of the nano-stripes as obtained by PEEM analysis). In Chapter 5 are presented the first results of a direct characterization of the strain state of lithographically defined SiGe nano-ridges using the recently developed nanofocused XRD technique. The work presented in this thesis is the outcome of an experimental PhD research project developed at the Politecnico di Milano (Milano, Italy) in co-tutorship with the École Polytechnique (Paris, France) and the French Atomic Energy Commission (CEA-Saclay, France). SAM and AFM have been performed at Department of Physics of the Politecnico di Milano. Micro-Raman Spectroscopy has been carried out at the Materials Science Department of the Università Milano-Bicocca. PEEM measurements have been realized at CEA and during two standard experimental runs at the TEMPO beamline of SOLEIL Synchrotron (France). TERS and preliminary TEM analysis have been performed at the École Polytechnique, while more extensive TEM and STEM-EELS measurements have been developed at IMM-CNR in Catania. The nano-XRD experiment has been carried out during a standard experimental run at ID13 beamline of the European Synchrotron Radiation Facility (ESRF). The close collaboration with the laboratory L-NESS in Como made available the set of the lithographically-defined investigated samples. The experimental results have been exploited in close collaboration with a theory group at the Materials Science Department of the Università Milano-Bicocca for a deeper insight into the atomic level mechanisms during island growth process.
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Darwish, Hamida M. B. "Characterization of different types of synthetic diamonds by luminescence and spectro-microscopy." Thesis, University of Bristol, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.435422.
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Cassese, Damiano. "Design and realization of nanoelectromechanical and plasmonic devices for raman spectro-microscopy." Doctoral thesis, Università degli studi di Trieste, 2015. http://hdl.handle.net/10077/11135.
Анотація:
2012/2013Lo sviluppo di nano-dispositivi per la misura di molecule biologiche e non biologiche è uno dei campi più importanti e in via di sviluppo della nanotecnologia. La possibilità di studiare cellule in vivo e di capirne le caratteristiche a livello molevolare ha contribuito enormemente all'avanzamento degli studi biologici negli ultimi decenni. Fra le tecniche più utilizzate, le Scanning Probe Microscopies (SPM) hanno una speciale rilevanza: sono non distruttive, con una bassa perturbazione dei sistemi studiati e permettono misure in aria e in liquido. Tali tecniche tuttavia non permettono il riconoscimento chimico, aspetto importante nello spiegare molti meccanismi cellulari. Una delle spettroscopie più utilizzate a tale scopo è il Raman, che permette il riconoscimento delle specie chimiche senza danneggiare i campioni ed è stato ampiamente utilizzato in molti studi biologici. Una combinazione di una tecnica SPM e della spettroscopia Raman è il Tip Enhanced Raman Spectroscopy (TERS): la stessa punta è usata per ricostruire le proprietà meccaniche e per illuminare localmente il campione per estrarne informazioni chimiche. Tale combinazione rende il TERS uno strumento molto potente per lo studio di strutture nanometriche. In questo lavoro di tesi abbiamo esplorato la possibilità di realizzare una punta TERS basata su un nanofilo in materiale semiconduttore cresciuto epitassialmente sulla punta di un cantilever per AFM. Il dispositivo, compatibile con le strumentazioni AFM disponibili sul mercato, ha come scopo lo sfruttamento della risonanza plasmonica creata nella particella metallica presente sulla cima del nanofilo: il segnale Raman può essere potenziato sfruttando il campo elettrico molto intenso creato in questo modo. | 910 | Abstract Nel primo capitolo si introduce le basi della tecnica AFM e vengono presentati due studi compiuti su cellule mesoteliali tramite questa microscopia. Nel secondo capitolo vengono presentati i nanofili in silicio: sono riportati i risultati ottenuti nella crescita di tali strutture, quindi vengono analizzate la citotossicità e la proliferazione di cellule su substrati di nanofili di silicio. Misure di microscpettroscopia Raman su nanofili di GaAs sono riportate nel capitolo 3: è stato studiato il cambiamento di struttura cristallina di tali nanofili dovuta a procedimenti di riscaldamenti controllati. Il capitolo 4 affronta lo studio delle proprietà SERS di nanofili di materiali e strutture diverse; sono presentati risultati sperimentali e calcoli ottenuti tramite simulazioni ad elementi finiti (FEA). Infine nel capitolo 5 presentiamo un innovativo procedimento per la fabbricazione di punte TERS a singolo nanofilo. In Appendice sono presentate brevemente le tecniche fabbricative usate durante il lavoro di tesi.
