Superconducting fullerene nanowhiskers

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

doi:10.3390/molecules17054851

Superconducting fullerene nanowhiskers

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

Research output: Contribution to journal › Article › peer-review

25 Citations (Scopus)

Abstract

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 language	English
Pages (from-to)	4851-4859
Number of pages	9
Journal	Molecules
Volume	17
Issue number	5
DOIs	https://doi.org/10.3390/molecules17054851
Publication status	Published - 2012 May

Keywords

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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title = "Superconducting fullerene nanowhiskers",

abstract = "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.",

keywords = "Fullerene nanowhisker, Potassium intercalation, Superconductor",

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

year = "2012",

month = may,

doi = "10.3390/molecules17054851",

language = "English",

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T1 - Superconducting fullerene nanowhiskers

AU - Takeya, Hiroyuki

AU - Miyazawa, Kunichi

AU - Kato, Ryoei

AU - Wakahara, Takatsugu

AU - Ozaki, Toshinori

AU - Okazaki, Hiroyuki

AU - Yamaguchi, Takahide

AU - Takano, Yoshihiko

PY - 2012/5

Y1 - 2012/5

N2 - 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.

AB - 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.

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