Micrometer-Scale Translation and Monitoring of Individual Nanocars on Glass
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- 作者：Saumyakanti Khatua ; Jason M. Guerrero ; Kevin Claytor ; Guillaume Vives ; Anatoly B. Kolomeisky ; James M. Tour ; Stephan Link
- 刊名：ACS Nano
- 出版年：2009
- 出版时间：February 24, 2009
- 年：2009
- 卷：3
- 期：2
- 页码：351-356
- 全文大小：331K
- 年卷期：0
- ISSN：1936-086X
文摘
Nanomachines designed to exhibit controlled mechanical motions on the molecular scale present new possibilities of building novel functional materials. Single molecule fluorescence imaging of dye-labeled nanocars on a glass surface at room temperature showed a coupled translational and rotational motion of these nanoscale machines with an activation energy of 42 ± 5 kJ/mol. The 3 nm-long dye-labeled carborane-wheeled nanocars moved by as much as 2.5 μm with an average speed of 4.1 nm/s. Translation of the nanocars due a wheel-like rolling mechanism is proposed and this is consistent with the absence of movement for a three-wheeled nanocar analogue and the stationary behavior of unbound dye molecules. These findings are an important first step toward the rational design and ultimate control of surface-operational molecular machines.