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Acoustic bubbles microstreaming-induced fragmentation of ramified iron electrodeposits in a microchannel

Iranzo, Audrey and Tzedakis, Théodore and Chauvet, Fabien Acoustic bubbles microstreaming-induced fragmentation of ramified iron electrodeposits in a microchannel. (2016) In: µTAS 2016 - The 20th International Conference on Miniaturized Systems for Chemistry and Life Sciences, 9 October 2016 - 13 October 2016 (Dublin, Ireland). (Unpublished)

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Official URL: http://www.eurekanetwork.org/sites/default/files/MicroTAS2016_PreliminaryProgram.pdf

Abstract

We report on the use of a high aspect ratio microchannel (Hele-Shaw’s cell) in which ramified iron deposits are electrochemically formed and next subjected to acoustic vibrations in order to fragment them into fine particles. Both the electrodes and a piezoelectric element are integrated in the microchannel. High speed visualization allows to highlight the key role of the co-produced H2 bubbles (during the electrodeposition step) which generate microstreaming when subjected to vibrations. The resulting flow pattern sets in motion the ramified iron branches and bring them to bubbles surfaces where they are fragmented into submicrometric particles of iron.

Item Type:Conference or Workshop Item (Poster)
Audience (conference):International conference proceedings
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
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Deposited By: Fabien CHAUVET
Deposited On:16 Feb 2017 10:47

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