Electric field effects on air/solution interfaces

Research output: Contribution to journalArticle

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Abstract

Experiments to measure the effect of applied electric fields on the surface tension of aqueous solutions are difficult and have so far proved inconclusive. The effect of fields on both the surface pressure and surface excess of adsorbed solutes can be calculated from the simpler measurements of surface potential, using Maxwell relations from a thermodynamic analysis of the Volta effect. Examples for the air/water interface of NaCl and sodium dodecyl sulfate solutions are given. The results are compared with data for insoluble spread monolayers and contrasted with electrocapillarity. The effect of electric fields on the surface tension of water itself remains obscure.

Original languageEnglish (US)
Pages (from-to)3115-3117
Number of pages3
JournalLangmuir
Volume14
Issue number11
DOIs
StatePublished - May 26 1998
Externally publishedYes

All Science Journal Classification (ASJC) codes

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

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