Syntheses of Boron Nitride Nanotubes from Borazine and Decaborane Molecular Precursors by Catalytic Chemical Vapor Deposition with a Floating Nickel Catalyst

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• 作者：Shahana Chatterjee ; Myung Jong Kim ; Dmitri N. Zakharov ; Seung Min Kim ; Eric A. Stach ; Benji Maruyama ; Larry G. Sneddon
• 刊名：Chemistry of Materials
• 出版年：2012
• 出版时间：August 14, 2012
• 年：2012
• 卷：24
• 期：15
• 页码：2872-2879
• 全文大小：478K
• 年卷期：v.24,no.15(August 14, 2012)
• ISSN：1520-5002

文摘

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 掳C from borazine were mainly double-walled, with lengths up to 0.2 渭m and 2 nm diameters. The BNNTs grown at 1200鈥?300 掳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鈥? nm inner diameters and 12鈥?4 nm outer diameters. BNNTs grown from decaborane at 1300 掳C were longer, averaging 0.6 渭m, whereas those grown at 1200 掳C had average lengths of 0.2 渭m. 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.

Keywords:

boron nitride nanotubes; chemical vapor deposition; nickel; borazine; decaborane; floating catalyst