Дисертації з теми "Transitional morphologies"
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RICCHIARDI, HERNANDEZ ANA MARIA. "Mapping transitional urban forms The form of the in-formal in Sub-Saharan Africa." Doctoral thesis, Politecnico di Torino, 2022. http://hdl.handle.net/11583/2972206.
Повний текст джерелаHutter, Jeffrey Lee. "Solidification of a liquid crystal, morphologies and transitions." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq24317.pdf.
Повний текст джерелаBarreteau, Cyrille. "Morphologie et énérgetique des surfaces vicinales de métaux de transition." Habilitation à diriger des recherches, Université Pierre et Marie Curie - Paris VI, 2004. http://tel.archives-ouvertes.fr/tel-00006882.
Повний текст джерелаelecrtonique et de potentiels empiriques. Une attention particuliere
est dediee a l'etude de la stabilite des surfaces vicinales vis a vis du facettage.
Ramirez, Marquez Walter. "Relations procédé de synthèse microstructure-morphologie-propriétés des copolymères acrylate de méthyle-styrène." Lyon 1, 1987. http://www.theses.fr/1987LYO19025.
Повний текст джерелаBencheikh, Fatima. "Corrélation entre les propriétés optiques, la structure électronique et la morphologie des semi-conducteurs organiques pi-conjugués." Thesis, Aix-Marseille, 2015. http://www.theses.fr/2015AIXM4362.
Повний текст джерелаThe development of organic photovoltaic cell technology requires various skills related to the molecular engineering, interface engineering, controlling and characterizing the morphology of the films, device structure optimization and understanding of photophysics of the materials. In this context, the work presented in this thesis contributes to the understanding of the photophysical properties of π-conjugated organic materials and propose optical characterizations tools for probing the morphology of these materials. First, a rigorous methodology for determining refractive indices of organic films by ellipsometry has been proposed. The models used in ellipsometry have been chosen by taking into account the physical properties of π-conjugated organic materials which allow the determination of the electronic structure of fullerene derivatives (PC60BM and PC70BM). Secondly, we associated ellipsometric data to complementary measurements of absorbance and photoluminescence in the case of two copolymers (PTB7 and PTB7-Th) in films and solutions in order to isolate inter and intra-chain interactions. We have demonstrated that the photophysics of these copolymers differs from the P3HT. We have shown that even in solution in chlorobenzene, the PTB7 PTB7-Th aggregate strongly. These aggregates, H-type, break more easily in the chlorobenzene solutions based of PTB7-Th as in those based on PTB7
GRAYER, VALERIE. "Structure, morphologie et transitions de phase cristal / cristal des copolymeres ethylene / monoxyde de carbone strictement alternes." Université Louis Pasteur (Strasbourg) (1971-2008), 1996. http://www.theses.fr/1996STR13095.
Повний текст джерелаBrunet, François. "Etudes des modes de déformation angulaire des molécules tétraédriques XY4 : prédiction de transitions multiphotoniques du silane." Dijon, 1991. http://www.theses.fr/1991DIJOS003.
Повний текст джерелаBinotto, Ghislain. "Poudres d’oxydes de métaux de transition à texture, morphologie et taille contrôlées : de l’électrochimie à la catalyse." Amiens, 2008. http://www.theses.fr/2008AMIE0127.
