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Ultrasonic-induced morphological change of micro/nanodeposits and current change in electrochemical migration

Published online by Cambridge University Press:  27 September 2019

Yusuke Endo ,
Yasuhiro Kimura Open the ORCID record for Yasuhiro Kimura [Opens in a new window]  and
Masumi Saka
Yusuke Endo
Affiliation:
Department of Finemechanics, Graduate School of Engineering, Tohoku University, Aoba 6-6-01, Aramaki, Aoba-ku, Sendai980-8579, Japan
Yasuhiro Kimura*
Affiliation:
Department of Finemechanics, Graduate School of Engineering, Tohoku University, Aoba 6-6-01, Aramaki, Aoba-ku, Sendai980-8579, Japan
Masumi Saka
Affiliation:
Department of Finemechanics, Graduate School of Engineering, Tohoku University, Aoba 6-6-01, Aramaki, Aoba-ku, Sendai980-8579, Japan
*
Address all correspondence to Yasuhiro Kimura at kimura@ism.mech.tohoku.ac.jp
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Abstract

To examine the influence of ultrasonic irradiation on electrochemical migration (ECM), the morphology of micro/nanodeposits and current change were studied. The morphology of deposits synthesized by ECM varied with the types of ultrasonic irradiation: continuous or pulsed irradiation generates only particles or deposits composed of wires, dendrites, and particles. The measured ECM current change over time concludes that both mechanical and sonochemical effects contributed to the morphological change of deposits. Shock waves by cavitation mechanically formed the fragmented deposits and the sonochemical effect decreases the ionic concentration corresponding to decreasing current, inhibiting the formation of wires and dendritic deposits.

Type
Research Letters
Information
MRS Communications , Volume 9 , Issue 4 , December 2019 , pp. 1331 - 1334
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Copyright
Copyright © Materials Research Society 2019

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