Effect of the process conditions on the structural and magnetic properties of gamma-Fe_2O_3 nanoparticles produced by laser pyrolysis

摘要

Pure and uniform gamma-Fe_2O_3 nanoparticles between 4 and 7 nm, have been prepared by a continuous process based on ethylene sensitised laser pyrolysis of iron pentacarbonyl vapours in an oxidant atmosphere. In this paper the effect of the laser power and oxygen proportion on the properties of the maghemite nanoparticles has been investigated.