Fragile structured layers on surfaces in highly concentrated solutions of electrolytes of various valencies

Ying Li, Yoichi Kanda, Hiroyuki Shinto, Ivan Uriev Vakarelski, Ko Higashitani*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

In the present study a dynamic mode of atomic force microscopy for force measurements was employed to investigate the hydration repulsion force between charged surfaces in highly concentrated electrolyte solutions of NaCl, MgCl 2 and LaCl3. A strong dependence of this repulsive force on the approaching rate of surfaces, the prehistory of their contact and the valency of cations was demonstrated. The phenomena were strongly pronounced in the cases of high scan rates, large surfaces and cations of high valency. The results obtained indicate that a fragile structure composed of water molecules, ions and hydrated ions exists outside of the primary layer of water molecules and ions adsorbed firmly on surfaces.

Original languageEnglish (US)
Pages (from-to)39-43
Number of pages5
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume260
Issue number1-3
DOIs
StatePublished - Jun 15 2005
Externally publishedYes

Keywords

  • Approaching rate
  • Atomic force microscopy
  • Electrolyte solution
  • Fragile structured layer
  • Short-range repulsive force

ASJC Scopus subject areas

  • Colloid and Surface Chemistry

Fingerprint Dive into the research topics of 'Fragile structured layers on surfaces in highly concentrated solutions of electrolytes of various valencies'. Together they form a unique fingerprint.

Cite this