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Findings from University of Twente in Physics Research Reported (Capillarity of soft amorphous solids: a microscopic model for surface stress)

July 29, 2014

By a News Reporter-Staff News Editor at Physics Week -- Data detailed on Physics Research have been presented. According to news reporting originating in Enschede, Netherlands, by VerticalNews journalists, research stated, "The elastic deformation of a soft solid induced by capillary forces crucially relies on the excess stress inside the solid-liquid interface. While for a liquid-liquid interface this 'surface stress' is strictly identical to the 'surface free energy,' the thermodynamic Shuttleworth equation implies that this is no longer the case when one of the phases is elastic."

The news reporters obtained a quote from the research from the University of Twente, "Here we develop a microscopic model that incorporates enthalpic interactions and entropic elasticity, based on which we explicitly compute as the surface stress and surface free energy. It is found that the compressibility of the interfacial region, through the Poisson ratio near the interface, determines the difference between surface stress and surface energy."

According to the news reporters, the research concluded: "We highlight the consequence of this finding by comparing with recent experiments and simulations on partially wetted soft substrates."

For more information on this research see: Capillarity of soft amorphous solids: a microscopic model for surface stress. Physical Review E, Statistical, Nonlinear, and Soft Matter Physics, 2014;89(4):042408.

Our news correspondents report that additional information may be obtained by contacting J.H. Weijs, Physics of Fluids Group and MESA+ Institute for Nanotechnology, University of Twente, P O Box 217, 7500 AE Enschede, Netherlands. Additional authors for this research include J.H. Snoeijer and B. Andreotti.

Keywords for this news article include: Enschede, Netherlands, Europe, Physics Research.

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Source: Physics Week

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