Potential-induced switching of electrical contact by controlling droplet shapes at hydrophilic/hydrophobic interfaces

Xuemei Wang, Eugenii Katz, Itamar Willner*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

Asymmetrical deformation of an aqueous electrolyte droplet bridging two bipyridinium-modified Au-electrodes is achieved upon the application of voltages resulting in the selective reduction and oxidation of the bipyridinium units on the two electrodes. The different contact angles at the right and left sides of the droplet originate from the electrochemically controlled changes of the wetting properties of the modified electrodes. The reversible and repeatable formation of an electrolytic contact between a side Pt-wire electrode and the respective bottom Au-electrode is controlled by the voltage applied between the two bottom Au-electrodes.

Original languageEnglish
Pages (from-to)814-818
Number of pages5
JournalElectrochemistry Communications
Volume5
Issue number9
DOIs
StatePublished - 1 Sep 2003

Keywords

  • Bipyridinium electrochemistry
  • Contact angle
  • Electrochemical switch
  • Modified electrode
  • Monolayer

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