Conical Boron Nitride Nanorods Synthesized Via the Ball‐Milling and Annealing Method

Abstract

A boron nitride (BN) nanostructure, conical BN nanorod, has been synthesized in a large quantity on Si substrates for the first time via the ball‐milling and annealing method. Nitridation of milled boron carbide (B 4 C) powders was performed in nitrogen gas at 1300°C on the surface of the substrates to form the BN nanorods. The highly crystallized nanorods consist of conical BN basal layers stacked along the nanorod axis. Ball milling of the B 4 C powders can significantly enhance the nitridation of the powders and thus facilitate the formation of nanorods during the annealing process.