Повний текст джерелаThe Li-ion battery technology is so far the best candidate to match the growing demand for portable and automotive power sources. The recent focus on nanomteric electrode materials for Li-ion cells leads us to consider Co3O4 precipitated in aqueous solution (Co3O4-P). This material is made of crystallized nanometric particles (40 Å), forming porous micrometric agglomerates exhibiting a very narrow porosity distribution. A structural investigation shows a partial cationic delocalization in 16c and 48f sites, in an extent inversely proportional to the size of the coherent domains. The powder texture is maintained, and therefore the optimum electrochemical performances, are obtained through the oxide/carbon mixing in suspension in a solvent. A capacity of more than 600 mAh/g is reached along twenty cycles. The first cycle irreversible capacity is equivalent to that of micrometric materials, suggesting that the formatting step is not responsible for this irreversibility, partially attributed to the formation of -CoO. The drop in capacity along cycling is mostly due to the dissolution of the active material in the electrolyte, and to the effects of the irreversible decomposition of the solvent. Different kinetic decomposition tests (NH3, toluene, H2O2, CO) demonstrated the catalytic efficiency of Co3O4-P. Preliminary catalytic and electrochemical results for Co3O4-P and post-annealed materials as catalysts in Li/O2 batteries, mainly regarding the lowering of the cell polarization, let us consider this set of materials as an ideal tool for bridging the electrochemistry and catalysis domains
Braconnier, Céline. "Improbable cité : Paris et la transition démocratique au début de la troisième république : étude de morphologie politique." Paris 1, 1998. http://www.theses.fr/1998PA010254.
Повний текст джерелаThis dissertation queries the processes at work in the political construction of the capital and assesses their impact on the local configuration of paris. It gives an account of the conflict which at the start of the third republic opposed the Parisians, led by the groupe d'autonomie communale to those who, increasingly greater in number as democratisation gradually set in, claimed to have a leading national role in the destiny of the city : state representatives, elected members of the nation, but also men of letters or members of associations. It sets out to show how the nationalisation of paris, whose achievement ousts the urban democracy of legitimate political interests, gradually becomes acceptable to parisians when, at the turn of the century, the local cultural and political arena itself became the relay for identity proposals founded upon the rejection of citizenship. Through exclusion in the form of a refusal to take a part, the general self-overestimation of Parisians learning to draw benefit from the identification of paris with France made up for the frustrations caused by their political end
Smirnova, Vera. "Urban systems dynamics and emergent morphologies under the neoliberal socio-economic restructuring: Moscow and Shenzhen as case studies." Thesis, Kansas State University, 2014. http://hdl.handle.net/2097/17823.
Повний текст джерелаDepartment of Architecture
R. Todd Gabbard
In recent years urban planners have seen critical changes in the scales, pace, and trends of urbanization, resulting in suppressed urban patterns and the emergence of distinctive types of urban dynamics. A possible interpretation of this process is that it represents a “radical socio-spatial restructuring under the regime of global neoliberalization”, a phenomenon that is being widely discussed by many influential planners, urban geographers, and sociologists. My overarching research agenda is to develop a new analytical framework for comparative quantitative analyses of neoliberal urbanization pressures that cause the emergence of distinct patters of urban dynamics and morphologies. By comparing different experiences of ongoing urban transformations around the world and studying the mechanisms of their emergence, we can identify contemporary trends, monitor critical changes and shape a better future for our cities. Using China as a basis of comparison, my thesis seeks to challenge the unproductive and homogeneous patterns of urban dynamics that emerged during neoliberalization in Russia. The controversial and extremely heterogeneous model of Chinese urbanization cannot be applied universally, but valuable lessons can be derived. My work aims to explore specifics of two different patterns of neoliberal transitions in Moscow (Russia) and Shenzhen (China) in 1992 and 1978 respectively. By focusing on detailed scales of restructuring of urban settlement typologies I identify the characteristics of socio-spatial patterns prior to confronting the transition and its resulting outcomes. While considering potential context specific properties of East Asian urbanization, I am making an attempt to extrapolate this vernacular experience into generalized theory. Connecting and quantifying local and global dimensions of urban transformations helps me build a comprehensive theoretical and quantitative framework for a more profound understanding of ongoing socio-spatial restructuring.
Rivière-Cantin, Sophie. "Morphologie et propriétés élastiques de phases hexatiques dans des films monomoléculaires d'acides gras." Phd thesis, Université Pierre et Marie Curie - Paris VI, 1995. http://tel.archives-ouvertes.fr/tel-00001108.
Повний текст джерелаVignaud, Guillaume. "Etude par réflectivité et diffusion des rayons X de la mise en ordre et de la morphologie de surface de films minces de copolymères PS-PBMA." Le Mans, 1997. http://www.theses.fr/1997LEMA1017.
