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- 저자 : Sneddon, Larry G. (검색결과 1 건)
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Chatterjee, Shahana,Kim, Myung Jong,Zakharov, Dmitri N.,Kim, Seung Min,Stach, Eric A.,Maruyama, Benji,Sneddon, Larry G. American Chemical Society 2012 Chemistry of materials Vol.24 No.15
<P>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 (B<SUB>3</SUB>N<SUB>3</SUB>H<SUB>6</SUB>) or the polyhedral-borane decaborane (B<SUB>10</SUB>H<SUB>14</SUB>) 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.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/cmatex/2012/cmatex.2012.24.issue-15/cm3006088/production/images/medium/cm-2012-006088_0009.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/cm3006088'>ACS Electronic Supporting Info</A></P>
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