Literatura científica selecionada sobre o tema "Dépôt sous tension"
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Artigos de revistas sobre o assunto "Dépôt sous tension"
Anzueto, Marc-André. "Instrumentalisation des droits humains en politique étrangère canadienne ?" Études internationales 45, n.º 4 (28 de abril de 2015): 601–24. http://dx.doi.org/10.7202/1030131ar.
Texto completo da fonteJobin, Guy. "Rhétorique, politique et parole croyante". Dossier 67, n.º 3 (5 de abril de 2012): 477–99. http://dx.doi.org/10.7202/1008601ar.
Texto completo da fonteFrydman, Hannah. "Freedom's Sex Problem". French Historical Studies 44, n.º 4 (1 de outubro de 2021): 675–709. http://dx.doi.org/10.1215/00161071-9248720.
Texto completo da fonteSimon, Lionel, Lucienne Strivay, Bernard Charlier e Séverine Lagneaux. "Animaux". Anthropen, 2017. http://dx.doi.org/10.17184/eac.anthropen.054.
Texto completo da fonteGoodale, Mark. "Droits humains". Anthropen, 2019. http://dx.doi.org/10.17184/eac.anthropen.093.
Texto completo da fonteCortado, Thomas Jacques. "Maison". Anthropen, 2020. http://dx.doi.org/10.17184/eac.anthropen.131.
Texto completo da fonteTeses / dissertações sobre o assunto "Dépôt sous tension"
Bachir, Redouane. "Modification de catalyseurs d'hydrogénation à base de palladium par dépôt de fer en sous-tension". Poitiers, 1995. http://www.theses.fr/1995POIT2316.
Texto completo da fonteAlarcon, fernandes previdello Bruno. "Effet de l'orientation sur les nanofilms de Pd/Pt(hkl) : électrodépôt, caractérisation et isothermes électrochimiques de Pd-H Orientation effect on Pd/Pt(hkl) nanofilms". Phd thesis, Université de Grenoble, 2013. http://tel.archives-ouvertes.fr/tel-00820121.
Texto completo da fonteAlarcon, Fernandes Previdello Bruno. "Effet de l'orientation sur les nanofilms de Pd/Pt(hkl) : électrodépôt, caractérisation et isothermes électrochimiques de Pd-H Orientation effect on Pd/Pt(hkl) nanofilms". Thesis, Grenoble, 2013. http://www.theses.fr/2013GRENI003/document.
Texto completo da fonteThe present work focuses on the electro-deposition and characterization of Pd/Pt(hkl) nanofilms and on their properties concerning hydrogen storage. The effects of the nanometric size, of the thickness and of the substrate’s orientation have been studied.Comparing Pd/Pt(111) and Pd/Pt(100) films, distinct features were observed either in the electrodeposition curve or in the electrochemical and ex situ AFM characterizations. Pd/Pt(100) deposits have shown the presence of an UPD process up to two layers, which is a quite uncommon phenomenon. Thicker films show the presence of square based pyramids, following the substrate’s (100) orientation. On the contrary, only the first layer is Under Potentially Deposited in Pd/Pt(111) films and the deposit presents a pseudomorphic character up to about 10 complete layers.Hydrogen absorption into the Pd/Pt(100) nanofilms was studied following a “classical” method in sulphuric acid medium. We have developed a new method using the hanging meniscus rotating disk electrode (HMRDE) to measure the hydrogen insertion into ultra-thin Pd/Pt(111) films, where H insertion and HER (Hydrogen Evolution Reaction) are not well separated. The hydrogen insertion isotherms present some common points between the two studied systems, like smaller value of the maximum hydrogen insertion rate (H/Pd)max compared to bulk Pd, value which decreases with the decrease of the thickness. The two-phase region width decreases with film thickness as well and presents a slope. Such slope has been attribtued to the presence of non-equivalent insertion sites due to substrate induced constraints. Nevertheless, for Pd/Pt(100) the slope is less pronounced and (H/Pd)max value decreases more rapidly with thickness. Its value in correspondence of Pd5ML/Pt(100) is only slightly higher than the αmax insertion rate of bulk Pd
Ullah, Wahid. "Synthèse électrochimique de nanoréseaux métalliques et polymériques au travers de films minces de silice mésoporeuse à canaux verticalement orientés". Electronic Thesis or Diss., Université de Lorraine, 2021. http://www.theses.fr/2021LORR0093.
