ζ potential measurement by means of the plane interface technique

Hiroshi Sasaki, Atsushi Muramatsu, Hiroshi Arakatsu, Shinnosuke Usui

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

The ζ potential of quartz and sapphire plates in contact with aqueous solutions was measured by means of the plane interface technique, which involves establishing the liquid flow velocity-depth profile using reference (polystyrene latex) particles. The electroosmotic velocity obtained by extrapolation of the velocity profile to the cell wall permits calculation of the ζ potential of the cell wall-solution interface. The plane interface technique was also used to obtain the ζ potential at aqueous sodium dodecyl sulfate (SDS) solution surfaces with an open cell in which the upper boundary consists of an air-solution interface and the lower boundary, a quartz-solution interface. It was essential to eliminate the meniscus in the open cell to obtain normal velocity profiles. The ζ potential of the aqueous SDS solution surface paralleled the Stern potential, calculated from the surface tension-SDS concentration data by use of Gibbs adsorption equation and Gouy-Chapman theory, though the former was larger in magnitude than the latter.

Original languageEnglish
Pages (from-to)266-271
Number of pages6
JournalJournal of Colloid And Interface Science
Volume142
Issue number1
DOIs
Publication statusPublished - 1991 Mar 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry

Fingerprint Dive into the research topics of 'ζ potential measurement by means of the plane interface technique'. Together they form a unique fingerprint.

  • Cite this