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Dynamics of interactions involving deformable drops : hydrodynamic dimpling under attractive and repulsive electrical double layer interactions

Manica, Rogério, Connor, Jason N., Carnie, Steven L., Horn, Roger G. and Chan, Derek Y. C. 2007, Dynamics of interactions involving deformable drops : hydrodynamic dimpling under attractive and repulsive electrical double layer interactions, Langmuir, vol. 23, no. 2, pp. 626-637, doi: 10.1021/la0620760.

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Title Dynamics of interactions involving deformable drops : hydrodynamic dimpling under attractive and repulsive electrical double layer interactions
Author(s) Manica, Rogério
Connor, Jason N.
Carnie, Steven L.
Horn, Roger G.
Chan, Derek Y. C.
Journal name Langmuir
Volume number 23
Issue number 2
Start page 626
End page 637
Publisher American Chemical Society
Place of publication Washington, D. C.
Publication date 2007
ISSN 0743-7463
1520-5827
Summary A model developed previously to analyze force measurements between two deformable droplets in the atomic force microscope [Langmuir 2005, 21, 2912-2922] is used to model the drainage of an aqueous film between a mica plate and a deformable mercury drop for both repulsive and attractive electrical double-layer interactions between the mica and the mercury. The predictions of the model are compared with previously published data [Faraday Discuss. 2003, 123, 193-206] on the evolution of the aqueous film whose thickness has been measured with subnanometer precision. Excellent agreement is found between theoretical results and experimental data. This supports the assumptions made in the model which include no-slip boundary conditions at both interfaces. Furthermore, the successful fit attests to the utility of the model as a tool to explore details of the drainage mechanisms of nanometer-thick films in which fluid flow, surface deformations, and colloidal forces are all involved. One interesting result is that the model can predict the time at which the aqueous film collapses when attractive mica-mercury forces are present without the need to invoke capillary waves or other local instabilities of the mercury/electrolyte interface.
Notes Article first published online 6th December, 2006
Language eng
DOI 10.1021/la0620760
Field of Research 030603 Colloid and Surface Chemistry
020405 Soft Condensed Matter
Socio Economic Objective 970103 Expanding Knowledge in the Chemical Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2007, American Chemical Society
Persistent URL http://hdl.handle.net/10536/DRO/DU:30041476

Document type: Journal Article
Collection: Centre for Material and Fibre Innovation
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