Повний текст джерелаPaineau, Erwan-Nicolas. "Transitions de phases dans les argiles : influence de la minéralogie et de la morphologie : comportement sous écoulement et sous champs." Thesis, Vandoeuvre-les-Nancy, INPL, 2011. http://www.theses.fr/2011INPL005N/document.
Повний текст джерелаThe aim of this work is to study sol-gel and isotropic-nematic phases transitions in suspensions of dioctahedral smectites depending on the morphology and mineralogical nature of clays. Although all the systems studied exhibit a sol-gel at low volume fraction, the liquid-crystalline isotropic-nematic transition could be identified only in the case of smectites with tetrahedral charge deficit. The effect of charge location on the colloidal behavior was determined using small-angle X-ray scattering (SAXS) and rheological measurements. The nature of electrostatic interactions in these suspensions is purely repulsive and rejects the idea of the so-called “house of card” network. However, smectites with a charge deficit located in the tetrahedron are more repulsive and their viscoelastic properties are lower than octahedrally substituted clays. It was also shown that the particle size dependence of the volume fraction corresponding to the sol-gel transition c was related to a simple statistical hydrodynamic trapping of clay platelets. Finally, the application of external fields (electric and magnetic) has resulted in the alignment of the nematic phase while in the isotropic phase, the electric field induces a perfect antinematic order. To preserve the induced alignment, these suspensions were polymerized under the field to obtain perfectly aligned and patterned nanocomposites
Boualam, Mohamed. "Oxydation d'alliages FeCrAl : influence de quelques facteurs sur la structure et la morphologie des couches formées." Compiègne, 1992. http://www.theses.fr/1992COMPD465.
Повний текст джерелаGoapper, Sylvain. "Morphologie de surface et ordre chimique : Faces vicinales d'alliage cuivre-palladium." Phd thesis, Université de Marne la Vallée, 1998. http://tel.archives-ouvertes.fr/tel-00243115.
Повний текст джерелаLa diffraction de rayons X à l'ESRF nous a permis d'observer l'apparition du désordre chimique à la surface et l'évolution simultanée du changement de structure des marches. On observe que la séparation des paires de marches évolue proportionnellement à la composante parallèle du paramètre d'ordre dans le plan de surface.
Pour des temps courts de mise en ordre, le STM montre une structure en domaines, des marches appariées. On identifie les frontières entre domaines par le dédoublement local des paires de marches. Ce phénomène traduit l'émergence à la surface de parois. Cette structure en domaine, caractéristique de l'ordre chimique dans les premiers plans de surface, nous a permis, par STM et diffraction d'hélium, de suivre la cinétique de mise en ordre en présence d'une surface. La taille caractéristique des domaines évolue avec le temps de recuit en A(T).t1/2. Un diagramme d'Arrhénius du facteur d'échelle temporel A(T) a permis de mesurer une énergie d'activation de mise en ordre de 2 eV à la surface ainsi qu'en volume.
Dans une seconde étude, nous avons caractérisé l'influence du dépôt de palladium sur une surface vicinale de cuivre. Nous avons montré par diffraction d'hélium que cet alliage de surface provoque un appariement des marches similaires à celles observées sur l'alliage massif Cu3Pd. Cependant, cette modification de la distribution des marches présente un faible degré d'ordre qui peut être du à l'absence d'ordre chimique à longue distance.
Leblanc, Nathalie. "Membranes asymétriques à base d'un polyimide fluoré : relation entre conditions d'élaboration, morphologies et performances en perméation gazeuse." Rouen, 2000. http://www.theses.fr/2000ROUES057.
Повний текст джерелаPeng, Haonan. "Synthesis of spin crossover micro-and nano-particles and study of the effect of their sizes and morphologies on their bistability properties." Thesis, Toulouse 3, 2015. http://www.theses.fr/2015TOU30082/document.
