Atomically resolved mechanical response of individual metallofullerene molecules confined inside carbon nanotubes
Atomically resolved mechanical response of individual metallofullerene molecules confined inside carbon nanotubes
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DOI：
10.1038/nnano.2008.126
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发表时间：
2008-06-01
影响因子：
38.3
通讯作者：
Wiesendanger, Roland
中科院分区：
文献类型：
--
作者：
Ashino, Makoto;Obergfell, Dirk;Wiesendanger, Roland
碳纳米管 (1) 内的中空核心可用于限制单个分子 (2,3)，现在可以对纳米管内此类分子的运动进行成像 (4,5)。然而，迄今为止，尽管实验和理论证据表明纳米管内部可能存在几乎无摩擦的运动，但迄今为止还无法控制这种运动，也无法检测移动分子的力(6-13)。在这里，我们报告了对限制在单壁碳纳米管内的单个金属富勒烯分子 (Dy@C-82) 对动态模式下操作的原子力显微镜尖端原子的机械响应的精确测量 (14,15)。使用具有原子分辨率的三维力图(16)，我们从纳米管外部定位分子，并通过以三维、原子级分辨率同时检测吸引力和能量损失来测量它们的弹性和非弹性行为。
The hollow core inside a carbon nanotube(1) can be used to confine single molecules(2,3) and it is now possible to image the movement of such molecules inside nanotubes(4,5). To date, however, it has not been possible to control this motion, nor to detect the forces moving the molecules, despite experimental and theoretical evidence suggesting that almost friction-free motion might be possible inside the nanotubes(6-13). Here, we report on precise measurements of the mechanical responses of individual metallofullerene molecules (Dy@C-82) confined inside single-walled carbon nanotubes to the atom at the tip of an atomic force microscope operated in dynamic mode(14,15). Using three-dimensional force mapping with atomic resolution(16), we addressed the molecules from the exterior of the nanotube and measured their elastic and inelastic behaviour by simultaneously detecting the attractive forces and energy losses with three-dimensional, atomic-scale resolution.