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 et de médecine
Department
Département de Physique
Language
  • English
Classification
Physics
License
License undefined
Identifiers
Persistent URL
https://folia.unifr.ch/unifr/documents/302566
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