On the observation of inductive high-frequency impedance behaviour during the electrodeposition of Au—Sn alloys |
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Authors: | Benedetto Bozzini Claudio Mele Ivonne Sgura |
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Affiliation: | (1) Dipartimento di Ingegneria dell'Innovazione, Università di Lecce, v. Monteroni, I-73100 Lecce, Italy;(2) Dipartimento di Matematica, Università di Lecce, v. Monteroni, I-73100 Lecce, Italy |
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Abstract: | Inductive high-frequency impedance behaviour is often observed in metal electrodeposition systems. This behaviour is typically attributed to equipment limitations or non-idealities in the cell set-up and electrical connections. Such instrumental artefacts would nevertheless be relevant to a frequency range which is expected to be well above that in which inductive behaviour is in fact observed (down to a few tens of Hz). In this paper some results on an acidic Au—Sn electrodeposition system are reported. Electrochemical impedance and potentiostatic transients were measured. These results suggest that the high-frequency inductive behaviour may be related to metal nucleation processes. A correlation is proposed between the pseudo-inductive potentiostatic nucleation transients and the pseudo-inductive behaviour of the impedance spectra. |
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Keywords: | Au alloys Au— Sn electrochemical impedance electrocrystallisation electrodeposition of alloys nucleation |
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