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Science 18 April 2003:
Vol. 300. no. 5618, pp. 467 - 469
DOI: 10.1126/science.1082346
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Reports

Packing C60 in Boron Nitride Nanotubes

W. Mickelson, S. Aloni, Wei-Qiang Han, John Cumings, A. Zettl*

We have created insulated C60 nanowire by packing C60 molecules into the interior of insulating boron nitride nanotubes (BNNTs).For small-diameter BNNTs, the wire consists of a linear chain of C60 molecules.With increasing BNNT inner diameter, unusual C60 stacking configurations are obtained (including helical, hollow core, and incommensurate) that are unknown for bulk or thin-film forms of C60.C60 in BNNTs thus presents a model system for studying the properties of dimensionally constrained "silo" crystal structures. For the linear-chain case, we have fused the C60 molecules to form a single-walled carbon nanotube inside the insulating BNNT.

Department of Physics, University of California at Berkeley, Berkeley, CA 94720, USA. Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.

* To whom correspondence should be addressed. E-mail: azettl{at}socrates.berkeley.edu

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