Fabrication of magnetic nanoparticles using RAPET technique with or without employing external magnetic field

The present article introduces the newly developed "RAPET" [reactions under autogenic pressure at elevated temperatures] technique for the fabrication of magnetic nanoparticles with or without employing external high magnetic field (10 T). The experimental setups of RAPET, efficacy to synthesize ferromagnetic, paramagnetic, superparamagnetic, superconducting nanomaterials, and their surface interactions (core-shell structures) as well as obtained properties are demonstrated. The metallic magnetic nanoparticles are chemically highly active and easily get oxidized in air, resulting in loss of magnetism, while RAPET-produced carbon-coated magnetic nanoparticles are stable against corrosion. RAPET is a simple, one-stage, efficient, economic, scalable approach for the fabrication of a variety of nanomaterials. This process may be of great interest in the near future because of our preliminary understanding of the process, its control, and mechanistic elucidation, being a first step in its technological advancement.