The development of nano-devices for sensing molecules, both biological and non-biological is one of the most important and thriving fields of nanotechnology. The possibility to investigate living cells and their characteristics at a molecular level contributed to the great advance of biological studies in the last decades. Among the most investigated techniques, Scanning Probe Microscopies (SPM) have a prominent position: non-destructiveness, low perturbation of the sample, possibility of measurements in air and in liquid make them perfectly suited to biological studies. These techniques however lack chemical recognition of the analysed surfaces. Many cell mechanisms can be explained only understanding the chemistry involved: the integration of a spectroscopic technique is therefore essential to have insights on the phenomena under study. One of the most investigated spectroscopy for such an integration is Raman: its interaction with molecular and crystal structures allows for chemical recognition. It has been widely used in studies of organic samples an biosensing and it provides non-destructive measurements. A smart combination of a SPM technique and Raman Spectroscopy is the so-called Tip Enhanced Raman Spectroscopy (TERS) where the same probe that is used to reconstruct the sample mechanical properties with nm resolution is also used to illuminate locally the sample to extract chemical information. The high resolution spectroscopy combined with the topography of the SPM makes TERS a powerful tool for the investigation of nanometrical features. At the present, however, no commercially available TERS probe can provide reliable and reproducible results with high Raman enhancement.8 | Abstract With this thesis work we explored the realization of a TERS probe based on a semiconductor NW grown epitaxially on the apex of an AFM cantilever. This design, compatible with the commercially available equipment, aims at the use of the plasmonic resonance created in the noble metal nanoparticle present on the top of the nanowire to greatly enhance the Raman signal. The high aspect ratio of this nanostructure can lead to high-resolution topography and spectroscopy. We will first introduce the basics of SPM and give an example of a study of cells by AFM in Chapter 1: the effect of the uptake of asbestos fibers and carbon nanotubes by mesothelial cells is reported. In Chapter 2 we briefly present the growth mechanics for Si nanowires, with a summary of the results obtained for Si NWs. A study of the citotoxicity of ZnSe and Si nanowires follows: living cells were seeded on nanowires and their proliferation, behaviour and adhesion was measured as a mean to verify the compatibility of NWs with the imaging of living cells. Chapter 3 reports Raman measurements of GaAs NWs and the change in crystal structure of these upon annealing at high temperatures. Studies of the SERS effect on semiconductor nanowires are presented in Chapter 4: the plasmonic resonance on ZnSe, Si and GaAs NWs was modelled by Finite Element Method. The absorption spectra and the Raman enhancement factor of the same wires were measured and an understanding of their SERS capability is presented. Finally we propose in Chapter 5 a novel fabrication process for the localized growth of NWs on AFM cantilevers as TERS tips. Appendix A reports a brief explenation of the fabrication processes mention along the thesis presentation.
XXVI Ciclo
1984
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KANDYBA, VIKTOR. "Electronic structure of single and few layered graphene studied by angle resolved photoemission spectro-microscopy." Doctoral thesis, Università degli Studi di Trieste, 2018. http://hdl.handle.net/11368/2929830.
Анотація:
This thesis reports the study of electronic band structure of single and few layered graphene grown by thermal decomposition of SiC at the surface and by C-sublimation on Ru single crystals. Growth conditions were optimized in order to obtain big few micrometer sized graphene domains. For the first system twisted multilayer graphene domains were found and chosen for study. On ruthenium only single layer graphene domains and also the domains with incorporated bilayer patches were obtained and their electronic properties were investigated after oxidation-reduction reactions at graphene/Ru interface. The electronic band structure was analyzed using high resolution angle resolved photoelectron spectroscopy. In order to obtain spectra from individual domains novel spectromicroscopy end station was used for focusing synchrotron radiation beam to sub-micrometer spot on the sample surface. Experimental results on twisted graphene confirmed interlayer coupling and resulting van Hove singularities, graphene Dirac fermions velocity renormalization and other exotic phenomena predicted by theoretical calculations and partially observed by scanning tunneling spectroscopy technique. Particular attention has been paid to poorly studied interlayer coupling in trilayer systems where middle layer has two different couplings being sandwiched between differently twisted layers. These multilayer graphene domains were also investigated in detail upon alkali metal intercalation and unexpected splitting of upper part of Dirac cone, related to graphene sublattice symmetry breaking in the middle graphene layer was found. In graphene on Ru it was first confirmed that oxidation of Ru under graphene decouples its strongly hybridized π orbitals making graphene p-doped. Our observations indicate that bilayer patches incorporated into single layer background remain n-doped and decorated by intercalated oxygen, thereby forming lateral p-n junctions in the same graphene layer. It was found that hydrogen atmosphere helps to reduce RuOx without the formation of carbon vacancy defects. However, structural wrinkle patterns appeared due to loss of original graphene/Ru epitaxial order remain, and in big graphene domains they can trap H2+RuOx reaction products, making graphene fully decoupled and undoped.
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Ziegler, Cornelia. "Imagerie quantitative de l'assemblage de la NADPH oxydase des phagocytes en cellules vivantes par des approches FRET-FLIM." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLS048/document.
