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| - Solid-Phase Synthesis of Carbon-Encapsulated Magnetic Nanoparticles
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| - Carbon-encapsulated magnetic nanoparticles (CEMNPs) have wide applications. However, synthesis of suchparticles with superparamagnetic properties is still a great challenge. The present study reports a new methodfor the production of CEMNPs in the solid state. An Fe/C solid solution was first prepared by pyrolysis ofFe(CO)5 and C2H2. Heat treatment of this material at low temperatures (≤600 °C) generated fine nanoparticles(∼7 nm) with superparamagnetic properties, but treatment at high temperatures (>600 °C) produced largernanoparticles (≥30 nm) exhibiting permanent magnetic behavior. The advantages of the present solid-phaseapproach over previous gas-phase methods include good controllability of particle size and thus magneticproperties and suitability for large-scale production.
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