Повний текст джерелаNowadays, the idea that molecule can be used as an active element in an electronic device stimulates scientific activity of chemistry and physics laboratories worldwide. The information storage capacity from technological demands is growing exponentially, which relies much on the development of nanosciences. The objective is to store data as quickly as possible in a device as small as possible. One of the most promising strategies is based on the concept of molecular bistability, the switching between two electronic states of a molecule in the same way that a binary switch. It is thus possible to pass in a reversible and detectable manner from one state (OFF = 0) to another state (ON = 1) under the influence of a controlled external stimulus. The spin transition (ST) phenomenon that switches the system between high spin (HS) and low spin (LS) states is a typical example of molecular bistability. The two states can be distinguished with different magnetic, optical and structural properties and can be induced by an external perturbation like the temperature, the light, the pressure, a magnetic field or the inclusion of a guest molecule. When the structural changes associated with the spin transition are transmitted in a cooperative manner across the network molecules, the transitions will occur with steepness and possibly accompanied by hysteresis loop (the first order transition). So, spin transition molecular materials should offer many opportunities in terms of applications in the field of electronics, information storage, digital display, photonics and photo-magnetism. Among the different families of compounds, coordination polymers arouse much interest due to their bistability near room temperature. The judicious choice of ligands and counter-anions make possible to modulate the final properties of these compounds and even in some cases to synergistically combine different physical properties. The work developed in this thesis attempt to address the different issues related to the challenge of coordination polymers based nanoscale materials with spin transition. The synthesis of inorganic bistable materials, their development in micro- and nanoparticles, thin layers, their organization and their physical properties are shown. The materials in the microscopic scale have mostly the same physical properties as those measured at the macroscopic scale. However, at the nanoscale, materials can exhibit physical properties that are far from those of bulk compounds. It is therefore imperative to understand more about the phenomena related to material size decrease to develop nanotechnology. The fundamental study of these nanomaterials is necessary and represents a major challenge today, which is of prime importance for the development of future applications. The development of nanoscale materials through the control of certain systematic models permits to improve our understanding of specific effects at the nanoscale. For example, in the case of spin crossover complex, the most important question is: how downsizing effect influences the transition temperature, the cooperativity and the width of hysteresis loop? In this context, this thesis is devoted to the design and the synthesis of various size spin crossover nano and micro-materials with different morphologies. To accomplish this, we developed the reverse-micelle technique and adopted innovative matrix-free synthetic approaches
Murray, Stéphane. "Analyse d'images appliquée à la texture des polymères cristaux liquides." Nice, 1990. http://www.theses.fr/1990NICE4385.
Повний текст джерелаDelacourt, Charles. "Apport de la chimie des solutions à la préparation de phosphates de métaux de transition : influence de la structure et de la morphologie sur le comportement électrochimique dans les accumulateurs au lithium." Amiens, 2005. http://www.theses.fr/2005AMIE0517.
Повний текст джерелаDevaux, Éric. "Influence de la présence de renforts et des conditions de mise en œuvre sur la morphologie et les propriétés dans un composite polypropylène-fibres de verre." Lyon 1, 1992. http://www.theses.fr/1992LYO10144.
Повний текст джерелаMenezes, Prashanth W. "New Developments in the Crystal Chemistry of Selected Borophosphates and Phosphates." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2009. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-25105.
Повний текст джерелаForriez, Maxime. "Caractérisation formelle des structures multi-échelles géographiques en relativité d’échelle : exemples en géographie physique, géographie urbaine, géohistoire et géographie du peuplement." Thesis, Avignon, 2010. http://www.theses.fr/2010AVIG1084/document.