Анотація:
La NADPH oxydase des phagocytes (NOX2) est responsable de la production d’anions superoxydes qui sont les précurseurs des autres formes réactives de l’oxygène. NOX2 est une enzyme majeure de la réponse immunitaire. Les dysfonctionnements de NOX2 sont associés à de nombreuses pathologies et donc il convient d’en comprendre les détails de la régulation. Cette oxydase est composée de cinq sous-unités : deux protéines membranaires, gp91phox et p22phox et 3 protéines cytosoliques p47phox, p67phox et p40phox. D’après les études in vitro avec des protéines purifiées, les protéines cytosoliques sont supposées former un complexe ternaire qui se déplace à la membrane avec une petite protéine G, Rac, au moment l’activation.L’objectif de ce projet est de caractériser les interactions spécifiques entre les sous-unités cytosoliques de NOX2 en cellules vivantes en utilisant le phénomène de transfert résonant d’énergie de type Förster (FRET) entre deux fluorophores, un donneur et un accepteur. Ici les fluorophores seront des protéines fluorescentes de la famille de la GFP. Elles sont fusionnées à deux sous-unités. L’efficacité du FRET dépend de la distance entre les fluorophores et permet ainsi de caractériser les interactions entre les protéines d’intérêt. Une méthode rapide d’identification des situations où le FRET est positif a été mise au point par cytométrie en flux. Des études détaillées et quantitatives ont ensuite été réalisées en utilisant l’imagerie de durée de fluorescence (FLIM) du donneur. Le FLIM, combiné à l’utilisation de donneurs présentant une durée de vie mono-exponentielle, permet de déterminer directement des efficacités de FRET apparentes et moléculaires, qui contiennent, toutes les deux, des informations qualitatives et quantitatives sur l’interaction et la structure des protéines impliquées. De ces données, il est possible d’extraire la fraction des donneurs interagissant avec un accepteur. Les informations obtenues à partir des données de FRET-FLIM permettent une meilleure compréhension de l’organisation et de la régulation de NOX2 tout en permettant une estimation des constantes de dissociation (Kd). Afin de confirmer ces résultats, des expériences de spectroscopie de corrélation de fluorescence à deux couleurs (FCCS) ont été réalisées. Cette méthode complétement indépendante n’est pas basée sur la distance entre fluorophores comme le FRET mais sur leur co-diffusion à travers un petit volume d’observation dans le cytoplasme cellulaire.L’approche FRET-FLIM nous a tout d’abord permis d’observer les interactions entre hétéro-dimères formés de deux sous-unites différentes en cellules vivantes et d’exclure la formation d’homo-dimères entre deux sous-unités identiques. Etant donné la bonne précision des mesures de FLIM, nous avons pu comparer les informations structurales obtenues en cellules avec les données structurales issues d’études sur les protéines purifiées in vitro et nous avons constaté qu’elles sont en bon accord. Nous avons ensuite aligné les structures disponibles pour proposer un premier modèle 3D du complexe cytosolique de la NADPH oxydase au repos dans le cytosol cellulaire.Les fractions de protéines en interaction sont pour tous les hétéro-dimères autour de 20% ce qui n’est pas en accord avec l’hypothèse courante qui propose que toutes les sous-unités cytosoliques soient sous forme de complexe. Toutefois nos premiers résultats de FCCS confirment ce résultat extrait des données de FRET-FLIM. Nous proposons donc que la complexation des sous-unités cytosolique pourrait être impliquée dans la régulation de la NADPH oxydase. Des études complémentaires seront nécessaires pour valider cette nouvelle hypothèse. Les constantes de dissociation Kd estimées à partir de nos résultats sont micromolaires et donc un ordre de grandeur plus élevé que les valeurs nanomolaires déterminées in vitro. Des mesures plus détaillées de FCCS pourront compléter et valider ces résultatsThe phagocyte NADPH oxidase (NOX2) is a key enzyme of the immune system generating superoxide anions, which are precursors for other reactive oxygen species. Any dysfunctions of NOX2 are associated with a plethora of diseases and thus detailed knowledge about its regulation is needed. This oxidase is composed of five subunits, the membrane-bound gp91phox and p22phox and the cytosolic p47phox, p67phox, and p40phox. The latter are assumed to be in a ternary complex that translocates together with the small GTPase Rac to the membranous subunits during activation.Our aim was to discover and to characterize specific interactions of the cytosolic subunits of NOX2 in live cells using a Förster Resonance Energy Transfer (FRET) based approach: Since FRET depends on the distance between two fluorophores, it can be used to reveal protein-protein interactions non-invasively by studying fluorescent protein tagged subunits. To have a rapid method on hand to reveal specific interactions, a flow cytometer based FRET approach was developed. For more detailed studies, FRET was measured by fluorescence lifetime imaging microscopy (FLIM), because it allows a direct determination of the apparent and molecular FRET efficiency, which contains both qualitative and quantitative information about the interaction and the structure of the interacting proteins. Furthermore, the FRET-FLIM approach enables an estimation of the fraction of bound donor. This information itself is important for a better understanding of the organisation and regulation of the NOX2, but it is also necessary for the calculation of the dissociation constant Kd from the FRET-FLIM data. To confirm the findings obtained by FRET-FLIM fluorescence cross correlation spectroscopy (FCCS) experiments were performed. This completely independent method is not based on distances like FRET but on the observation of the co diffusion of the fluorescently labelled samples when they move across a small observation volume inside the cells.The FRET-FLIM approach allowed us in a first step to discover heterodimeric interactions between all cytosolic subunits in live cells. Due to the good precision of the results, we were able to extract structural information about the interactions and to compare them with available structural data obtained from in vitro studies. The information from FRET-FLIM was coherent with in vitro data. We then aligned the available structures leading to the first 3D model of the cytosolic complex of the NADPH oxidase in the resting state in live cells.Additionally, the bound fraction for all heterodimeric interactions derived by FRET-FLIM is around 20 %, which is in contrast to the general belief that all cytosolic subunits are bound in complex. The first FCCS results support our findings. Therefore, we believe that the complexation of the cytosolic subunits could be involved in the regulation of the NADPH oxidase and should be investigated further. The estimated Kd derived from the FRET-FLIM approach is in the low micomolar range, which is an order of a magnitude higher than the nanomolar range of in vitro studies.In conclusion, we showed that our quantitative FRET-FLIM approach is not only able to distinguish between specific and unspecific protein-protein interactions, but gives also information about the structural organisation of the interacting proteins. The high precision of the FRET-FLIM data allow the determination of the bound fraction and an estimation of the Kd in live cells. FCCS is a complementary method, which can verify these quantitative findings. However, it cannot replace FRET-FLIM completely as it does not give any structural information.With respect to the biological outcome of this project, we can propose for the first time a 3D-model of the cytosolic complex of the NADPH oxidase covering the in vitro as well as the live cell situation. Additionally, the small bound fraction found here may raise new ideas on the regulation of this vital enzyme
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Klemm, Hagen William [Verfasser], Thomas [Akademischer Betreuer] Schmidt, Hans-Joachim [Gutachter] Freund, and Frank [Gutachter] Behrendt. "Formation and properties of ultrathin silicon dioxide films on Ru(0001) : an in-situ spectro-microscopy study / Hagen William Klemm ; Gutachter: Hans-Joachim Freund, Frank Behrendt ; Betreuer: Thomas Schmidt." Berlin : Technische Universität Berlin, 2018. http://d-nb.info/1156331250/34.
