Direct measurement of ion accumulation at the electrode electrolyte interface under an oscillatory electric field

Gaurav Singh, Ravi F Saraf

Research output: Contribution to journalArticle

9 Scopus citations


The ionic charge accumulation at the metal-electrolyte interface is directly measured by using differential interferometry as a function of magnitude and frequency (2-50 kHz) of external electric field. The technique developed probes the ion dynamics confined to the electrical double layer. The amplitude of modulation of the ions is linearly proportional to the amplitude of applied potential. The linearity is observed up to high electrode potentials and salt concentrations. The frequency response of the ion dynamics at the interface is interpreted in terms of the classical RC model.

Original languageEnglish (US)
Pages (from-to)12581-12587
Number of pages7
JournalJournal of Physical Chemistry B
Issue number25
StatePublished - Jun 29 2006


ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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