Advanced Search

Browse by Discipline

Scientific Societies

E-print Alerts

Add E-prints

E-print Network

  Advanced Search  

[LR7573E]059101PRE Contact-angle hysteresis in solid-on-solid wetting

Summary: PROOF
Contact-angle hysteresis in solid-on-solid wetting
Phil Attard
Ian Wark Research Institute, University of South Australia, Mawson Lakes, SA 5095 Australia
Received 24 April 2000; revised manuscript received 1 September 2000
The spreading of an elastic adhesive sphere on a substrate is calculated using continuum elasticity theory and
the van der Waals interaction between the solid surfaces. The deformation and contact area are obtained
self-consistently as a function of load. Hysteresis is demonstrated between the loading and the unloading
cycles: the receding contact angle exceeds the advancing one. In addition, for a given deformation flattening ,
or for a given applied load, the receding contact area exceeds the advancing one. This nonequilibrium phe-
nomenon is velocity dependent and in accord with experiments on adhesion and crack propagation.
DOI: 10.1103/PhysRevE.63.0116XX PACS number s : 68.03.Cd, 62.20.Fe, 68.35.Md
The angles between the phase boundaries at a line of three
phase contact depend upon the interfacial energies of the
phases. For a liquid drop on a solid in a vapor the Young
equation gives
sv sl lv cos slv , 1
where the are the surface energies of the three interfaces,


Source: Attard, Phil - School of Chemistry, University of Sydney


Collections: Chemistry