Dong Lixin, Tao Xinyong, Hamdi Mustapha, Zhang Li, Zhang Xiaobin, Ferreira Antoine, Nelson Bradley J
Institute of Robotics and Intelligent Systems, ETH Zurich, CH-8092 Zurich, Switzerland.
Nano Lett. 2009 Jan;9(1):210-4. doi: 10.1021/nl8027747.
We report an experimental and theoretical investigation into mass transport between individual carbon nanotubes (CNTs) via their central cores. These CNT fluidic junctions can serve as basic elements for more complex nanofluidic systems and can also provide a structure for testing theories of fluid flow at the nanoscale. Controlled melting, evaporation, and flowing of copper and tin within and between nanotube shells are investigated experimentally. Cap-to-wall and wall-to-cap mass flow are realized by electric current driven heating, diffusion, and electromigration under low bias voltages between 1.5 and 1.8 V. A comparison shows that the mass loss for the cap-to-wall architecture is much smaller than that for the wall-to-cap junction. A molecular dynamics simulation is presented that provides further insight into the transport mechanism.
我们报告了一项关于通过单个碳纳米管（CNT）中心芯进行质量传输的实验和理论研究。这些碳纳米管流体连接可以作为更复杂的纳米流体系统的基本元件，还可以提供一个用于测试纳米尺度流体流动理论的结构。通过实验研究了铜和锡在纳米管壳内及之间的受控熔化、蒸发和流动。在1.5至1.8 V的低偏置电压下，通过电流驱动的加热、扩散和电迁移实现了帽到壁和壁到帽的质量流。比较表明，帽到壁结构的质量损失远小于壁到帽连接的质量损失。本文还给出了分子动力学模拟，进一步深入了解了传输机制。
