Deciphering the Elementary Steps of Transport-Reaction Processes at Individual Ag Nanoparticles by 3D Superlocalization Microscopy
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- 作者：Anisha N. Patel ; Ariadna Martinez-Marrades ; Vitor Brasiliense ; Dmitry Koshelev ; Mondher Besbes ; Robert Kuszelewicz ; Catherine Combellas ; Gilles Tessier ; Fr茅d茅ric Kanoufi
- 刊名：Nano Letters
- 出版年：2015
- 出版时间：October 14, 2015
- 年：2015
- 卷：15
- 期：10
- 页码：6454-6463
- 全文大小：493K
- ISSN：1530-6992
文摘
Transport-reaction processes at individual Ag nanoparticles (NPs) are studied using electrochemistry coupled with in situ 3D light scattering microscopy. Electrochemistry is used to trigger a (i) diffusiophoretic transport mode capable of accelerating and preconcentrating NPs toward an electrode and (ii) subsequent diffusion-controlled oxidation of NPs. Individual NP dissolution rate, analyzed using optical modeling, suggests the intervention of insoluble products. New insights into diverse NPs behaviors highlight the strength of coupled optical-electrochemical 3D microscopies for single-NP studies.