Simple analytical model for the magnetophoretic separation of superparamagnetic dispersions in a uniform magnetic gradient
Andreu Segura, Jordi (Institut de Ciència de Materials de Barcelona)
Camacho Castro, Juan (Universitat Autònoma de Barcelona. Departament de Física)
Faraudo, Jordi (Institut de Ciència de Materials de Barcelona)
Benelmekki, Maria. (Universidade do Minho (Braga, Portugal). Centro de Fisica)
Rebollo, C. (Parc Tecnologic del Valles. Sepmag Tecnologies)
Martínez, Ll. M. (Sepmag Technologies (Atlanta, Estats Units d'Amèrica))

Data:	2011
Resum:	Magnetophoresis-the motion of magnetic particles under applied magnetic gradient-is a process of great interest in novel applications of magnetic nanoparticles and colloids. In general, there are two main different types of magnetophoresis processes: cooperative magnetophoresis (a fast process enhanced by particle-particle interactions) and noncooperative magnetophoresis (driven by the motion of individual particles in magnetic fields). In the case of noncooperative magnetophoresis, we have obtained a simple analytical solution which allows the prediction of the magnetophoresis kinetics from particle characterization data (size and magnetization). Our comparison with new experimental results shows good quantitative agreement. In addition, we show the existence of a universal curve onto which all experimental results should collapse after proper rescaling. The range of applicability of the analytical solution is discussed in light of the predictions of a magnetic aggregation model.
Drets:	Tots els drets reservats.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Publicat a:	Physical review. E : Statistical, nonlinear, and soft matter physics, Vol. 84, Number 2 (August 2011) , p. 021402/1-021402/8, ISSN 1539-3755

DOI: 10.1103/PhysRevE.84.021402
PMID: 21928989

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