Volume 68, Number 2, October 2004
|Page(s)||212 - 218|
|Section||Condensed matter: structure, mechanical and thermal properties|
|Published online||01 October 2004|
Elasticity of an interfacial particle raft
Division of Engineering and Applied Sciences, Harvard University Cambridge, MA 02138, USA
2 Department of Applied Mathematics and Theoretical Physics University of Cambridge - Wilberforce Road, Cambridge, CB3 0WA, UK
Corresponding author: firstname.lastname@example.org
Accepted: 30 August 2004
We study the collective behaviour of a close-packed monolayer of non-Brownian particles at a fluid-liquid interface. Such a particle raft forms a two-dimensional elastic solid and can support anisotropic stresses and strains, e.g. it buckles in uniaxial compression and cracks in tension. We characterise this solid in terms of Young's modulus and Poisson ratio derived from simple theoretical considerations and show the validity of these estimates by using an experimental buckling assay to deduce Young's modulus.
PACS: 62.20.Dc – Elasticity, elastic constants / 68.03.-g – Gas-liquid and vacuum-liquid interfaces / 46.32.+x – Static buckling and instability
© EDP Sciences, 2004
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