Superconducting fullerene nanowhiskers

Hiroyuki Takeya, Kunichi Miyazawa, Ryoei Kato, Takatsugu Wakahara, Toshinori Ozaki, Hiroyuki Okazaki, Takahide Yamaguchi, Yoshihiko Takano

    Research output: Contribution to journalArticlepeer-review

    32 Citations (Scopus)


    We synthesized superconducting fullerene nanowhiskers (C 60NWs) 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 C 60 nanowhiskers (K xC 60NWs), while the superconducting volume fractions changed with x. The highest shielding fraction of a full shielding volume was observed in the material of K 3.3C 60NW by heating at 200 °C. On the other hand, that of a K-doped fullerene (K-C 60) crystal was less than 1%. We report the superconducting behaviors of our newly synthesized K xC 60NWs in comparison to those of K xC 60 crystals, which show superconductivity at 19 K in K 3C 60. The lattice structures are also discussed, based on the x-ray diffraction (XRD) analyses.

    Original languageEnglish
    Pages (from-to)4851-4859
    Number of pages9
    Issue number5
    Publication statusPublished - 2012 May


    • Fullerene nanowhisker
    • Potassium intercalation
    • Superconductor

    ASJC Scopus subject areas

    • Analytical Chemistry
    • Chemistry (miscellaneous)
    • Molecular Medicine
    • Pharmaceutical Science
    • Drug Discovery
    • Physical and Theoretical Chemistry
    • Organic Chemistry


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