| Issue |
Matériaux & Techniques
Volume 89, 2001
“Intelligent” materials and systems
|
|
|---|---|---|
| Page(s) | 37 - 39 | |
| DOI | https://doi.org/10.1051/mattech/200189120037s | |
| Published online | 21 June 2017 | |
Ferrofluids: nanomotors and nanogenerators
1 Laboratoire des Milieux Désordonnés et Hétérogènes, Univ. Paris 6, Tour 13, Case 78, 75252 Paris cedex 05, France
2 Laboratoire de Biorhéologie et Hydrodynamique Physicochimique, Univ. Paris 6 et 7, Tour 33, Case 7056. 75251 Paris Cedex 05, France
3 Dept of Phys. of Complex Systems, Weizmann Institute of Science, Rehovot 76100, Israel
We submit a CoFe2O4 ferrofluid in rigid rotation to an alternating magnetic field. Rotational viscosity and transverse magnetization are measured simultaneously. Depending on the relative values of fluid vorticity and field frequency, the magnetic particles behave as nanomotors or nanogenerators. It demonstrates the energy conversion between the magnetic and kinetic degrees of freedom of the particles.
© SIRPE 2001
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