Formation of coated bcc-Fe magnetic nanoparticles
Fe bcc nanoparticles coated with a biocompatible surfactant, Poly-TetraMethylene-Glycol, have been produced by the microemulsion method using inverse micelle microreactors. The reaction can be done: type 1, by adding a solid reduction agent, or type 2, by mixing with a secondary microemulsion carrying the reduction agent. Nanoparticles obtained by the two methods have different properties as higher saturation magnetization and thermal stability for those of type 2. However, X Rays, TEM and magnetic measurements (coercivity and ZFC-FC curves) are unable to clearly distinguish such features as size, shape and distribution of the Fe MNPs. We propose a "in situ" study of the evolution of the MNPs for both types of reaction and different micelle size in appropriate environments of deuterated solvents to enhance the contrast of the micelles or the Fe MNPs. 1 day in D20 will be used for the size evolution, while another day in D22 can give the final shape and distribution of the MNPs as well as the coating.
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URCELAY OLABARRIA Irene; BARANDIARAN Jose Manuel; Thomas C. Hansen; PEREZ-PELAYO Nagore and SABOUNGI Marie-Louise. (2015). Formation of coated bcc-Fe magnetic nanoparticles. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-32-798