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Guida, Manrique Leydy Carolina. "Mécanismes contrôlant la séquestration du gadolinium, du rhénium et du sélénium dans des conditions de faible teneur en oxygène." Electronic Thesis or Diss., Université Grenoble Alpes, 2024. http://www.theses.fr/2024GRALU015.
Анотація:
Les éléments traces, malgré leur rareté (moins de 100 parties par million) sur Terre, remplissent diverses fonctions : certains agissent comme des micronutriments, tandis que d'autres, appelés métaux critiques, possèdent des applications industrielles et médicales uniques. Dans les systèmes aquatiques naturels dépourvus d'oxygène, les transferts d'électrons impliquent des réactions biogéochimiques catalysées par le fer, le soufre et les éléments traces. Comprendre leur réactivité dans ces environnements reste un défi. Ma recherche de doctorat se concentre sur combler cette lacune de connaissance concernant trois éléments spécifiques (rhénium (Re), sélénium (Se) et gadolinium (Gd)). Ils existent sous diverses formes chimiques aqueuses dans l'eau : anion monovalent (perrhénate, ReO4—), anion divalent (sélénate, SeO42— et sélénite, SeO32—) ou cation (gadolinium, Gd3+). Le rhénium est un métal critique, tandis que le sélénium est un élément bioessentiel à faibles niveaux et devient toxique à des concentrations plus élevées. Le gadolinium est un élément des terres rares et un métal critique également, en raison de son utilisation étendue comme agent de contraste dans l'imagerie par résonance magnétique (IRM).Ces éléments sont les plus concentrés dans les sédiments marins formés dans des environnements dépourvus d'oxygène. Les phases minérales courantes comprennent la pyrite (FeS2) et la magnétite (Fe3O4), selon la teneur en sulfure dans ces environnements et l'origine (autogène vs détritique, par exemple, à partir de roches volcaniques) des particules. Ma recherche, présentée sur quatre chapitres, étudie les processus de réduction de surface (Re(VII), Se(VI) et Se(IV)) et la sorption (Gd(III)) sur/dans les particules de magnétite et de pyrite. En utilisant diverses méthodes analytiques telles que la spectroscopie XAFS, la spectroscopie STEM-EELS et le MC-ICP-MS, notre étude révèle des voies réactives distinctes. Re(VII) réagit avec l'eau sulfurée pour former des nanoparticules de Re(III, IV, V)2S7, tandis qu'à des concentrations plus faibles, le Re est réduit et incorporé dans les particules, selon des voies caractérisées par une fraction isotopique moindre avec la pyrite qu'avec la magnétite. Nous montrons également que les nanoparticules de pyrite réduisent le Se(VI) et le Se(IV), jusqu'à obtenir du Se(0) en surface ou du Se(-I) en structure, selon que l'adsorption ou la co-précipitation se produit. Enfin, le Gd se substitue au Fe(III) dans les nanoparticules de magnétite jusqu'à une substitution de 5% de Fe par Gd. Nous tentons d'unifier le comportement d'affinité de ces éléments traces et d'autres avec les sédiments riches en Fe anoxiques à la lumière du principe des acides et des bases durs et mous.L'étude apporte de nouvelles perspectives sur les mécanismes qui régissent la séquestration des métaux et métalloïdes dans les environnements sédimentaires. La signification de cette recherche réside dans sa pertinence pour les entreprises scientifiques et technologiques contemporaines, en particulier pour comprendre comment les processus dans les systèmes riches en Fe et en sulfures fonctionnent, tels que les éléments traces, la mobilité du Fe et du S, l'équilibre des masses dans les cycles sédimentaires mondiaux, jusqu'à l'exploration, l'exploitation minière et le recyclage des gisements potentiels de métaux. De plus, elle améliore notre compréhension actuelle de l'utilisation des proxies paléoenvironnementaux pour reconstruire la formation de la Terre. Enfin, cette étude a également des implications pour le traitement des déchets nucléaires et de la pollution, en particulier dans la gestion de la contamination par le sélénium (Se) et le gadolinium (Gd)Trace elements, despite their scarcity (less than 100 parts per million) on Earth, serve diverse purposes: some act as micronutrients, while others, known as critical metals, possess unique industrial and medical applications. In oxygen-deprived natural aquatic systems electron transfers involve biogeochemical reactions catalyzed by iron, sulfur and trace elements. Understanding their reactivity in these environments remains a challenge. My Ph.D. research focus on filling this knowledge gap concerning three specific elements (rhenium (Re), selenium (Se), and gadolinium (Gd)). They exist in various chemical aqueous species in water: monovalent anion (perrhenate, ReO4—), divalent anion (selenate, SeO42—and selenite, SeO32—) or cation (Gadolinium, Gd3+). Rhenium is a critical metal, while selenium is a bioessential element at low levels, and becomes toxic in higher concentrations. Gadolinium is a rare earth element and a critical metal as well, due to its wide use as a contrast agent in magnetic resonance imaging (MRI).These elements are most concentrated in marine sediments formed in oxygen-deprived environments. Common mineral phases include pyrite (FeS2) and magnetite (Fe3O4) depending on sulfide content in those environments, and origin (autogenic vs. detritic, e.g., from volcanic rocks) of the particles. My research, presented across four chapters, investigates surface reduction (Re(VII), Se(VI) and Se(IV)) and the sorption (Gd(III)) processes on/into magnetite and pyrite particles. Employing various analytical methods such as XAFS spectroscopy, STEM-EELS spectro