Dynamics of Paramagnetic Metallofullerenes in Carbon Nanotube Peapods

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• 作者：Jamie H. Warner ; Andrew A. R. Watt ; Ling Ge ; Kyriakos Porfyrakis ; Takao Akachi ; Haruya Okimoto ; Yasuhiro Ito ; Arzhang Ardavan ; Barbara Montanari ; John H. Jefferson ; Nicholas M. Harrison ; Hisanori Shin
• 刊名：Nano Letters
• 出版年：2008
• 出版时间：April 2008
• 年：2008
• 卷：8
• 期：4
• 页码：1005 - 1010
• 全文大小：1482K
• 年卷期：v.8,no.4(April 2008)
• ISSN：1530-6992

文摘

We filled SWNTs with the paramagnetic fullerene Sc@C₈₂ to form peapods. The interfullerene 1D packing distance measured using TEM is d = 1.1 ± 0.02 nm. The Sc@C₈₂ in SWNT peapods continuously rotated during the 2 s TEM exposure time, and we did not see the Sc atoms. However, Sc@C₈₂ metallofullerenes in MWNT peapods have periods of fixed orientation, indicated by the brief observation of Sc atoms. La@C₈₂ peapods were also prepared and their rotational behavior examined. The interfullerene 1D packing of both La@C₈₂ and Sc@C₈₂ peapods is identical and thus independent of the charge transfer state for these paramagnetic fullerenes. The La@C₈₂ metallofullerenes in the peapods have fixed orientations for extended periods of time, up to 50 s in some cases. The La@C₈₂ spontaneously rotates rapidly between fixed orientations.