Superconducting fullerene nanowhiskers.

Superconducting fullerene nanowhiskers.
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超导富勒烯纳米孔。

DOI:
10.3390/molecules17054851
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发表时间:
2012-04-26
期刊:
Molecules (Basel, Switzerland)
影响因子:
--
通讯作者:
Takano Y
Takano Y
中科院分区:
其他
文献类型:
--
作者:
Takeya H;Miyazawa K;Kato R;Wakahara T;Ozaki T;Okazaki H;Yamaguchi T;Takano Y

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采用钾(K)嵌入法合成了超导富勒烯纳米晶须(C60 NWs)。它们表现出大的超导体积分数,高达80%。在1.6 ~ 6.0范围内,KxC 60纳米晶须的超导转变温度(17 K)与K含量(x)无关,而超导体积分数随x变化。通过在200 °C下加热,在K3.3C60NW材料中观察到全屏蔽体积的最高屏蔽分数。另一方面,K掺杂的富勒烯(K-C60)晶体小于1%。我们报告了我们新合成的KxC 60纳米线的超导行为相比,KxC 60晶体,在19 K的K3 C60显示超导性。根据X射线衍射(XRD)分析,对样品的晶格结构进行了讨论。
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.
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影响因子: 4.2
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