Повний текст джерелаThe most obvious characteristic of the terrestrial interface is its heterogeneity. Phenomenologically, this one, human or natural, show limits that define the forms deployed in geographic space. These limits are certainly due to temporal dynamic, all as much as a scale dynamic. This one is manifested in the possible relationships and variables that exist between scales inasmuch as every scale can no conceive than relative to another that is used as reference. This leads to the scale relativity (SR) which should allow to define intrinsically the geographical space. The first objective is to show the possibility of using SR in geography. At the heart of the SR, we found that fractal geometry is indispensable to try to understand the organization in the scales of the world. So far fractals no were used than as a tool of describing more or less relevant. In SR, the fractal forms become a consequence of a formal space intrinsically irregular. The fractality can be thus a way of understanding of the world using the space of scales, that is to say its resolutions. The central objective of this study is thus to build a general fractal methodology necessary under investigation of an unspecified morphology through various examples resulting from the physical geography, the urban geography, the geohistory and the geography of the settlement. The final objective is to lead to solutions formal accessible at a broad community from geographers, which is not the case of the theory of the R.E in its current formalism. From an epistemological point of view, the development in geography of the R.E raises the question of the Re-naturalization of this discipline of the human and social sciences and of the constitution in analytical science, therefore more largely to propose a new definition of the geography
Davit-Béal, Tiphaine. "Odontogenèse chez l'amphibien caudate, Pleurodeles walt : connaissances actuelles, modifications morphologiques dentaires et transition émailloïde-émail au cours de l'ontogenèse, et caractérisation du gène de l'amélogénine." Paris 6, 2006. http://www.theses.fr/2006PA066161.
Повний текст джерелаForriez, Maxime. "Caractérisation formelle des structures multi-échelles géographiques en relativité d'échelle : exemples en géographie physique, géographie urbaine, géohistoire et géographie du peuplement." Phd thesis, Université d'Avignon, 2010. http://tel.archives-ouvertes.fr/tel-00691773.
Повний текст джерелаFamery, Roger. "Etude par diffraction X et microscopie électronique en transmission de transformations de phases dans les systèmes Li2O:Al2O3 ET LI2O-FE2O3 : relations d'orientation, maclage, morphologie, structure." Paris 6, 1986. http://www.theses.fr/1986PA066038.
Повний текст джерелаTrombini, Marion. "Couplage endommagement-grandes déformations dans une modélisation multi-échelle pour composites particulaires fortement chargés." Thesis, Chasseneuil-du-Poitou, Ecole nationale supérieure de mécanique et d'aérotechnique, 2015. http://www.theses.fr/2015ESMA0002/document.
Повний текст джерелаThis study is devoted to multi-scale modeling of highly-filled particulate composites.This method, the “Morphological Approach” (M.A.), is based on a geometrical and kinematicalschematization which allows the access to both local fields and homogenized response. In order toevaluate the predictive capacities of the M.A. considering a linear elastic behavior for the constituentsand evolution of damage, analysis is performed regarding the ability of the M.A. to accountfor particle size and interaction effects on debonding chronology. For that purpose, simple periodic,random monomodal and bimodal microstructures are considered. The results are consistent withliterature data : debonding of large particles occurs before the one of smaller particles and thehigher the particle volume fraction, the sooner the debonding. Finally, the objective is to operatethe coupling of two non linearities which were separately studied in previous versions of the M.A. :debonding between particles and matrix, and finite strains. The whole analytical background of theapproach is reconsidered in order to define the localization-homogenization problem. The nucleationcriterion is extended to the finite strains context. The final problem, strongly non linear, is numericallysolved through a Newton-Raphson algorithm. The different solving steps (jacobian matrix,coding with Python®) are developed. Progressive evaluations (sound and damage materials) allowthe validation of numerical implementation. Then, size and interaction effects are reproduced infinite strains
Claude, Elisabeth. "Synthèse et optimisation des propriétés magnétiques et morphologiques de poudres d'alliages terres rares-métaux de transition par le procédé de réduction-diffusion (ORD), destinées à l'élaboration d'aimants permanents composites à matrice polymère." Grenoble INPG, 1994. http://www.theses.fr/1994INPG0126.
Повний текст джерелаTudella, Joana. "Nouvelles approches pour la résolution de problèmes récurrents en polymérisation des oléfines." Bordeaux 1, 2008. http://www.theses.fr/2008BOR13791.
Повний текст джерелаBrieu, Marc. "Etude par microscopie et diffraction electroniques de petites particules de nickel preparees par reduction en phase liquide." Toulouse 3, 1986. http://www.theses.fr/1986TOU30037.
Повний текст джерелаChevalier, Eric. "Les surfaces à marches des cristaux d'hélium 4." Université Joseph Fourier (Grenoble), 1994. http://www.theses.fr/1994GRE10150.
