Oscillatory packing and depletion of polyelectrolyte molecules at an oxide-water interface

Biggs, Simon, Dagastine, Raymond R. and Prieve, Dennis C. (2002) Oscillatory packing and depletion of polyelectrolyte molecules at an oxide-water interface. Journal of Physical Chemistry Part B, 106 44: 11557-11564. doi:10.1021/jp026425k


Author Biggs, Simon
Dagastine, Raymond R.
Prieve, Dennis C.
Title Oscillatory packing and depletion of polyelectrolyte molecules at an oxide-water interface
Journal name Journal of Physical Chemistry Part B   Check publisher's open access policy
ISSN 1520-6106
1520-5207
Publication date 2002-11-01
Sub-type Article (original research)
DOI 10.1021/jp026425k
Open Access Status Not yet assessed
Volume 106
Issue 44
Start page 11557
End page 11564
Total pages 8
Place of publication Washington, DC, United States
Publisher American Chemical Society
Language eng
Formatted abstract
Total internal reflection microscopy (TIRM) has been used to study the interactions between a 5 μm borosilicate glass sphere and a silica slide in the presence of a nonadsorbing polyelectrolyte, sodium (polystyrene sulfonate) (NaPSS). The effect of the polymer concentration, within the dilute solution regime, on the observed interactions was investigated. In all cases, the interactions displayed a short-range electrostatic repulsion followed immediately, at larger separations, by a decaying oscillatory interaction that is attributed to structuring of the polyelectrolyte in solution. The periodicity of the oscillations, as a function of concentration, indicates that at large surface separations the polymer chains are ordered as a nonintermixing, space-filling, latex. At polymer concentrations of between 200 and 1000 ppm, a transition to a system of ordered rods, parallel to the interface was seen for the final layer of polymer molecules.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Engineering Publications
 
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