microscopie and MC-ICP-MS, our study reveals distinct reactive pathways. Re(VII) reacts with sulfidic water to form Re(III, IV, V)2S7 nanoparticles, while at lower concentrations Re is reduced and incorporated into particles, in different pathways characterized by less isotopic fractionation with pyrite than with magnetite. We also show that pyrite nanoparticles reduce Se(VI) and Se(IV), down to surface Se(0) or structure Se(-I) depending on whether adsorption or co-precipitation occurs. Lastly, Gd substitutes for Fe(III) in magnetite nanoparticles up to 5% Fe substitution by Gd. We attempt to unify the affinity behaviour of these and other trace elements with anoxic Fe-bearing sediments in the light of the hard and soft acids and bases principle.The study provides new insights into the mechanisms that govern the sequestration of metals and metalloids in sedimentary settings. The significance of this research lies in its relevance to contemporary scientific and technological endeavours, particularly in understanding how processes in Fe and sulfidic systems work like trace elements, Fe and S mobility, mass balance in the global sedimentary cycles to the exploration, mining and recycling of potential repositories of metals. Furthermore, it enhances our current understanding of the use of palaeoenvironmental proxies to reconstruct the Earth's formation. Finally, this study also has implications for the treatment of nuclear waste and pollution, particularly in the management of selenium (Se) and gadolinium (Gd) contamination
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Partouche, David. "Analyse de l’assemblage de peptides amyloïdes bactériens." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLX084/document.
Анотація:
Hfq est une protéine bactérienne qui a un rôle pleiotropique. La principale fonction de la protéine Hfq bactérienne consiste à répondre aux stress que peut rencontrer la bactérie lors d’un changement environnemental, en utilisant essentiellement un contrôle post-transcriptionnel. La protéine, par sa capacité à interagir avec les ARN et notamment les petits ARN non codant, permet ainsi une régulation rapide de l’expression génétique. En outre la protéine interagit aussi avec l’ADN qu’elle aide à se structurer. Les mutations dans le gène qui code pour Hfq ont des effets pleïotropes (déterminant plusieurs caractères phénotypiques).D’un point de vue structural, la protéine adopte un repliement de type Sm, caractérisé par un oligomère toroïdal reposant sur la formation d’un feuillet β continu à 30 brins. Cependant, outre cette région Sm N-terminale, Hfq possède également une région C-terminale (CTR) de taille et de séquence variables selon les bactéries. Mon travail de thèse a porté sur l’analyse de cette région CTR chez la bactérie Escherichia coli. Cette région a en effet la capacité de former une structure de type amyloïde : structures auto-assemblées in vivo, à proximité de la membrane interne et dans le nucléoïde.Par l’utilisation de diverses techniques physico-chimiques (microscopie moléculaire, spectroscopie et microscopie infrarouge, dichroïsme circulaire et diffusion aux petits angles), mon travail a consisté à caractériser l’assemblage de cette région de Hfq ainsi que les facteurs l’influençant en particulier la présence d’acide nucléique. Une partie de mon travail de thèse a aussi consisté à mettre en place une méthode d’imagerie corrélative innovante permettant d’analyser la signature chimique et morphologique d’une fibre amyloïde unique. Mon travail a enfin porté sur l’analyse de l’effet de composés inhibant l’agrégation de la structure amyloïde, ce qui pourrait constituer une piste pour développer une nouvelle classe d’antibiotiquesHfq is a pleiotropic bacterial protein that determines several phenotypic characteristics. Its main function is to facilitate responses to stresses that bacteria may encounter during environmental changes, mainly by using post-transcriptional genetic control. The protein, by its capacity to interact with RNA, in particular small non-coding RNA, enables a rapid regulation of gene expression. In addition, the protein also interacts with DNA and compacts it. From a structural point of view, the protein adopts an Sm-like fold, characterized by a toroidal oligomer formed by a continuous 30-stranded β-sheet. Besides its conserved N-terminal Sm domain, Hfq also possesses a C-terminal region (CTR) that can vary in size and sequence between bacteria. My PhD work focused on the analysis of this CTR region in Escherichia coli bacteria. Indeed, this region has the capacity to form an amyloid structure. This structural dynamic is related to the formation of self-assembled structures in vivo, in the proximity of the inner membrane and in the nucleoid.Using various physicochemical techniques (molecular microscopy, spectroscopy and infrared microscopy, circular dichroism and small angle X-ray scattering), my work consisted in characterizing the assembly of this region of Hfq, as well as the factors influencing its assembly (in particular, the presence of nucleic acids). A part of my work consisted in setting up an innovative correlative–imaging method to analyze the chemical and morphological signature of a single amyloid fibre. Finally, my work focused on the analysis of the effect of compounds that inhibit the aggregation of the amyloid structure, which could constitute a new way to develop a novel class of antibiotics
9
Badjeck, Vincent. "Etude par spectro-microscopie électronique d'aciers ODS non irradiés et implantés par hélium." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLS086.
