Publikation:

Active and Nonlinear Microrheology in Dense Colloidal Suspensions

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2009

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Gazuz, Igor
Puertas, Antonio Manuel

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http://nbn-resolving.de/urn:nbn:de:bsz:352-opus-109527
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https://doi.org/10.1103/PhysRevLett.102.248302
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Published

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Physical review letters. 2009, 102, 135701. Available under: doi: 10.1103/PhysRevLett.102.248302

Zusammenfassung

We present a first-principles theory for the active nonlinear microrheology of colloidal model system; for a constant external force on a spherical probe particle embedded in a dense host dispersion, neglecting hydrodynamic interactions, we derive an exact expression for the friction. Within mode-coupling theory, we discuss the threshold external force needed to delocalize the probe from a host glass, and its relation to strong nonlinear velocity-force curves in a host fluid. Experimental microrheology data and simulations, which we performed, are explained with a simplified model.

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530 Physik

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ISO 690GAZUZ, Igor, Antonio Manuel PUERTAS, Thomas VOIGTMANN, Matthias FUCHS, 2009. Active and Nonlinear Microrheology in Dense Colloidal Suspensions. In: Physical review letters. 2009, 102, 135701. Available under: doi: 10.1103/PhysRevLett.102.248302
BibTex
@article{Gazuz2009Activ-5052,
  year={2009},
  doi={10.1103/PhysRevLett.102.248302},
  title={Active and Nonlinear Microrheology in Dense Colloidal Suspensions},
  volume={102},
  journal={Physical review letters},
  author={Gazuz, Igor and Puertas, Antonio Manuel and Voigtmann, Thomas and Fuchs, Matthias},
  note={Article Number: 135701}
}
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