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Accounting for inertia effects to access the high-frequency microrheology of viscoelastic fluids

  • Domínguez-García, P. Departamento de Física de Materiales, Universidad Nacional de Educación a Distancia (UNED), Madrid, Spain
  • Cardinaux, Frédéric Department of Physics, University of Fribourg, Switzerland - LS Instruments AG, Fribourg, Switzerland
  • Bertseva, Elena Laboratory of Physics of Complex Matter, Ecole Polytechnique Fédérale de Lausanne (EPFL), Switzerland
  • Forró, László Laboratory of Physics of Complex Matter, Ecole Polytechnique Fédérale de Lausanne (EPFL), Switzerland
  • Scheffold, Frank Department of Physics, University of Fribourg, Switzerland
  • Jeney, Sylvia Laboratory of Physics of Complex Matter, Ecole Polytechnique Fédérale de Lausanne (EPFL), Switzerland
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    02.12.2014
Published in:
  • Physical Review E. - 2014, vol. 90, no. 6, p. 060301
English We study the Brownian motion of microbeads immersed in water and in a viscoelastic wormlike micelles solution by optical trapping interferometry and diffusing wave spectroscopy. Through the mean-square displacement obtained from both techniques, we deduce the mechanical properties of the fluids at high frequencies by explicitly accounting for inertia effects of the particle and the surrounding fluid at short time scales. For wormlike micelle solutions, we recover the 3/4 scaling exponent for the loss modulus over two decades in frequency as predicted by the theory for semiflexible polymers.
Faculty
Faculté des sciences et de médecine
Department
Département de Physique
Language
  • English
Classification
Physics
License
License undefined
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Persistent URL
https://folia.unifr.ch/unifr/documents/304241
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