Анотація:
Des aciers renforcés par dispersion de nano-particules d'oxide de titane et d'yttrium (Y-Ti-O ODS), irradiés et non irradiés, ont été éxaminés par microscopie électronique en transmission à balayage couplée à la spectroscopie de perte d'énergie des électrons (STEM-EELS) pour étudier leurs structures chimiques et les effets des radiations. Des méthodes analytiques telles que l'analyse statistique multivariée (MVA) et l'ajustement de courbes sur les spectres EELS sont utilisées afin de réaliser une quantification élémentaire ou d'étudier les structures fines des seuils (ELNES). Les traitements MVA permettent d'extraire les réponses spectrales indépendantes des spectre-images (SI) pour mieux comprendre la distribution spatiale des états de valence des différentes expèces. L'observation de poudres d'ODS après le broyage (MA) montre que les nano-particules (NPs) précipitent durant le traitement thermique qui suit, (consolidation). Pour les échantillons consolidés et non irradiés, les particules de taille moyenne (> 3-4 nm) adoptent une structure pyrochlore imparfaite (Y2Ti2O7-d) avec une structure coeur-coquille (Y-Ti-O)-Cr complétée par une couche de Ti réduit également dépourvue en Y. Une ségrégation de Cr est également observée aux joints de grains. Le ratio O/Ti de 3.2 et la non homogénéité de la distance entre plans (222) est due à des défauts dans la structure de la particule, confirmant ainsi qu'elles présentent de nombreux défauts et sont non stoechiométriques. L'ICA nous permet de générer des cartes d'état de valence mais aussi d'extraire une réponse interfaciale Ti-Cr; à l'interface, les atomes Ti et Cr diffusent sur une distance de quelques Å. Pour les plus petites particules, nos résultats montrent qu'elles peuvent consister soit en une structure pyrochlore hautement déficiente en oxygène (Y2Ti2O6+d) soit en une structure chimique inconnue YaTibOc. Le ratio O/Ti diminue de 3-3.5 vers des valeurs inférieures à 1 pour des tailles allant de 4 à 1.8 nm. Les plus grandes particules (de quelques dizaines à quelques centaines de nm), des oxides et/ou nitrures Ti-O, N-Ti, Y-Ti-O ne représentent qu'une faible proportion du nombre total des NPs (< 1%). Pour étudier les effects des irradiations aux neutrons, un certain nombre d'échantillons ODS furent implantés avec des ions He+ et irradiés avec des ions Fe+. Après l'irradiation et l'implantation, une distribution homogène de bulles d'He à haute pression est observée ainsi que des déplétions, ségrégations et précipitations de Cr induites par irradiation (RID, RIS et RIP). Les bulles sont fréquemment observées piégées à l'interface NP-matrice, cependant elles sont aussi observées piégées par des dislocations, libres dans la matrice et aux joints de grains. Le seuil He-K (21.218 eV pour les atomes libres) se déplace vers des énergies plus hautes (ΔE = 0.5 à 4 eV); nous montrons que ce déplacement est corrélé avec la densité d'He. La quantification de l'He est réalisée à l'aide de trois méthodes différentes: différence spatiale, ajustement de courbes, MVA. Les valeurs de la densité et de la pression atteignent 100 nm-3 et 8 GPa respectivement. Cependant, avec des barres d'erreur pouvant atteindre 30%, les mesures de la pression sont plutôt semi-quantitatives. La méthode d'ajustement de courbes permet une cartographie de la position et de l'intensité du pic He-K et donc une cartographie de la densité pour des bulles individuelles. Les réponses spectrales de bulles individuelles peuvent être extraites d'un SI contenant plusieurs bulles à différentes densités en utilisant l'ICA ou l'analyse de la composante vertex (VCA). Nos mesures montrent que les bulles plus grandes que 4 nm sont sous préssurisées ou à l'équilibre avec la matrice Fe-Cr. En dessous de 3.5 nm, la pression de l'He augmente rapidement, correspondant à un état surpressuriséIrradiated and non-irradiated (Y-Ti-O) oxide-dispersion-strengthened (ODS) steels are investigated by scanning transmission electron microscopy coupled with electron energy-loss spectroscopy (STEM-EELS) to study their chemical structure and the effects of radiation. Analytical methods such as multivariate statistical analysis (MVA) and EELS curve-fitting are carried out to achieve elemental quantification or study the edge fine structures (ELNES). Using MVA, the spectrum-images (SI) can be separated into independent spectral responses to gain insights into the valence state of various elements such as Ti or Cr. Investigations on post-mechanical-alloyed (MA) powders show that the nanoparticle (NP) precipitation occurs only after a further high-temperature treatment (consolidation). In non-irradiated consolidated samples, medium-sized NPs (> 3-4 nm) are found to adopt a Y2Ti2O7-d defective pyrochlore structure with a (Y-Ti-O)-Cr core-shell structure with a reduced-Ti layer also depleted in Y. Cr is also shown to segregate to the grain boundaries in non-irradiated samples. The measured O/Ti ratio of 3.2 found for medium-sized NPs and the observed non-homogeneity of the inter-reticular distance d222 through the particle is interpreted as being due to defects in