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Opto-Electrochemical Methods for Imaging the Reactivity of Individual Nanoparticles

Abstract : A number of coupled optical and electrochemical single particle techniques are employed for investigating a variety of chemical systems at the level of individual objects.On the optical side, holography and visible spectroscopy are imbued with superlocalization principles pushing the applicability of these techniques down to sub-diffraction levels. Nanoelectrochemical techniques such as stochastic impacts and nanoelectrodes are used to complement this information, providing a much more complete characterization of the phenomena.It is shown that this dual optical and electrochemical single particle characterizationis actually crucial to understand complex nano chemical systems in loco. Starting frommodel reactions, such as Ag oxidation, the complexity of the studied phenomena and systems is progressively increased, as light is shed on transport phenomena, aggregation,as well as redox transformations and catalysis on complicated materials such as ill-defined transition metal (cobalt) oxides
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Submitted on : Friday, August 30, 2019 - 10:33:18 AM
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Vitor Brasiliense. Opto-Electrochemical Methods for Imaging the Reactivity of Individual Nanoparticles. Other. Université Sorbonne Paris Cité, 2017. English. ⟨NNT : 2017USPCC283⟩. ⟨tel-02274693⟩



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