The importance of aspect ratio in profile analysis tensiometry

Karakashev, S. I. and Nguyen, A. V. (2009) The importance of aspect ratio in profile analysis tensiometry. Journal of Colloid and Interface Science, 330 2: 501-504. doi:10.1016/j.jcis.2008.11.034


Author Karakashev, S. I.
Nguyen, A. V.
Title The importance of aspect ratio in profile analysis tensiometry
Journal name Journal of Colloid and Interface Science   Check publisher's open access policy
ISSN 0021-9797
Publication date 2009-02-15
Year available 2008
Sub-type Article (original research)
DOI 10.1016/j.jcis.2008.11.034
Volume 330
Issue 2
Start page 501
End page 504
Total pages 5
Editor D. T. Wasan
Place of publication San Diego, CA, USA
Publisher Elsevier
Collection year 2010
Language eng
Subject 030603 Colloid and Surface Chemistry
970103 Expanding Knowledge in the Chemical Sciences
Formatted abstract
The latest developments in profile analysis tensiometry (PAT) for determining surface tension and interfacial viscoelastic parameters involve the determination of a digital interface profile and its best fit with the Young–Laplace equation. In this short communication, we show that the results for surface tension and other interfacial parameters determined by PAT are extremely sensitive to the (aspect) ratio of length to width of a pixel. Fine calibration (to five decimal digits) for the aspect ratio required to obtain physically consistent results is not always achieved with conventional numerical procedures due to nanometer resolution limit of optical imaging devices but can be manually adjusted using the known surface tension of pure water and/or surfactant solutions at reference temperature.
Keyword Profile analysis tensiometry
Surface tension
Surface rheology
Drop shape-analysis
Interfacial tension
Pendant Drop
Contact-angle
automation
Monolayers
Accuracy
rheology
Layers
Q-Index Code C1
Q-Index Status Provisional Code

Document type: Journal Article
Sub-type: Article (original research)
Collections: Faculty of Engineering, Architecture and Information Technology Publications
School of Chemical Engineering Publications
 
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Created: Fri, 26 Feb 2010, 15:50:02 EST by Dr Orhan Ozdemir on behalf of School of Chemical Engineering