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Elaboration de verres sodocalciques dopés avec des nanoparticules métalliques et semi-conductrices

Abstract : The aim of this thesis is to dope soda-lime glasses with either silver, gold or cobalt nanoparticles. The experimental procedure is based on the successive combination of thermal ion exchange techniques (conventional or assisted by electric field) and continuous UV laser irradiation (244 nm).The first part of this work concerns the effect of oxygen on the growth of silver nanoparticles. We have demonstrated a reducing effect of oxygen on silver ions which favors the growth of silver nanoparticles during the laser exposure.The second part of this work is dedicated to the doping of the glass with gold nanoparticles. We have shown that the formation of gold nanoparticles strongly depends on the temperature applied during the ion exchange. After optimization of the experimental parameters, we have been able to show the efficiency of our substrates for the detection of very low concentrated molecules diluted in liquid solution, using the well-known SERS technique.The last part of this work deals with the results obtained with cobalt. We have demonstrated the formation of either Co3O4 or CoO nanoparticles located at the glass surface. Raman study has shown the possibility to favor etiher one of these two phases. The feasibility of co-doping the glass by silver and cobalt has also been demonstrated and we have highlighted the preferential oxidation of cobalt with respect to silver, opening new perspectives such as the optimization of SERS sensors or for potential magneto-optical applications.
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Submitted on : Wednesday, July 8, 2020 - 3:43:57 PM
Last modification on : Monday, August 3, 2020 - 8:52:26 AM


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  • HAL Id : tel-02893851, version 1


Rim Faraj. Elaboration de verres sodocalciques dopés avec des nanoparticules métalliques et semi-conductrices. Matériaux. Université de Lyon, 2019. Français. ⟨NNT : 2019LYSES041⟩. ⟨tel-02893851⟩



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