Preparation of aligned multi-walled BN and B/C/N nanotubular arrays and their characterization using HRTEM, EELS and energy-filtered TEM

Golberg D, Bando Y, Mitome M, Kurashima K, Sato T, Grobert N, Reyes-Reyes M, Terrones H, Terrones M

Aligned multi-walled nanotubes composed of B/C/N and/or B/N atoms were synthesized by reacting chemical-vapor-deposition-grown C nanotubes or pyrolitically grown CNx nanotubes, boron oxide and nitrogen at 1773-2200 K. We note that by increasing the reacting temperature, the overall B-N content within the tubular assemblies is also enhanced. The nanostructures were studied using high-resolution transmission electron microscopy, spatially resolved energy-filtered TEM (Omega filter) and electron energy loss spectroscopy. An oxidation-driven mechanism of B-N enrichment within the C-based tubular templates has been proposed and verified by the experimental observations. (C) 2002 Elsevier Science B.V. All rights reserved.

Keywords:

Growth

,

STABILITY

,

BXCYNZ NANOTUBES

,

CARBON NANOTUBES

,

NANOFIBERS

,

NANOSTRUCTURES

,

transmission electron microscopy

,

B-C-N

,

BORON-NITRIDE NANOTUBES

,

BC2N

,

BN

,

electron energy loss spectroscopy

,

nanotubes