Interaction forces between metal-chelating lipid monolayers measured by colloidal probe atomic force microscopy

Ryo Ishiguro, Darryl Y. Sasaki, Charles Pacheco, Kazue Kurihara

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

Surface forces between LB films of metal-chelating lipids in water have been studied using colloidal probe atomic force microscopy. The LB films of an amphiphile functionalized by the iminodiacetic acid group were prepared on hydrophobic glass substrates. The electric double layer repulsion operated between these LB film surfaces changed depending on pH reflecting the different protonation states of the iminodiacetic acid groups. The titration curve of the iminodiacetic acid monolayer was obtained from the force profiles. The Cu2+ complexation process was also monitored by measuring the force profiles at various Cu2+ ion concentrations.

Original languageEnglish
Pages (from-to)329-335
Number of pages7
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume146
Issue number1-3
DOIs
Publication statusPublished - 1999 Jan 15

Keywords

  • Colloidal probe atomic force microscopy
  • Interaction forces
  • Lipid monolayers

ASJC Scopus subject areas

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

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