Application of a dynamic atomic force microscope for the measurement of lubrication forces and hydrodynamic thickness between surfaces bearing adsorbed polyelectrolyte layers

Notley, Shannon M., Biggs, Simon and Craig, Vincent S. J. (2003) Application of a dynamic atomic force microscope for the measurement of lubrication forces and hydrodynamic thickness between surfaces bearing adsorbed polyelectrolyte layers. Macromolecules, 36 8: 2903-2906. doi:10.1021/ma025761w


Author Notley, Shannon M.
Biggs, Simon
Craig, Vincent S. J.
Title Application of a dynamic atomic force microscope for the measurement of lubrication forces and hydrodynamic thickness between surfaces bearing adsorbed polyelectrolyte layers
Journal name Macromolecules   Check publisher's open access policy
ISSN 0024-9297
1520-5835
Publication date 2003-04-01
Sub-type Article (original research)
DOI 10.1021/ma025761w
Open Access Status Not yet assessed
Volume 36
Issue 8
Start page 2903
End page 2906
Total pages 4
Place of publication Washington, DC, United States
Publisher American Chemical Society
Language eng
Abstract An atomic force microscope, modified to perform dynamic measurements, has been used to measure the lubrication forces between a colloid probe and flat substrate in the normal direction. The hydrodynamic interactions were measured for bare surfaces and for surfaces with an adsorbed layer of the weak polyelectrolyte, poly(2-vinylpyridine) in aqueous solution. The flow of liquid between the surfaces is described in terms of the effective mobility, G. At surface separations far exceeding twice the equilibrium steric layer thickness, the solvent between the surfaces is Newtonian with a viscosity equal to that of the bulk electrolyte solution. However, there is significant deviation from Newtonian behavior and a large increase in the effective viscosity at surface separations less than twice the steric layer thickness, due to the restricted drainage of solvent between overlapping polyelectrolyte chains. Using the dynamic AFM technique, it was possible to determine the hydrodynamic thickness of the adsorbed polyelectrolyte layer.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Faculty of Engineering, Architecture and Information Technology Publications
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 20 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 25 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Fri, 13 Jun 2014, 20:00:55 EST by System User on behalf of Learning and Research Services (UQ Library)