Exploration des nanotechnologies ADN pour l'auto-assemblage de nanoparticules d'aluminium et d'oxyde de cuivre : application à la synthèse de matériaux énergétiques

Théo Calais 1
1 LAAS-NEO - Équipe Nano-ingénierie et intégration des oxydes métalliques et de leurs interfaces
LAAS - Laboratoire d'analyse et d'architecture des systèmes [Toulouse]
Abstract : Over the two last decades, DNA technologies have intensively been studied for the organization of matter at the nanoscale. Thanks to the bio recognition of two complementary DNA single-strands and their hybridization into the famous helicoidally structure, self-assembling of gold nanoparticles into highly ordered micrometer scale crystals has been demonstrated. The aim of this thesis is to explore this new nanotechnology for the self-assembly of Al and CuO nanoparticles driven by DNA hybridization into highly energetic nanocomposites by optimizing contact surfaces between reducer (Al) and oxidizer (CuO). We chose Streptavidin-biotin strategy to functionalize nanoparticles with DNA single strands. More precisely, the functionalization process includes four steps: (i) stabilization of Al and CuO nanoparticles into separate colloidal suspensions; (ii) Streptavidin grafting on Al and CuO nanoparticles; (iii) DNA grafting on Al and CuO Streptavidin-modified nanoparticles thanks to the addition of biotin function at the end of the DNA single strands; (iv) mixing of the two colloidal DNA-functionalized suspensions in order to realize the self-assembly. First, we precisely determined, characterized and optimized each step of the functionalization process. Then, we studied more precisely two key points of the process: we analyzed the interaction of DNA bases with technologically relevant oxide surfaces by studying the grafting of Thymidine by theoretical and experimental approaches; and we studied the influence of the coding sequence used for the DNA strands on the quality of the self-assembly, also by theoretical and experimental analyses. Finally, we optimized environmental conditions to realize the self-assembly of DNA-functionalized nanoparticles into energetic nanobiocomposites. Morphologies and energetic properties were established as a function of synthesis conditions, and the control of energetic performances of nanobiocomposites as a function of aggregation process was demonstrated.
Document type :
Theses
Micro et nanotechnologies/Microélectronique. Institut National Polytechnique de Toulouse, 2017. Français
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Submitted on : Friday, March 3, 2017 - 2:47:05 PM
Last modification on : Thursday, January 11, 2018 - 2:09:18 AM
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  • HAL Id : tel-01482306, version 1

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Théo Calais. Exploration des nanotechnologies ADN pour l'auto-assemblage de nanoparticules d'aluminium et d'oxyde de cuivre : application à la synthèse de matériaux énergétiques. Micro et nanotechnologies/Microélectronique. Institut National Polytechnique de Toulouse, 2017. Français. 〈tel-01482306〉

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