Hydrophobic attraction as revealed by AFM force measurements and molecular dynamics simulation

Fa, Keqing, Nguyen, Anh V. and Miller, Jan D. (2005) Hydrophobic attraction as revealed by AFM force measurements and molecular dynamics simulation. Journal of Physical Chemistry B, 109 27: 13112-13118. doi:10.1021/jp0445526


Author Fa, Keqing
Nguyen, Anh V.
Miller, Jan D.
Title Hydrophobic attraction as revealed by AFM force measurements and molecular dynamics simulation
Journal name Journal of Physical Chemistry B   Check publisher's open access policy
ISSN 1520-6106
Publication date 2005-07-14
Sub-type Article (original research)
DOI 10.1021/jp0445526
Volume 109
Issue 27
Start page 13112
End page 13118
Total pages 7
Place of publication Washington, D. C.
Publisher Americal Chemical Society
Language eng
Subject 0914 Resources Engineering and Extractive Metallurgy
091404 Mineral Processing/Beneficiation
Abstract Spherical calcium dioleate particles (similar to 10 mu m in diameter) were used as AFM (atomic force microscope) probes to measure interaction forces of the collector colloid with calcite and fluorite surfaces. The attractive AFM force between the calcium dioleate sphere and the fluorite surface is strong and has a longer range than the DLVO (Derjaguin-Landau-Verwey-Overbeek) prediction. The AFM force between the calcium dioleate sphere and the mineral surfaces does not agree with the DLVO prediction. Consideration of non-DLVO forces, including the attractive hydrophobic force and the repulsive hydration force, was necessary to explain the experimental results. The non-DLVO interactions considered were justified by the different interfacial water structures at calcite- and fluorite-water interfaces as revealed by the numerical computation experiments with molecular dynamics simulation.
Keyword Chemistry, Physical
Preadsorbed Sodium Oleate
Long-range Attraction
Interatomic Potentials
Calcium-fluoride
Water Vapour
Ionic Solids
Surfaces
Adsorption
Model
Dependence
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Chemical Engineering Publications
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 12 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 13 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Wed, 17 Oct 2007, 13:46:06 EST