the particles’ structure; it is indeed confirmed that Y2Ti2O7 medium-sized NPs in ODS steels present numerous defects and are non-stoichiometric. The Ti oxidation state is shown to vary from the centre of the NPs to their periphery from Ti4+ in distorted Oh symmetry to a valency often lower than 3+. Independent component analysis (ICA) allows us to generate bonding maps and extract a Ti-Cr interfacial response. An inter-diffusion of Ti and Cr atoms is observed at this interface. The smallest NPs present a different and ill-defined structure and interface with the Fe-Cr matrix. They either consist of a highly oxygen-deficient pyrochlore structure (Y2Ti2O6+d) or an unknown YaTibOc chemical structure. The O/Ti ratio decreases from 3-3.5 to below 1 for an NP size going from 4 to 1.8 nm. A few large particles (sized from tens to hundreds of nm) present a N-Ti-O or Ti-O chemistry but represent only a small percentage of all the NPs (< 1%). To study the neutron irradiation-induced changes, a number of ODS samples were implanted with He+ ions and irradiated with Fe+ ions. After irradiation, they display a homogeneous distribution of high-pressure He bubbles and radiation-induced Cr depletion, segregation and precipitation (RID, RIS and RIP). The He bubbles are frequently trapped at the NP-matrix interface, although bubbles can exist freely in the matrix, trapped by dislocations and at grain boundaries. The He-K line (21.218 eV for free atoms) shifts to higher energy in the bubbles (ΔE = 0.5 to 4 eV); this is shown to be correlated with the He density. He quantification is carried out with three different methods: spatial difference, curve-fitting and MVA. The density and pressure values are found to reach 100 nm-3 and 8 GPa respectively, although the pressure measurement is only semi-quantitative given that the error bars can reach 30%. The curve-fitting method allows us to map the He-K energy position and intensity, yielding the density, in individual bubbles. The spectral response of individual bubbles can be separated in an SI containing many bubbles at different densities using ICA or vertex component analysis (VCA). Bubbles larger than 4 nm are shown to be under-pressurized or at equilibrium with the Fe-Cr matrix. Below 3.5 nm, the He pressure is shown to increase markedly, passing into the over-pressurised regime
10
VIRGA, ALESSANDRA. "Ultrafast spectro-microscopy of highly excited low dimensional materials." Doctoral thesis, 2019. http://hdl.handle.net/11573/1251453.
Анотація:
Born-Oppenheimer approximation (ABO) is the assumption that the motion of atomic nuclei and electrons in molecules can be separated and independently treated.
In solids, ABO is well justified when the energy gap between ground and excited electronic states is larger than the energy scale of the nuclear motion. Graphene represents a notable exception of this acceptantance. In particular, here we unravel the key role of the gapless linear Dirac dispersion in the vibrational Raman response of the system in the case of impulsively photoexcited graphene.
First, we unambiguously describe Four-Wave Mixing (FWM) processes in graphene, which depend on the resonant nature of the electronic interactions. Indeed, the overall spectral response is described in terms of a third order diagrammatic description of the light-matter interaction. We disclose that the interference between Coherent anti-Stokes Raman Scattering (CARS) and Non-Vibrationally Resonant Background (NVRB) generates Lorentzian dip spectral profiles. Actually, by introducing an experimental time delayed FWM scheme, able to modify the relative strength of the two contributions, we observe the first evidence of CARS peak equivalent to the Raman spectrum in graphene. Second, we adopt sub picosecond photoexcitation which impulsively localize energy into graphene electronic subsystem. While the response of hot charge carriers is well-characterized, unraveling the behavior of optical phonons under strongly out-of- equilibrium conditions remains a challenge. Using a 3-ps laser excitation, which trades off between impulsive stimulation and spectral resolution, we show how the Raman response of graphene can be detected in presence of an electronic subsystem temperature largely exceeding that of the phonon bath. We find a peculiar behaviour of the period and lifetime of both the G and 2D phonons as function of the carriers temperature in the range 1700-3100 K, suggesting a broadening of the Dirac cones.
Accordingly, we reconsider the traditional scenario of the electron-phonon scattering in a highly excited transient regime
Частини книг з теми "Spectro-Microscopy":
1
Yagi, K., Y. Tanishiro, and H. Minoda. "Spectro-microscopy by TEM-SEM." In Nanoscale Spectroscopy and Its Applications to Semiconductor Research, 11–23. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/3-540-45850-6_2.
2
Ade, H., and C. H. Ko. "Scanning Spectro-Microscopy with 250 to 800 eV X-Rays." In Chemical, Structural and Electronic Analysis of Heterogeneous Surfaces on Nanometer Scale, 53–74. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5724-7_4.
