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Role of the Shuttleworth effect in adhesion on elastic surfaces

Published online by Cambridge University Press:  22 March 2016

Shayandev Sinha
Affiliation:
Department of Mechanical Engineering, University of Maryland, College Park, Maryland 20742, United States
Siddhartha Das*
Affiliation:
Department of Mechanical Engineering, University of Maryland, College Park, Maryland 20742, United States
*
*E-mail: sidd@umd.edu
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Abstract

The Shuttleworth effect ensures that at an interface, where one of the phases is an elastic solid, surface stress is not equal to the surface energy. In this paper, we provide a free energy based approach to quantify the impact of the Shuttleworth effect in the adhesion of a rigid, spherical particle on an elastic solid. Our paper has four key findings. Firstly, we demonstrate that the difference in the elastic-solid-particle surface stress and surface energies is linearly proportional to the adhesion energy. Secondly, we establish that the surface stresses being larger than the surface energies provide the sufficient condition for an energetically favorable adhesion. Thirdly, we show that for a given adhesion energy and solid-vapor surface energy increase in particle-vapor surface energy makes the adhesion, in presence of the Shuttleworth effect, more favorable. Finally, and most importantly, we identify the necessary parameter space corresponding to which the Shuttleworth effect may or may not enhance the adhesion as compared to the case that does not account for the Shuttleworth effect. We anticipate that our findings will significantly impact our understanding of a plethora of problems involving adhesion and indentation on soft surfaces, such as nanoparticle adhesion on cells, nanoindentation based characterization of soft solids, applications of adhesion-based soft lithography techniques, etc.

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Articles
Copyright
Copyright © Materials Research Society 2016 

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