Rotating fullerene chains in carbon nanopeapods.
Rotating fullerene chains in carbon nanopeapods.
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DOI：
10.1021/nl801149z
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发表时间：
2008-07
期刊：
影响因子：
10.8
通讯作者：
J. Warner;Yasuhiro Ito;Mujtaba Zaka;Ling Ge;T. Akachi;H. Okimoto;Kyriakos Porfyrakis;A. Watt;
中科院分区：
文献类型：
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作者：
J. Warner;Yasuhiro Ito;Mujtaba Zaka;Ling Ge;T. Akachi;H. Okimoto;Kyriakos Porfyrakis;A. Watt;
利用低电压高分辨透射电子显微镜研究了富勒烯链在单壁碳纳米管豆荚中的旋转。各向异性富勒烯链结构（即，C300）通过电子束诱导的单个富勒烯的聚结（即，C60）。使用80 kV的低电子加速电压来防止对SWNT的损坏。大的不对称C300富勒烯结构表现出平移运动内的单壁碳纳米管和独特的螺旋状旋转运动。另一种含有混合富勒烯物种的不对称富勒烯链是通过将较小的C60富勒烯融合到较大的Sc@C82富勒烯来制备的，并且这也表现出螺旋形旋转运动。单壁碳纳米管豆荚中的Sc3C2@C80链采用锯齿形堆积结构，整个锯齿形链在单壁碳纳米管内部旋转，从而诱导单壁碳纳米管直径和横截面形状的结构修饰。单壁碳纳米管直径的膨胀和收缩被测量为17%，证明了碳纳米胶囊中的纳米致动行为。
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.