Texto completo da fonteIn this project we exploited surface modification of electrodes with vertically oriented mesoporous silica thin films, generated by electrochemically assisted self-assembly method. The silica scaffold offers narrow pores diameter around 2-3 nm and 50-150 nm film thickness, a competitive hard template material for the preparation of low dimensional metallic and organic nanopatterns on conducting surfaces. We combined the wealth of mesoporous silica thin film with electrochemistry to obtain surface nanopatterning of the underlying support. Well-adhered and mechanically stable mesoporous silica film is formed on electrodes bearing hydroxyl moieties on their surface, for example indium tin oxide (ITO). However, the adhesion and mechanical stability of mesoporous silica thin film is poor on noble metals such as gold (Au). To ensure uniform surface coverage and good adhesion of the silica film to the Au surface, it was necessary to use a (3-mercaptopropyl) trimethoxysilane (MPTMS) reagent to act as a “molecular glue” thanks to its thiol functionality, which is able to bind to the gold substrate and to its alkoxysilane moieties enabling condensation with the silica material. The MPTMS layer had, however, a significant effect on film permeability to redox probes, depending on the MPTMS treatment time. MPTMS adsorption should be long enough to ensure proper adhesion of the film but not too long to avoid surface blocking or film defects. In addition, Cu underpotential deposition (UPD) experiments revealed that the silica membrane significantly affected the UPD process, suggesting some barrier effect of the porous membrane, but the interface Au/MPTMS/silica is not sharp and allowed metal UPD between the gold substrate and the silica thin film. In the second part of the thesis, mesoporous silica thin films, with two distinct pore diameters (2.0 and 2.9 nm), covered ITO electrodes were used as hard template for the control electrochemical growth of polyaniline (PANI) nanowire arrays. To ensure proper adhesion of PANI to the underlying ITO surface, aniline moieties are first covalently attached to the bottom of mesochannels via electrografting of aminophenyl diazonium cations, serving in a second step as precursors for PANI growth by electropolymerization of aniline through the silica mesochannels. PANI wires remain attached to ITO after removal of the silica membrane, confirming the importance of initial electrografting. Both PANI inside silica template and the free PANI nanowire arrays were electroactive. Spectroelectrochemical study revealed fast electrochromic behavior and cycling stability of PANI nanowire arrays. In last part of the project, some preliminary attempts were made for the electrochemical co-deposition of bimetallic Cobalt/Platinum (CoPt) nanowire arrays onto ITO electrode covered with mesoporous silica films. The presence of Co and Pt in the deposits was confirmed from surface analysis by spectroscopic methods and electrochemical characterization
Diampeni, Kimbakala Siméon. "Modélisation dynamique des décharges se propageant sur des surfaces isolantes polluées avec des dépôts discontinus sous différentes formes de tension". Phd thesis, Ecole Centrale de Lyon, 2007. http://tel.archives-ouvertes.fr/tel-00220521.
Texto completo da fonteDiampeni, Kimbakala Simeon. "Modélisation dynamique des décharges se propageant sur des surfaces isolantes polluées avec des dépôts discontinus sous différentes formes de tension". Ecully, Ecole centrale de Lyon, 2007. http://bibli.ec-lyon.fr/exl-doc/sdiampeni.pdf.
Texto completo da fonteThis work presents an antonomous and dynamic model of prediction of the characteristics of discharges propagating on polluted insulating surfaces in a discontinuous way, based on the energy balance, the equivalent electric circuits, and the physical characteristics of the arc. This model allows to determine the various parameters of the discharge until the flashover by taking into account the insulator geometry, the change of resistance during the propagation, the type of pollution band and its characteristics (conductivity, thickness, width, position compared to the electrodes). The voltage evolution at the head of arc and the voltage drop within the arc are analyzed according to the kind of applied voltage. It is shown that the location of the pollution bands with regards to the electrodes, their widths, their thicknesses and their conductivities (weakly or strongly polluted) have significant influence on the parameters of the discharge. The increase of thickness of the pollution band leads to the increase of the resistance of the arc and to the reduction of the accumulated charge and thus to the decrease of the charging current. Note that the thicker the pollution layer, the shorter the time to flashover of the insulator is. Moreover, the flashover voltage is all the smaller as the flashover time is long. The high conductivity of the pollution layers generates high currents. The higher the ratio between the conductivities of the various bands, the higher the current and the charge are ; this can be explained by the remarkable increase of the radius of the discharge channel. The evolution of velocity follows those of the currents and electrical charges
Benali, Brahim. "De l'élaboration aux propriétés des couches de zircone : mécanismes de stabilisation de la phase quadratique". Paris 11, 2007. http://www.theses.fr/2007PA112242.
Texto completo da fonteOne of the objectives of this thesis, fundamental, is to clarify the understanding of the role of various parameters, internal stresses and chemistry, on the stabilization of the metastable tetragonal phase, and its transformation into the stable monoclinic phase within zirconia thin films deposited by OMCVD. Concerning the stress parameter, a model has been proposed to explain its role. It is based on a coupling between the internal compressive stresses and the crystallite size in regard to the critical size of the phase transformation, notion widely discussed in the literature. For the second parameter, the chemistry, the study was particularly focused on the substrate and oxygen roles. It became clear that the interfacial oxide layer, formed during the heating phase prior to the deposition, had an important role on the growth of zirconia film. Concerning the oxygen influence, it is suggested that, it acts as a catalyst for the phase transformation which occurs more easily in oxygen-rich atmosphere. Besides, the tetragonal phase stabilization in the zirconia thin films deposited by OMCVD is, as in the case of natural layers formed by oxidation, oxygen sub-stoichiometric. The other objective of this thesis, industrial however, consisted in the conception and construction of a new OMCVD reactor. This new reactor allowed us to develop purely tetragonal zirconia layers whose thickness reaches several micrometers. According to our knowledge, it is worth noting that it has not been realised before