Article (Scientific journals)
Experimental and theoretical studies suggesting the possibility of metallic boron nitride edges in porous nanourchins
Terrones, M.; Charlier, Jean-Christophe; Gloter, A. et al.
2008In Nano Letters, 8 (4), p. 1026-1032
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Keywords :
BN ribbons; ab initio modelling
Abstract :
[en] We first describe the synthesis of novel and highly porous boron nitride (BN) nanospheres (100–400 nm o.d.) that exhibit a rough surface consisting of open BN nanocones and corrugated BN ribbons. The material was produced by reacting B2O3 with nanoporous carbon spheres under nitrogen at ca. 1750 °C. The BN nanospheres were characterized using scanning electron microscopy, high-resolution electron microscopy, and electron energy loss spectroscopy. The porous BN spheres show relatively large surface areas of ca. 290 m2/g and exhibit surprisingly stable field emission properties at low turn-on voltages (e.g., 1–1.3 V/µm). We attribute these outstanding electron emission properties to the presence of finite BN ribbons located at the surface of the nanospheres (exhibiting zigzag edges), which behave like metals as confirmed by first-principles calculations. In addition, our ab initio theoretical results indicate that the work function associated to these zigzag BN ribbons is 1.3 eV lower when compared with BN-bulk material.
Disciplines :
Physics
Author, co-author :
Terrones, M.
Charlier, Jean-Christophe;  Université Catholique de Louvain - UCL
Gloter, A.
Cruz-Silva, E.
Terres, E.
Li, Y. B.
Vinu, A.
Zanolli, Zeila ;  Université Catholique de Louvain - UCL
Dominguez, J. M.
Terrones, H.
Bando, Y.
Golberg, D.
Language :
English
Title :
Experimental and theoretical studies suggesting the possibility of metallic boron nitride edges in porous nanourchins
Publication date :
2008
Journal title :
Nano Letters
ISSN :
1530-6984
eISSN :
1530-6992
Publisher :
American Chemical Society, Washington, United States - District of Columbia
Volume :
8
Issue :
4
Pages :
1026-1032
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 28 October 2011

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