Магнитные свойства суперпарамагнитных наночастиц переходных металлов в углеродных нанооболочках

Abstract

We have demonstrated a simple, scalable, and low-cost method of producing superparamagnetic nanoparticles (SPNs) encapsulated in carbon nanocages (CNCs). It was found that using a facile method of simple annealing of the precursor of Ni, Co or Fe (acetates) mixed with citric acid, one can synthesize respective nanoparticles encapsulated in CNCs with sizes ranging from 5 to 7 nm and superparamagnetic behavior for Ni and Co and from 10 to 100 nm and ferromagnetic behavior for Fe.