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<dc:title xml:lang="en">Polymer films and brushes self-construction by electrochemically triggered morphogens</dc:title>
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<dc:subject xml:lang="fr">Auto-assemblage</dc:subject>
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<dc:subject xml:lang="fr">Polyéléctrolytes</dc:subject>
<dc:subject xml:lang="fr">Enzymes</dc:subject>
<dc:subject xml:lang="fr">Biomatériaux</dc:subject>
<dc:subject xml:lang="fr">Électrochimie</dc:subject>
<dc:subject xml:lang="fr">Morphogène</dc:subject>
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<dc:subject xml:lang="fr">Microbalance à cristal de quartz</dc:subject>
<dc:subject xml:lang="en">Self-assembly</dc:subject>
<dc:subject xml:lang="en">Interface</dc:subject>
<dc:subject xml:lang="en">Polyelectrolytes</dc:subject>
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<dc:subject xml:lang="en">Morphogen</dc:subject>
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<tef:elementdEntree autoriteExterne="069752575" autoriteSource="Sudoc">Autoassemblage</tef:elementdEntree>
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<dcterms:abstract xml:lang="fr">Les multicouches de polyelectrolytes, systèmes auto-assemblés par adsorption successive de polycations et de polyanions, constituent un matériau d’intérêt pour la fonctionnalisation de surface. Ce type de revêtement possède toutefois quelques limitations majeures : leur construction est lente et fastidieuse ; leur tenue mécanique et chimique est faible. Récemment, une méthode basée sur l’auto-construction de films par l’utilisation d’un morphogène, i.e. un gradient de catalyseur généré depuis une surface, a été développé permettant ainsi une rapide construction de revêtements robustes. Cette technique reste toutefois limitée à des systèmes particuliers basés sur la chimie click ou sur des interactions hôtes-invités. Nos travaux ont permis de diversifier cette approche de construction tout-en-un par l’utilisation de morphogènes. Dans un premier temps, des brosses de polymères ont été construites en une étape depuis une surface par la réaction de polymérisation ATRP. Cette réaction a été catalysée par la formation d’ions Cu(I) (le morphogène) par électrochimie depuis la surface de travail. L’approche morphogénique a également été utilisée afin de construire des films de polyélectrolytes et de polyampholytes en une étape par la génération électrochimique d’un gradient de protons (le morphogène) depuis la surface de travail. Ces films ont été fonctionnalisés pour présenter une activité enzymatique.</dcterms:abstract>
<dcterms:abstract xml:lang="en">Polyelectrolyte multilayers, i.e. self-assembled systems based on successive polycation and polyanion adsorptions, constitute interesting materials for surface functionalization. These coatings possess several limitations: they are weak towards chemical and mechanical constraint and their buildup is long and tedious. Recently, a new method based on the self-construction of films by the means of a morphogen (a catalyst gradient generated from a surface) has attracted attention since it allows the quick self-assembly of robust films. Nevertheless, this technique was quite limited to peculiar systems based on click chemistry or on host-guest interactions.This present work generalize the one-pot morphogenic approach to other systems. In the first place, polymer brushes were built up from a surface by ATRP polymerization. The Cu(I) catalyst (the morphogen) was electrochemically generated at the interface.The morphogenic approach was later used to buildup polyelectrolytes and polyampholyte films in a one-pot manner by electrochemically generating protons (the morphogens) at the interface. These films exhibited an enzymatic activity.</dcterms:abstract>
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