Rod-shaped nanostructures based on superparamagnetic nanocrystals as viscosity sensors in liquid

Marco Allione*, Bruno Torre, Alberto Casu, Andrea Falqui, Philomena Piacenza, Riccardo Di Corato, Teresa Pellegrino, Alberto Diaspro

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


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.

Original languageEnglish (US)
Article number064907
JournalJournal of Applied Physics
Issue number6
StatePublished - Sep 15 2011
Externally publishedYes

Bibliographical note

Funding 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


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