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ISRN Nanotechnology
Volume 2012 (2012), Article ID 871208, 4 pages
http://dx.doi.org/10.5402/2012/871208
Research Article

Synthesis of Cobalt-Encapsulated Carbon Nanocapsules Using Cobalt-Doped Fullerene Nanowhiskers

1Institute of Materials Science, Graduate School of Pure and Applied Sciences, University of Tsukuba, Ibaraki Tsukuba, 305-8753, Japan
2Fullerene Engineering Group, Advanced Materials Processing Unit, National Institute for Materials Science, Namiki, Ibaraki Tsukuba, 305-0044, Japan

Received 24 December 2011; Accepted 11 January 2012

Academic Editors: C. S. Casari and Y. Song

Copyright © 2012 Daisuke Matsuura et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We synthesized cobalt- (Co-) doped C60 nanowhiskers (NWs) by applying a liquid-liquid interfacial precipitation method using a C60-saturated toluene solution and 2-propanol with Co nitrate hexahydrate (Co(NO3)3⋅6H2O). Heating the NWs at 873–1173 K produced carbon nanocapsules (CNCs) that encapsulated Co clusters with a hexagonal-closed-packed structure. After heating at 1273 K, the encapsulated Co clusters in CNCs were transformed into orthorhombic Co2C clusters. It was found that Co- and Co2C-encapsulated CNCs can be produced by varying heating temperature.