Issue 15, 2010
From the journal:

Soft Matter

Monitoring gelation using magnetic nanoparticles†

Carola Barrera,a   Vivian Florián-Algarin,a   Aldo Acevedoa  and  Carlos Rinaldi*a  

* Corresponding authors

a Department of Chemical Engineering, University of Puerto Rico, Mayagüez, PR, USA
E-mail: carlos.rinaldi@upr.edu
Fax: +1 787-265-3818
Tel: +1 787-832-4040

Abstract

The temperature dependent response of magnetic nanoparticles in oscillating magnetic fields was used to monitor gelation of the surrounding fluid at the size scale of the nanoparticles. The dynamic susceptibility of PEG-coated cobalt ferrite nanoparticles suspended in an aqueous gelatin solution had sharp transitions which correlated with gelation and melting observed using macroscale rheological measurements. The reported method requires small sample volumes and provides information on network formation at the scale of the probe nanoparticles.

Graphical abstract: Monitoring gelation using magnetic nanoparticles

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Article information

DOI
https://doi.org/10.1039/C003284K
Article type
Paper
Submitted
17 Feb 2010
Accepted
17 May 2010
First published
14 Jun 2010

Soft Matter, 2010,6, 3662-3668

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Monitoring gelation using magnetic nanoparticles

C. Barrera, V. Florián-Algarin, A. Acevedo and C. Rinaldi, Soft Matter, 2010, 6, 3662 DOI: 10.1039/C003284K

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