Synthesis and characterization of one-dimensional heterojunction B-C-N nanostructures

摘要

Chemical vapor deposition (CVD) processes have been employed to synthesize hollow BxCyNz nanotubes and nanocablesrnfilled with metal iron cores. The structure and composition of the products were characterized by scanning electronrnmicroscopy (SEM), high-resolution transmission electron microscopy (TEM), and electron energy-loss spectroscopy (EELS).rnThe detailed analysis of the chemical composition in the axial and radial direction in an individual nanotube or nanocable, asrnwell as morphological variation, was presented. The observations indicate the B/N doping to carbon species and completernphase separation in B-C-N system. Thus, it is predicted that the precise control of the experimental conditions may eventuallyrnlead to a rational synthesis of various one-dimensional hetero-junction BCN structures.