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Chemical synthesis and characterization of boron/boron nitride core–shell nanostructures

Published online by Cambridge University Press:  31 January 2011

K. F. Huo ,
Z. Hu ,
J. J. Fu ,
H. Xu ,
X. Z. Wang ,
Y. Chen ,
Y. N. Lü ,
B. H. Liu  and
J. Ding
K. F. Huo
Affiliation:
Key Lab for Mesoscopic Materials Science and Jiangsu Province Lab of Nanotechnology, Department of Chemistry, Nanjing University, Nanjing 210093, People's Republic of China
Z. Hu
Affiliation:
Key Lab for Mesoscopic Materials Science and Jiangsu Province Lab of Nanotechnology, Department of Chemistry, Nanjing University, Nanjing 210093, People's Republic of China
J. J. Fu
Affiliation:
Key Lab for Mesoscopic Materials Science and Jiangsu Province Lab of Nanotechnology, Department of Chemistry, Nanjing University, Nanjing 210093, People's Republic of China
H. Xu
Affiliation:
Key Lab for Mesoscopic Materials Science and Jiangsu Province Lab of Nanotechnology, Department of Chemistry, Nanjing University, Nanjing 210093, People's Republic of China
X. Z. Wang
Affiliation:
Key Lab for Mesoscopic Materials Science and Jiangsu Province Lab of Nanotechnology, Department of Chemistry, Nanjing University, Nanjing 210093, People's Republic of China
Y. Chen
Affiliation:
Key Lab for Mesoscopic Materials Science and Jiangsu Province Lab of Nanotechnology, Department of Chemistry, Nanjing University, Nanjing 210093, People's Republic of China
Y. N. Lü
Affiliation:
College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, People's Republic of China
B. H. Liu
Affiliation:
Department of Materials Science, The National University of Singapore, Singapore 119260
J. Ding
Affiliation:
Department of Materials Science, The National University of Singapore, Singapore 119260
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Abstract

A moderate chemical method [i.e., the reaction of diborane (B2H6) and a mixture gas of ammonia and nitrogen (NH3/N2) over nanoscale iron boride at 1100 °C] was developed to explore the boron nitride (BN) nanostructures. The products were well characterized by high-resolution electron microscopy and energy-dispersive x-ray spectroscopy. Two types of novel core–shell nanocapsules of amorphous boron core encapsulated in crystalline boron nitride shell were obtained. The first one looked like a peanut with an amorphous B core containing a trace of BN crystallites, a transition layer of BN nanofibers and amorphous B, and a thornlike shell of BN nanofibers. The second one looked like a perfect sphere consisting of a pure amorphous B core and a rather smooth crystalline BN shell. These results not only provided us a new chemical method for preparing BN nanostructures but also enriched the important BN nanostructures family. A growth mechanism is also briefly discussed.

Type
Articles
Information
Journal of Materials Research , Volume 18 , Issue 7 , July 2003 , pp. 1641 - 1645
Copyright
Copyright © Materials Research Society 2003

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