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Issue 18, 2010
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Capillary micromechanics: Measuring the elasticity of microscopic soft objects

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Abstract

We present a simple method for accessing the elastic properties of microscopic deformable particles. This method is based on measuring the pressure-induced deformation of soft particles as they are forced through a tapered glass microcapillary. It allows us to determine both the compressive and the shear modulus of a deformable object in one single experiment. Measurements on a model system of poly-acrylamide microgel particles exhibit good agreement with measurements on bulk gels of identical composition. Our approach is applicable over a wide range of mechanical properties and should thus be a valuable tool for the characterization of a variety of soft and biological materials.

Graphical abstract: Capillary micromechanics: Measuring the elasticity of microscopic soft objects

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Article information


Submitted
17 Feb 2010
Accepted
10 Jun 2010
First published
09 Aug 2010

Soft Matter, 2010,6, 4550-4555
Article type
Paper

Capillary micromechanics: Measuring the elasticity of microscopic soft objects

H. M. Wyss, T. Franke, E. Mele and D. A. Weitz, Soft Matter, 2010, 6, 4550
DOI: 10.1039/C003344H

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