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<dc:title xml:lang="en">Capteurs piézorésistifs flexibles portables à base de graphène : des mécanismes fondamentaux aux systèmes intégrés de surveillance de la santé</dc:title>
<dcterms:alternative xml:lang="fr">Wearable graphene-based Flexible piezoresistive sensors : from fundamental mechanisms to Integrated health monitoring systems</dcterms:alternative>
<dc:subject xml:lang="fr">Capteurs piézorésistifs flexibles</dc:subject>
<dc:subject xml:lang="fr">Oxyde de graphène fonctionnalisé</dc:subject>
<dc:subject xml:lang="fr">Architectures bilouches à conductivité contrôlée</dc:subject>
<dc:subject xml:lang="fr">Compensation thermique intrinsèque</dc:subject>
<dc:subject xml:lang="fr">Système de surveillance de la santé</dc:subject>
<dc:subject xml:lang="en">Flexible piezoresistive sensors</dc:subject>
<dc:subject xml:lang="en">Functionalized graphene oxide</dc:subject>
<dc:subject xml:lang="en">Conductivity-engineered bilayer architectures</dc:subject>
<dc:subject xml:lang="en">Intrinsic temperature compensation</dc:subject>
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<dcterms:abstract xml:lang="fr">Cette thèse présente la conception, la fabrication et l'application de capteurs de pression piézorésistifs flexibles de nouvelle génération, basés sur des matériaux à base d'oxyde de graphène (GO) fonctionnalisé. En introduisant des architectures bil couches à conductivité optimisée, cette recherche surmonte le compromis historique entre haute sensibilité et large plage de détection linéaire. Deux systèmes de capteurs innovants ont été développés : l’un repose sur une couche composite conductrice non linéaire pour une sensibilité dépendante de la tension et une compensation thermique intrinsèque ; l’autre utilise des films de GO réduit poreux sur des substrats respirants, améliorant ainsi le confort au port et les performances de détection. Ensemble, ces stratégies posent les bases solides de capteurs multifonctionnels et évolutifs, adaptés à la surveillance de la santé portable, à la robotique et aux plateformes intelligentes de reconnaissance de la démarche.</dcterms:abstract>
<dcterms:abstract xml:lang="en">This thesis presents the design, fabrication, and application of next-generation flexible piezoresistive pressure sensors based on functionalized graphene oxide (GO) materials. By introducing conductivity engineered bilayer architectures, the research overcomes the longstanding trade-off between high sensitivity and broad linear sensing range. Two innovative sensor systems are developed: one leveraging nonlinear conductive composite layer for bias-dependent sensitivity and intrinsic temperature compensation, and another utilizing porous reduced GO films on breathable substrates for enhanced comfort and performance. Together, these strategies lay a robust foundation for scalable, multifunctional sensors in wearable health monitoring, robotics, and intelligent gait recognition platforms.</dcterms:abstract>
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