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<dc:title xml:lang="en">2D materials : exfoliation in liquid-phase and electronics applications</dc:title>
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<dc:subject xml:lang="fr">Matériaux bidimensionnels</dc:subject>
<dc:subject xml:lang="fr">Exfoliation en milieu liquide</dc:subject>
<dc:subject xml:lang="fr">Exfoliation électrochimiques</dc:subject>
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<dc:subject xml:lang="en">Liquid-phase exfoliation</dc:subject>
<dc:subject xml:lang="en">Electrochemical exfoliation</dc:subject>
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<dc:subject xml:lang="en">Thin films</dc:subject>
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<tef:elementdEntree autoriteExterne="125142455" autoriteSource="Sudoc">Graphène</tef:elementdEntree>
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<dcterms:abstract xml:lang="fr">Cette thèse est consacrée à la production de matériaux 2D en phase liquide, en utilisant des approches pouvant permettre la production en masse de graphène et de matériaux apparentés. Notre objectif est de surmonter certains problèmes critiques pour le traitement et l'utilisation pratique des encres à base de matériaux 2D et de fournir une compréhension approfondie de la relation structure-propriétés dans ces matériaux, constituant des étapes obligatoires pour leurs applications futures. Cette thèse porte principalement sur l'UILPE et l'exfoliation électrochimique du graphène et du disulfure de molybdène (MoS2), qui ont été choisis comme matériaux prototypes à 2 dimensions. Les approches synthétiques sont combinées à une caractérisation physico-chimique des matériaux produits, à l'aide de techniques telles que l'AFM, la microscopie électronique, la spectroscopie XPS et Raman, ainsi qu'à une caractérisation électrique. Des applications dans le domaine de la détection et de l'électronique ont été explorées et ont permis de démontrer que des approches d'exfoliation en phase liquide pouvaient être utilisées pour obtenir un contrôle précis des propriétés des matériaux 2D ouvrant la voie à leur intégration en tant que matériaux actifs dans de nouveaux dispositifs multifonctionnels.</dcterms:abstract>
<dcterms:abstract xml:lang="en">This thesis is devoted to the production in liquid-phase of two-dimensional materials, by using approaches that may enable mass production of graphene and related materials. We aim to overcome some issues that are critical for the processing and practical use of 2D materials-inks and to provide a deep understanding of the structure-properties relationship in such materials being mandatory steps toward their future applications. This thesis mainly focuses on ultrasound-induced liquid-phase exfoliation and electrochemical exfoliation of graphene and molybdenum disulfide, which have been chosen as prototypical 2D materials. The synthetic approaches have been combined with a multiscale physico-chemical and electrical characterization of the produced materials, by employing techniques such as AFM, XPS and Raman spectroscopy. Applications in the field of sensing and electronics have been explored and allowed to demonstrate that liquid-phase exfoliation approaches can be conveniently employed to achieve a fine control on the properties of 2D materials paving the way to their integration as active materials in novel multifunctional devices.</dcterms:abstract>
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