NDLI: Determining the mechanical response of particle-laden fluid interfaces using surface pressure isotherms and bulk pressure measurements of droplets

Content Provider	Royal Society of Chemistry (RSC)
Author	Jung, Eric Fuller, Gerald G. Kirkwood, John Xu, Hui Monteux, Cécile
Copyright Year	2007
Abstract	The mechanical response of particle-laden fluid interfaces is determined by measuring the internal pressures of particle-coated drops as a function of the drop volume. The particle monolayers undergoing compression–expansion cycles exhibit three distinct states: fluid state, jammed state, and buckled state. The P–V curves are compared to the surface pressure isotherms Π–A that are measured using a Langmuir trough and a Wilhelmy plate on a flat water–decane interface covered with the same particles. We find that in the fluid and jammed states, the water drop in decane can be described by the Young–Laplace equation. Therefore in these relatively low compression states, the bulk pressure measurements can be used to deduce the interfacial tension of the droplets and yield similar surface pressure isotherms to the ones measured with the Wilhelmy plate. In the buckled state, the internal pressure of the drop yields a zero value, which is consistent with the zero interfacial tension measured with the Wilhelmy plate. Moreover we find that the compressibility in the jammed state does not depend on the particle size.
Starting Page	6344
Ending Page	6350
Page Count	7
File Format	HTM / HTML PDF
ISSN	14639076
Volume Number	9
Issue Number	48
Journal	Physical Chemistry Chemical Physics
DOI	10.1039/b708962g
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Decane Young\u2013Laplace equation Compressibility Langmuir\u2013Blodgett trough Surface tension Wilhelmy plate Laplace
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy Physical and Theoretical Chemistry

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