Повний текст джерелаElqidrea, Ammar. "Effect of irradiation on the monomer-liquid crystal systems." Thesis, Lille 1, 2012. http://www.theses.fr/2012LIL10180/document.
Повний текст джерелаThe motivation of this work is to study the effect of ultraviolet (UV) and electron beam (EB) on the structure and proeprties of polymer composites/liquid crystal prepared by radical polymerization. Research interests in this area have focused on the solution and emulsion polymerization of polymer composites by UV radiation. In this work, we aim to present a deeper understanding of the polymer/LC interactions, with a detailed analysis of the kinetics and mechanism of the polymerization reaction. We studied the changes in the properties of systems based on isotropic and anisotropic polymers by varying both the preparation method and type of monomer. The polymer matrix has been developped with different preparation conditions, leading to optimization the manufacturing process parameters, based on the required properties of the final product. Initially, a literature survey was conducted in the first chapter. Models of radical polymerization are discussed, in addition to the molecular weight distribution of the polymer. The second chapter focusedon describing the preparation of films and polymer matrix composites, with a detailed description of the materials that were used int his study. The third chapter is devoted to the kinetic study of the polymerization reaction of acrylate. The main objective of the fourth chapter is devoted to the analysis of thermophysical polymer composites, and establishing the phase separation. In parallel, we analyze the effects of morphology on the different phase transitions of liquid crystals. The purpose of the fifth chapter is to study the degree of branching and chain transfer reactions depending on the conditions of preparation. The sixth chapter focused on the analysis of the molecular weight distribution of polymer chains using gel permeation chromatography
Servet, Bernard. "Etude et modelisation des mecanismes d'orientation moleculaire et dipolaire dans le poly(fluorure de vinylidene)." Paris 7, 1987. http://www.theses.fr/1987PA077157.
Повний текст джерелаEl, Haj Kacem Maher. "Visco-plasticité de transformation de phase diffusive : modélisation numérique et caractérisation des effets de la viscosité." Thesis, Rouen, INSA, 2016. http://www.theses.fr/2016ISAM0007.
Повний текст джерелаIn this study, the mechanical consequences of phase transformations in steel, particularly, the TRansformation Induced Plasticity TRIP as well as the elasto-viscoplastic behavior has been analyzed. This transformation plasticity, due to the Greenwood-Johnson mechanism, is often described with the model of Leblond with the assumption of an elastoplastic behavior. Moreover, in the majority of experimental analysis or numerical finite elements modeling FEM or phase field modeling PFM, the viscous criteria were not considered. However, several recent studies have demonstrated that both phases (parent and product) show high strain-rate sensitivity at elevated temperatures. Hence, the principal interests using the FEM modeling to extend these main reference models of [Leblond, 89] and [Taleb-Sidoroff, 2003], with taking into account the viscous effects, which are present during some phase transformations, especially at high temperatures. To do this, the behavior of each phase is described by an elasto-viscoplastic law with mixed hardening associated to the Norton law. The transformation kinetics is imposed and the problem of mechanical interactions between phases is processed by the finite element method. On the one hand, the contribution from viscosity to TRIP was quantified for different strain-rate during phase transformation. On the other hand, the effect of an arbitrarily-set of transformation-rate in the FEM simulations was evaluated and characterized. An extension of the existing models (for periodic and random kinetics) is proposed. It consists at first in studying and in evaluating the effect of both the morphology of nuclei and the growth anisotropy, on the prediction of TRIP. Then, an improvement with non-isothermal model, based on existing experimental measures, was introduced. It consists mainly in taking into account the variation of the mechanical properties of the mixture of both phases, according to the temperature. The predictions show that in such cases, the consideration of the viscosity can lead to major changes of the estimated TRIP compared with results obtained from a classic plastic model. Also, the prediction of TRIP can be significantly influenced by the choice of the morphology of germs and by the type of growth: isotropic or anisotropic. These improvements, particularly with the non-isothermal configuration, show a good agreement with experimental measures of TRIP on the 10006 steel during pearlite phase transformation [Tahimi, 2012]. This study allows besides, releasing obvious trends in the relations between the TRIP and the history of the phase transformation: mechanical loading and kinetics of transformation, morphology of nuclei and growth anisotropy. These results can contribute to the elaboration of a simple analytical model taking into account the viscous criteria
M'Nasri, Najib. "Elaboration de nanomatériaux composites métal@nanoparticules de silice mésoporeuses (MSN) : étude des performances catalytiques en phase aqueuse et des propriétés d'adsorption sélective du diiode en phase gaz." Thesis, Montpellier 2, 2014. http://www.theses.fr/2014MON20199.
