AC-driven interfacial electrodeposition of silver

Leila Zeiri, Shlomo Efrima, Moshe Deutsch

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

Two-dimensional interfacial electrodeposition of silver is studied under alternating square-wave electric potential conditions, at the water/dichloromethane interface. The overall rate of growth is found to increase with frequency. The deposit's morphology also depends strongly on the frequency: at ≤ 10 Hz compact deposits are formed while at 1-10 kHz highly ramified structures develop, the branches in which tend to broaden out at higher frequencies. At∼100 Hz a highly disordered growth is observed. A novel pulsating behavior of the deposit size is observed, with alternating contractions and growth phases. The contractions are attributed to a mechanical compaction of the newly-formed deposit, driven by the fast changes in surface tension due to the voltage variation. The mechanical oscillations induce hydrodynamic stirring in the solution, affecting the mass-transport of the reacting silver ions to the electrode, and, consequently, the rate of growth and morphology of the deposit.

Original languageEnglish
Pages (from-to)4722-4728
Number of pages7
JournalLangmuir
Volume13
Issue number17
DOIs
StatePublished - 20 Aug 1997

ASJC Scopus subject areas

  • Materials Science (all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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