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Synthesis and Characterization of Fullerene Nanowhiskers by Liquid-Liquid Interfacial Precipitation: Influence of C60 Solubility
Molecules 2012, 17(5), 4851-4859; doi:10.3390/molecules17054851
Article

Superconducting Fullerene Nanowhiskers

1,2,* , 1, 1, 1, 1,2, 1,2, 1,2 and 1,2
Received: 31 March 2012 / Revised: 12 April 2012 / Accepted: 18 April 2012 / Published: 26 April 2012
(This article belongs to the Special Issue Fullerene Chemistry)
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Abstract

We synthesized superconducting fullerene nanowhiskers (C60NWs) by potassium (K) intercalation. They showed large superconducting volume fractions, as high as 80%. The superconducting transition temperature at 17 K was independent of the K content (x) in the range between 1.6 and 6.0 in K-doped C60 nanowhiskers (KxC60NWs), while the superconducting volume fractions changed with x. The highest shielding fraction of a full shielding volume was observed in the material of K3.3C60NW by heating at 200 °C. On the other hand, that of a K-doped fullerene (K-C60) crystal was less than 1%. We report the superconducting behaviors of our newly synthesized KxC60NWs in comparison to those of KxC60 crystals, which show superconductivity at 19 K in K3C60. The lattice structures are also discussed, based on the x-ray diffraction (XRD) analyses.
Keywords: fullerene nanowhisker; superconductor; potassium intercalation fullerene nanowhisker; superconductor; potassium intercalation
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.

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Takeya, H.; Miyazawa, K.; Kato, R.; Wakahara, T.; Ozaki, T.; Okazaki, H.; Yamaguchi, T.; Takano, Y. Superconducting Fullerene Nanowhiskers. Molecules 2012, 17, 4851-4859.

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