Mesoscopic structures of maghemite nanocrystals: fabrication, magnetic properties, and uses.
Mesoscopic structures made of maghemite (gamma-Fe2O3) nanocrystals with different coatings and shapes are described. They are controlled by a combination of van der Waals and magnetic dipolar interactions and their shapes are responsible for the collective magnetic response of the nanocrystals. It is shown that spherical gamma-Fe2O3 nanocrystals can be used as a mask to reproduce the mesoscopic structure on a silicon wafer.
Pileni
Marie-Paule
MP
Laboratoire des Matériaux Mésoscopiques et Nanomètriques, LM2N, Université Pierre et Marie Curie, UMR 7070, BP 52, 4 place Jussieu, 75005 Paris, France. pileni@sri.jussieu.fr
Ngo
Anh-Tu
AT