Dynamic features of short-range interaction force and adhesion in solutions

Ivan U. Vakarelski, Ko Higashitani*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

39 Scopus citations

Abstract

A dynamic procedure in atomic force microscopy was employed to investigate the adhesion and the short-range interaction force between a silica sphere and a mica plate in pure water and LiCl and CsCl solutions. The long-range interaction force was independent of the dynamic procedure of measuring. On the other hand, the apparent short-range force curve and the adhesive force depended on the approach velocity of surfaces and the contact time, respectively, and both of them depended on the history of the contact of surfaces prior to the measurement, as well as the electrolyte concentration and cationic species. These results indicated that there exist two kinds of structured layers on the surface; the thin but firm primary layer composed of water molecules, cations, and hydrated cations adsorbed onto the surface and the thick but fragile secondary layer outside the primary layer.

Original languageEnglish (US)
Pages (from-to)110-120
Number of pages11
JournalJournal of Colloid and Interface Science
Volume242
Issue number1
DOIs
StatePublished - Oct 1 2001
Externally publishedYes

Keywords

  • Adhesion
  • Atomic force microscope
  • Hydration enthalpy
  • Hydration repulsion
  • Structured force

ASJC Scopus subject areas

  • Colloid and Surface Chemistry
  • Physical and Theoretical Chemistry
  • Surfaces and Interfaces

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