Synthesis and Magnetic Properties of Iron Nanoeilipsoids Bioinspired by Magnetotactic Bacteria

摘要

Ferromagnetic iron nanoeilipsoids were prepared by the hydrogen reduction of ellipsoidal hematite nanoarchitectures. These magnetic nanoscale particles displayed a microstructure that showed clear similarities to the magnetosome chains of the magnetotactic bacteria. Specifically, such nanoeilipsoids are formed by single-domain nanocrystals assembled into double chains sharing the same crystallographic orientation. In the present contribution, the magnetic properties of the Fe nanoeilipsoids were explained considering the chain of spheres model of Jacobs and Bean, and thermal effects.