Повний текст джерелаThe objective of this thesis was to develop efficient synthesis routes to prepare mesoporous silica-based nano-sized particles, designated as MSN, with controllable morphology and derivatised with selected transition metals. One-pot preparation and surface functionalisation procedures based on the insertion of the metal-phase precursor into the porogen aggregates were thoroughly optimised leading to silica particles containing such single metals as copper, palladium, platinum, silver or gold, as well as a two-metal phase of copper and palladium or that of palladium and platinum. It was demonstrated that the highly dispersed metal phase was localised on the pore surface and therefore it was readily accessible to the target chemicals on which to base the catalytic performance of the resulting materials. Among others, the remarkable catalytic performance of the Cu@MSN material in Huisgen and Sonogashira reactions and its propensity to undergo efficient recycling were proven through laboratory-scale testing. Experimental study of the selective adsorption of iodine vapour onto MSN supports functionalised with silver nanoparticles indicated an excellent retention capacity of such materials
GADENNE, PETIT MIREILLE. "Proprietes de transport de couches minces d'or granulaire : absorption infra-rouge, effets dimensionnels." Paris 6, 1987. http://www.theses.fr/1987PA066385.
Повний текст джерелаHagh-Gou, Djafar. "Étude de l'émission d'ions négatifs secondaires par pulvérisation ionique d'alliages binaires." Nancy 1, 1988. http://www.theses.fr/1988NAN10370.
Повний текст джерелаTioual-Demange, Sarah. "Modélisation d’évolutions microstructurales dans les alliages de titane." Electronic Thesis or Diss., Université de Lorraine, 2019. http://www.theses.fr/2019LORR0293.
Повний текст джерелаThe present study is mainly about the calculation of β → α + β transformation kinetics and the prediction of resulting microstructures in three industrial titanium alloys Ti17, Ti6242 and Ti6246 and a ternary alloy TiMoO during isothermal heat treatments, by pursuing the development of TITAN model, developed by Di Napoli (2010). A study of the sensitivity of the model to several input parameters is first presented, distinguishing two temperature domains: the domain of morphologies at the grain boundaries αgb + αwgb , and the domain of the intragranular morphology αwi. Among these parameters: the critical thickness of appearance of awgb morphology and the spacing between the lamellae, in order to determine a dataset for the different alloys and temperatures studied; the σββ grain boundary energies, which have a significant influence on the nucleation and growth of the three α phase morphologies; the aspect ratio of the αwi spheroids, which varies according to the isothermal holding temperature; the thermodynamic parameters and diffusivities of the alloying elements, which control the thermodynamic equilibrium, and whose study allowed to highlight complex evolutions. The influence of the isothermal holding temperature and the alloy composition on phase transformation kinetics has also been addressed. These studies allowed to establish a calculated TTT of Ti17 alloy, in agreement with the experimental results
Winey, Karen Irene. "Morphologies and morphological transitions in binary blends of diblock copolymer and homopolymer." 1991. https://scholarworks.umass.edu/dissertations/AAI9132934.
Повний текст джерелаMarenz, Martin. "Morphologies of Semiflexible Polymers in Bulk and Spherical Confinement." 2017. https://ul.qucosa.de/id/qucosa%3A23448.
Повний текст джерелаMaillard, Damien. "Cristallisation des polylactides en films minces et ultraminces." Thèse, 2008. http://hdl.handle.net/1866/6552.
Повний текст джерела