Dipolar interactions of NP in cells

Modeling magnetic nanoparticle dipole-dipole interactions inside living cells.
Michael Lévy, Florence Gazeau, Jean-Claude Bacri, Claire Wilhelm, and Martin Devaud
Phys. Rev. B 84, 075480 (2011)

Model of spherical lysosome with a magnetization Mlys under an applied magnetic field B0. The Lorentz cavity around a particular (SP) NP (in dark) is displayed and the surface currents I and i on the surface of the lysosome and of the cavity, respectively, are also represented.

Take a look also to the related articles by the same group:

Nanomagnetism reveals the intracellular clustering of iron oxide nanoparticles in the organism.
Michael Levy , Claire Wilhelm , Nathalie Luciani , Vanessa Deveaux , François Gendron , Alain Luciani , Martin Devaud and Florence Gazeau
Nanoscale 3, 4402 (2011)

Long term in vivo biotransformation of iron oxide nanoparticles.
Michael Levy, Nathalie Luciani, Damien Alloyeau, Dan Elgrabli, Vanessa Deveaux, Christine Pechoux, Sophie Chat, Guillaume Wang, Nidhi Vats, François Gendron,Cécile Factor, Sophie Lotersztajn, Alain Luciani, Claire Wilhelm, Florence Gazeau
Biomaterials 32, 3988 (2011)