Electrodeposition of copper in the presence of an acoustically excited gas bubble
Electrodeposition of copper in the presence of an acoustically excited gas bubble
Copper has been electrodeposited in the presence of an acoustically excited gas bubble (Ar bubbles with radii 1.5 mm held below a copper plate). Under the conditions employed, an acoustic pressure amplitude of 69.5 Pa is sufficient to excite multiple surface wave modes on the bubble wall. This is observed using high-speed imaging. This oscillation generates significant micromixing, which brings fresh electrolyte to the electrode surface leading to an enhanced deposition current. Scanning electron microscopy reveals radial streaming patterns in the resulting copper deposit. Experiments carried out using a lower acoustic pressure amplitude of 50.5 Pa (such that only the Faraday wave is excited) exhibit a lesser degree of streaming and mass transfer enhancement. No significant spatially averaged current enhancement is seen if the bubble is only undergoing breathing mode oscillation.
waves, current enhancement, rotating-disk electrode, sonoelectrochemistry, electrodeposition, cavitation, macromorphology, microelectrode, surface, ultrasound, faraday wave, bubble, flow visualization, electrochemical detection, acoustic excitement
1062-1068
Offin, Douglas G.
e7cbc36d-c3ae-431b-9f7a-8c38ccb53579
Birkin, Peter R.
ba466560-f27c-418d-89fc-67ea4f81d0a7
Leighton, Timothy G.
3e5262ce-1d7d-42eb-b013-fcc5c286bbae
May 2007
Offin, Douglas G.
e7cbc36d-c3ae-431b-9f7a-8c38ccb53579
Birkin, Peter R.
ba466560-f27c-418d-89fc-67ea4f81d0a7
Leighton, Timothy G.
3e5262ce-1d7d-42eb-b013-fcc5c286bbae
Offin, Douglas G., Birkin, Peter R. and Leighton, Timothy G.
(2007)
Electrodeposition of copper in the presence of an acoustically excited gas bubble.
Electrochemistry Communications, 9 (5), .
(doi:10.1016/j.elecom.2006.12.025).
Abstract
Copper has been electrodeposited in the presence of an acoustically excited gas bubble (Ar bubbles with radii 1.5 mm held below a copper plate). Under the conditions employed, an acoustic pressure amplitude of 69.5 Pa is sufficient to excite multiple surface wave modes on the bubble wall. This is observed using high-speed imaging. This oscillation generates significant micromixing, which brings fresh electrolyte to the electrode surface leading to an enhanced deposition current. Scanning electron microscopy reveals radial streaming patterns in the resulting copper deposit. Experiments carried out using a lower acoustic pressure amplitude of 50.5 Pa (such that only the Faraday wave is excited) exhibit a lesser degree of streaming and mass transfer enhancement. No significant spatially averaged current enhancement is seen if the bubble is only undergoing breathing mode oscillation.
Text
EC_Copper_for_eprints.pdf
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More information
Published date: May 2007
Keywords:
waves, current enhancement, rotating-disk electrode, sonoelectrochemistry, electrodeposition, cavitation, macromorphology, microelectrode, surface, ultrasound, faraday wave, bubble, flow visualization, electrochemical detection, acoustic excitement
Identifiers
Local EPrints ID: 54352
URI: http://eprints.soton.ac.uk/id/eprint/54352
ISSN: 1388-2481
PURE UUID: cccb6b69-dd2f-4afa-9c29-60d31365f27c
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Date deposited: 31 Jul 2008
Last modified: 16 Mar 2024 02:46
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Author:
Douglas G. Offin
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