3
"Infrared Spectro-microscopy." In Encyclopedia of Biophysics, 1048. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-16712-6_101144.
4
Aizawa, T., A. Mitsuo, and J. Kihara. "Acoustic spectro-microscopy of Al-implanted Ni and Ni alloys." In Laser and Ion Beam Modification of Materials, 495–98. Elsevier, 1994. http://dx.doi.org/10.1016/b978-0-444-81994-9.50105-6.
Тези доповідей конференцій з теми "Spectro-Microscopy":
1
Kovac, J., S. Günther, A. Kolmakov, L. Casalis, L. Gregoratti, D. Lonza, M. Marsi, and M. Kiskinova. "Photoemission spectro-microscopy at ELETTRA." In The fourteenth international conference on the application of accelerators in research and industry. AIP, 1997. http://dx.doi.org/10.1063/1.52553.
2
Sadowski, Jerzy T. "Electron spectro-microscopy of 2D materials." In Low-Dimensional Materials and Devices 2020, edited by Nobuhiko P. Kobayashi, A. Alec Talin, Albert V. Davydov, and M. Saif Islam. SPIE, 2020. http://dx.doi.org/10.1117/12.2568816.
3
Ideguchi, Takuro, Simon Holzner, Birgitta Bernhardt, Guy Guelachvili, Nathalie Picqué, and Theodor W. Hänsch. "Coherent anti-Stokes Raman dual-comb spectro-microscopy." In CLEO: Science and Innovations. Washington, D.C.: OSA, 2013. http://dx.doi.org/10.1364/cleo_si.2013.ctu3h.2.
4
Yi, Minwoo, Kanghee Lee, Jin-Dong Song, and Jaewook Ahn. "Sub-wavelength terahertz microscopy using spectro-temporal phase analysis." In 2011 36th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2011). IEEE, 2011. http://dx.doi.org/10.1109/irmmw-thz.2011.6105089.
5
Huang, Guan-Jie, Pei-Chen Lai, Ming-Wei Shen, Jia-Xuan Su, Jhan-Yu Guo, Kuo-Chuan Guo, Peng Lin, et al. "Stimulated Raman scattering spectro-microscopy using multiple-plate continuum." In Label-free Biomedical Imaging and Sensing (LBIS) 2023, edited by Natan T. Shaked and Oliver Hayden. SPIE, 2023. http://dx.doi.org/10.1117/12.2647696.
6
Potts, A. W. "Polycrystalline metal surfaces studied by X-ray photoelectron spectro-microscopy." In Sixth international conference on x-ray microscopy (XRM99). AIP, 2000. http://dx.doi.org/10.1063/1.1291156.
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Brotosudarmo, Tatas Hardo Panintingjati, Arif Agung Wibowo, Heriyanto Heriyanto, and Marcelinus A. S. Adhiwibawa. "Single cells diatom Chaetoceros muelleri investigated by homebuilt confocal fluorescence spectro-microscopy." In Third International Seminar on Photonics, Optics, and Its Applications (ISPhOA 2018), edited by Agus M. Hatta and Aulia M. Nasution. SPIE, 2019. http://dx.doi.org/10.1117/12.2502932.
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Blonskij, Ivan V., V. G. Grytz, V. F. Kozenev, V. A. Thoryk, and V. V. Semenov. "Photoacoustic spectro- and microscopy: new diagnostic methods for materials and devices for electronics." In Optical Diagnostics of Materials and Devices for Opto-, Micro-, and Quantum Electronics: International Workshop, edited by Sergei V. Svechnikov and Mikhail Y. Valakh. SPIE, 1994. http://dx.doi.org/10.1117/12.191990.
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Grenci, Gianluca. "IR-live: plastic microfluidic devices for infrared spectro-microscopy of living cells ." In The 7th International Multidisciplinary Conference on Optofluidics 2017. Basel, Switzerland: MDPI, 2017. http://dx.doi.org/10.3390/optofluidics2017-04555.
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Bahou, Mohammed, Li Wen, Xiande Ding, B. Didier F. Casse, Sascha P. Heussler, Pengda Gu, Caozheng Diao, et al. "Infrared Spectro/Microscopy at SSLS — Edge Effect Source in a Compact Superconducting Storage Ring." In SYNCHROTRON RADIATION INSTRUMENTATION: Ninth International Conference on Synchrotron Radiation Instrumentation. AIP, 2007. http://dx.doi.org/10.1063/1.2436133.
Звіти організацій з теми "Spectro-Microscopy":
1
Laskin, Alexander, and Ryan Moffet. Spectro-Microscopy Studies of Atmospheric Particles. Office of Scientific and Technical Information (OSTI), January 2023. http://dx.doi.org/10.2172/1914321.
2
Ghosh, Ishita, Manushree Tanwar, Rajesh Kumar, and C. Malla Reddy. The world of exotic crystals: Raman spectro-microscopy for probing local structure. The Israel Chemical Society, March 2023. http://dx.doi.org/10.51167/acm00045.
3
Paesani, Francesco, and Wei Xiong. Probing the Structure and Dynamics of Fluid Mixtures in Porous Materials Through Ultrafast Vibrational Spectro-Microscopy and Many-Body Molecular Dynamics. Office of Scientific and Technical Information (OSTI), December 2022. http://dx.doi.org/10.2172/1901582.