Rotating Fullerene Chains in Carbon Nanopeapods

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• 作者：Jamie H. Warner ; Yasuhiro Ito ; Mujtaba Zaka ; Ling Ge ; Takao Akachi ; Haruya Okimoto ; Kyriakos Porfyrakis ; Andrew A. R. Watt ; Hisanori Shinohara ; G. Andrew D. Briggs
• 刊名：Nano Letters
• 出版年：2008
• 出版时间：August 2008
• 年：2008
• 卷：8
• 期：8
• 页码：2328-2335
• 全文大小：478K
• 年卷期：v.8,no.8(August 2008)
• ISSN：1530-6992

文摘

The rotation of fullerene chains in SWNT peapods is studied using low-voltage high resolution transmission electron microscopy. Anisotropic fullerene chain structures (i.e., C₃₀₀) are formed in situ in carbon nanopeapods via electron beam induced coalescence of individual fullerenes (i.e., C₆₀). A low electron accelerating voltage of 80 kV is used to prevent damage to the SWNT. The large asymmetric C₃₀₀ fullerene structure exhibits translational motion inside the SWNT and unique corkscrew like rotation motion. Another asymmetric fullerene chain containing mixed fullerene species is prepared by fusing smaller C₆₀ fullerenes to a larger Sc@C₈₂ fullerene, and this also exhibits corkscrew rotational motion. Chains of Sc₃C₂@C₈₀ in SWNT peapods adopt a zigzag packing structure, and the entire zigzag chain rotates inside the SWNT to induce structural modifications to the SWNT diameter and cross-sectional shape of the SWNT. The expansion and contraction of the diameter of the SWNT is measured as 17%, demonstrating nanoactuation behavior in carbon nanopeapods.