Superparamagnetic nanostructures are becoming increasingly important as tools for biological and medical applications. We report the study of the movement of rod-shaped assemblies of superparamagnetic nanocrystals under the action of a rotating magnetic field. The dynamic was characterized by means of light scattering detection at different frequencies and for different values of the intensity of the applied external field. The possibility to correlate the motion to the viscosity of the medium is used to monitor viscosity changes inside the liquid. We propose this technique as a valuable tool to monitor viscosity at microscale for application in biological studies.
Bibliographical noteFunding Information:
We thank Alberto Barone, Luca Ceseracciu and Riccardo Carzino for a critical revision of the manuscript and for fruitful discussions. This work was partially supported by the European project Magnifyco (Contract NMP4-SL-2009-228622).
ASJC Scopus subject areas
- General Physics and Astronomy