Journal article

Magnetic orientation of soft particles in a jammed solid

  • Dagallier, Camille University of Fribourg, Soft Matter and Photonics Group and Fribourg Center for Nanomaterials, Department of Physics, Switzerland
  • Cardinaux, Frédéric University of Fribourg, Soft Matter and Photonics Group and Fribourg Center for Nanomaterials, Department of Physics, Switzerland
  • Dietsch, Hervé University of Fribourg, Adolphe Merkle Institute and Fribourg Center for Nanomaterials, Marly, Switzerland
  • Scheffold, Frank University of Fribourg, Soft Matter and Photonics Group and Fribourg Center for Nanomaterials, Department of Physics, Switzerland
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    20.01.2012
Published in:
  • Soft Matter. - 2012, vol. 8, no. 15, p. 4067-4071
English Densely packed atoms, molecules, or small particles can get trapped in a jammed state thereby avoiding crystallization. The resulting amorphous structures display complex, spatially heterogeneous, trapping potentials in stark contrast to the uniform case of a crystal. Here we study active and passive rotational motion in a jammed colloidal dispersion of particles consisting of an anti-ferromagnetic core and a thermo-sensitive microgel soft shell. We determine the order parameter as a function of volume fraction from optical birefringence measurements. A simple model allows us to discriminate the orientation and relaxation of different subsets of particles according to their elastic trapping state.
Faculty
Faculté des sciences
Department
Physique
Language
  • English
Classification
Physics
License
License undefined
Identifiers
Persistent URL
https://folia.unifr.ch/unifr/documents/302566
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