Combining Electrodeposition and Optical Microscopy for Probing Size‐Dependent Single‐Nanoparticle Electrochemistry |
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Authors: | Dr Jean‐François Lemineur Dr Jean‐Marc Noël Dr Dominique Ausserré Dr Catherine Combellas Dr Frédéric Kanoufi |
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Institution: | 1. Université Sorbonne Paris Cité, Université Paris Diderot, ITODYS, CNRS UMR 7086, Paris, France;2. Maine University, Institut des Matériaux et Molécules du Mans, CNRS UMR, Le Mans, France |
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Abstract: | Electrodeposition of nanoparticles (NPs) is a promising route for the preparation of highly electroactive nanostructured electrodes. By taking advantage of progressive electrodeposition, disordered arrays with a wide size distribution of Ag NPs are produced. Combined with surface‐reaction monitoring by using highly sensitive backside absorbing‐layer optical microscopy (BALM), such arrays offer a platform for screening size‐dependent electrochemistry at the single NP level. In particular, this strategy allows rationalizing the electrodeposition dynamics at the single‐NP level (>10 nm), up to the point of quantifying the presence of metal nanoclusters (<2 nm), and probing easier NP oxidation with size decrease, either through electrochemical or galvanic reactions. |
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Keywords: | electrodeposition optical microscopy single-nanoparticle electrochemistry size effects |
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