Superconducting Fullerene Nanowhiskers

被引：33

作者：

Takeya, Hiroyuki ^{[1
,2
]}

Miyazawa, Kun'ichi ^{[1
]}

Kato, Ryoei ^{[1
]}

Wakahara, Takatsugu ^{[1
]}

Ozaki, Toshinori ^{[1
,2
]}

Okazaki, Hiroyuki ^{[1
,2
]}

Yamaguchi, Takahide ^{[1
,2
]}

Takano, Yoshihiko ^{[1
,2
]}

机构：

[1] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan

[2] Japan Sci & Technol Agcy, Transformat Res Project Iron Pnictides TRIP, Chiyoda Ku, Tokyo 1020075, Japan

来源：

MOLECULES | 2012年 / 17卷 / 05期

基金：

日本学术振兴会; 日本科学技术振兴机构;

关键词：

fullerene nanowhisker; superconductor; potassium intercalation; C-60;

D O I：

10.3390/molecules17054851

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

We synthesized superconducting fullerene nanowhiskers (C(60)NWs) 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(x)C(60)NWs), 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 degrees 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(x)C(60)NWs 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.

引用

页码：4851 / 4859

页数：9

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