Synthesis of Boron Nitride Nanotubes from Borazine and Decaborane Molecular Precursors by Catalytic Chemical Vapor Deposition with a Floating Nickel Catalyst
- Synthesis of Boron Nitride Nanotubes from Borazine and Decaborane Molecular Precursors by Catalytic Chemical Vapor Deposition with a Floating Nickel Catalyst
- Shahana Chatterjee; 김명종; Dmitri N. Zakharov; Seung Min Kim; Eric A. Stach; Benji Maruyama; Larry Sneddon
- Boron Nitride Nanotubes; Borazine; Chemical Vapor Deposition; Ni Catalyst; Decaborane; nickel; floating catalyst
- Issue Date
- Chemistry of materials
- VOL 24, NO 15, 2872-2879
- Multi- and double-walled boron nitride nanotubes (BNNTs) have been synthesized with the aid of a floating nickel catalyst via the catalytic chemical vapor deposition (CCVD) of either the amine-borane borazine (B3N3H6) or the polyhedral-borane decaborane (B10H14) molecular precursors in ammonia atmospheres. Both sets of BNNTs were crystalline with highly ordered structures. The BNNTs grown at 1200 °C from borazine were mainly double-walled, with lengths up to 0.2 μm and ~2 nm diameters. The BNNTs grown at 1200–1300 °C from decaborane were double- and multiwalled, with the double-walled nanotubes having ~2 nm inner diameters and the multiwalled nanotubes (10 walls) having ~4–5 nm inner diameters and ~12–14 nm outer diameters. BNNTs grown from decaborane at 1300 °C were longer, averaging ~0.6 μm, whereas those grown at 1200 °C had average lengths of ~0.2 μm. The BNNTs were characterized using scanning and transmission electron microscopies (SEM and TEM), and electron energy loss spectroscopy (EELS). The floating catalyst method provides a catalytic and potentially scalable route to BNNTs with low defect density from safe and commercially available precursor compounds.
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