Journal
SOLID STATE COMMUNICATIONS
Volume 116, Issue 1, Pages 1-6Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0038-1098(00)00281-7
Keywords
boron nitride nanotube; chemical synthesis; transmission electron microscopy; electron energy loss spectroscopy
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Ropes consisting of tens of multi-walled boron nitride (BN) nanotubes and extending up to several mu m were synthesized through a chemical reaction involving chemical-vapor-deposited multi-walled carbon (C) nanotube oxidation by B2O3 mixed with either MoO3 or V2O5 in a flowing N-2 atmosphere. The ropes were analyzed by high-resolution transmission electron microscopy (HRTEM) and electron energy loss spectroscopy (EELS). Tubular shells of BN in the ropes were preferentially assembled in a zigzag form with the [<10(1)over bar 0>] direction parallel to the tube/rope axis. Oxidation-induced C nanotube opening at the tip and at wall defects, followed by substitution of C atoms with B and N atoms, and consecutive crystallization of BN shells on the seed nanotubes is thought to underlie the formation mechanism. (C) 2000 Elsevier Science Ltd. All rights reserved.
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