Abstract
Abstract A large quantity of boron nitride (BN) nanocapsules with cobalt nanoparticles were fabricated by nitridation of boron and cobalt nanoparticles with a H2/NH3 gas mixture. High-resolution electron microscopy showed that cobalt nanoparticles were encapsulated by boron nitride layers with thickness of ∼5 nm. Magnetization and photoluminescence measurements of the BN nanocapsules showed ferromagnetism and luminescence at 3.8 eV, which would be due to separation of Co nanoparticles by the BN layers. The present work indicates that the nitridation of boron particles with catalytic metal is a useful fabrication method for mass production of BN nanocapsules at low temperatures compared to the ordinary arc discharge method.
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