Capillary micromechanics: Measuring the elasticity of microscopic soft objects

Citation:

Wyss, H. M. ; Franke, T. ; Mele, E. ; Weitz, D. A. Capillary micromechanics: Measuring the elasticity of microscopic soft objects. Soft Matter 2010, 6 4550-4555. Copy at http://www.tinyurl.com/mowlbo9
[PDF]211 KB

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 polyacrylamide 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.

Notes:

Times Cited: 14

Last updated on 04/15/2014