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arXiv 1209.0032cond-mat.softcond-mat.mtrl-sciphysics.bio-ph
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毛细管微观力学:测量微观柔软物体的弹性

Capillary micromechanics: Measuring the elasticity of microscopic soft objects

Hans M. Wyss, Thomas Franke, Elisa Mele, David A. Weitz

摘要:

我们提出了一个简单的方法来访问微观可变形颗粒的弹性性能。这种方法是基于测量软颗粒的压力引起的变形,因为它们被迫通过锥形玻璃微毛细管。它使我们能够在一个单一的实验中确定的压缩和剪切模量的变形对象。聚丙烯酰胺微凝胶颗粒的模型系统上的测量表现出良好的一致性,与相同组成的散装凝胶的测量。我们的方法适用于广泛的机械性能,因此应该是一个有价值的工具,用于表征各种软和生物材料。

英文摘要:

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 excellent 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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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