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<dc:title xml:lang="en">Controlled chemical functionalization of graphene oxide</dc:title>
<dcterms:alternative xml:lang="fr">Fonctionnalisation chimique contrôlée de l’oxyde de graphène</dcterms:alternative>
<dc:subject xml:lang="fr">Oxyde de graphène</dc:subject>
<dc:subject xml:lang="fr">Composition de surface</dc:subject>
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<dc:subject xml:lang="fr">Multi-fonctionnalisation</dc:subject>
<dc:subject xml:lang="fr">Biodistribution</dc:subject>
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<dc:subject xml:lang="fr">Caractérisation</dc:subject>
<dc:subject xml:lang="en">Graphene oxide</dc:subject>
<dc:subject xml:lang="en">Surface composition</dc:subject>
<dc:subject xml:lang="en">Functionalization</dc:subject>
<dc:subject xml:lang="en">Multifunctionalization</dc:subject>
<dc:subject xml:lang="en">Biodistribution</dc:subject>
<dc:subject xml:lang="en">Dispersibility</dc:subject>
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<tef:elementdEntree autoriteExterne="127912002" autoriteSource="Sudoc">Fonctionnalisation des surfaces (chimie)</tef:elementdEntree>
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<tef:elementdEntree autoriteExterne="196311527" autoriteSource="Sudoc">Réactivité de surface</tef:elementdEntree>
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<tef:elementdEntree autoriteExterne="031778526" autoriteSource="Sudoc">Nanoparticules</tef:elementdEntree>
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<dcterms:abstract xml:lang="fr">L’oxyde de graphène est un nanomatériau prometteur grâce à ses caractéristiques physicochimiques. Cependant, jusqu’à aujourd’hui, sa composition exacte reste encore inconnue. Ceci est dû à la complexité et au caractère non-stoechiométrique de ce matériau. Nous avons commencé par étudier sa composition de surface et sa réactivité. Nous avons utilisé des échantillons synthétisés de manière différente pour explorer la relation entre la méthode de synthèse et la composition de surface. En outre, nous avons préparé un dérivé fonctionnalisé avec un agent chélatant de radionucléides pour étudier sa biodistribution et l’impact de la taille latérale.Par la suite, nous avons essayé plusieurs stratégies de multi-fonctionnalisation. L’avantage est de pouvoir combiner différentes propriétés. Nous avons observé que, souvent après la fonctionnalisation, la dispersabilité de l’oxyde de graphène diminue. Ainsi, nous avons développé un échantillon fonctionnalisé par un polymère soluble dans l’eau. Enfin, nous avons exploré et amélioré les méthodes de caractérisation de l’oxyde de graphène. Une caractérisation approfondie par différentes techniques est fondamentale pour comprendre les modifications que le matériau a subies.</dcterms:abstract>
<dcterms:abstract xml:lang="en">Graphene oxide is a promising nanomaterial thanks to its physicochemical characteristics. However, until today its exact composition remains still unknown. This is due to the complexity and non-stoichiometric character of this material.We started by investigating the surface composition of graphene oxide and its reactivity. We used differently synthesized samples to explore the relationship between the synthesis method and the surface composition. Furthermore, we functionalized graphene oxide with a chelating agent of radionuclides to study its biodistribution, and the impact of the lateral size. Afterwards, we tried different strategies for multifunctionalization with the aim to combine different properties. We observed that the dispersibility of graphene oxide often decreased after functionalization. Thus, we developed a highly water-stable graphene oxide sample by grafting awater-soluble polymer on its surface. Finally, we explored and improved the characterization methods for graphene oxide. Athorough investigation using different characterization techniques is fundamental to understand the modifications that the material underwent.</dcterms:abstract>
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