Mechanical response of active gels

We study a model of an active gel of cross-linked semiflexible filaments with additional active linkers such as myosin II clusters. We show that the coupling of the elasticity of the semiflexible filaments to the mechanical properties of the motors leads to contractile behavior of the gel, in qualitative agreement with experimental observations. The motors, however, soften the zero-frequency elastic constant of the gel. When the collective motor dynamics is incorporated in the model, a stiffening of the network at high frequencies is obtained. The frequency controlling the crossover between low- and high-frequency network elasticity is estimated in terms of microscopic properties of motors and filaments, and can be as low as 10−3 Hz.

• Publication year

  2008

• Venue

  EPL (Europhysics Letters)

• Publication date

  2008-07-18

• Fields of study

  Materials Science, Physics

• Identifiers
  DOI 10.1209/0295-5075/85/18007arXiv 0807.3031
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

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