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Journal of Electron Microscopy 2005 54(supplement 1):i9-i14; doi:10.1093/jmicro/54.suppl_1.i9
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© The Author 2005. Published by Oxford University Press on behalf of Japanese Society of Microscopy. All rights reserved. For permissions, please email: journals.permissions@oupjournals.org

Article

Atomic structures of multi-walled boron nitride nanohorns

Atsushi Nishiwaki and Takeo Oku*

Institute of Scientific and Industrial Research, Osaka University Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan

* To whom correspondence should be addressed. E-mail: oku{at}sanken.osaka-u.ac.jp

Abstract

Boron nitride (BN) nanohorns were synthesized by an arc-melting method, and atomic structure models for BN nanohorns with tetragonal BN rings were proposed from high-resolution electron microscopy and image calculation. Stability and electronic structures of the BN nanohorns were investigated by molecular orbital calculations, comparing with carbon nanohorns. The calculation showed that multi-walled BN nanohorns would be stabilized by the stacking of BN nanohorns. An energy gap of BN nanohorn was calculated to be 0.80 eV, which is lower compared to those of BN clusters and nanotubes.

Keywords     boron nitride, nanohorn, TEM, cluster, calculation

Received     15 October 2004, accepted 15 October 2004


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