Bailey S W D, Amanatidis I, Lambert C J
Department of Physics, Lancaster University, Lancaster LA1 4YB, United Kingdom.
Phys Rev Lett. 2008 Jun 27;100(25):256802. doi: 10.1103/PhysRevLett.100.256802. Epub 2008 Jun 24.
We propose a new drive mechanism for carbon nanotube (CNT) motors, based upon the torque generated by a flux of electrons passing through a chiral nanotube. The structure of interest comprises a double-walled CNT formed from, for example, an achiral outer tube encompassing a chiral inner tube. Through a detailed analysis of electrons passing through such a "windmill," we find that the current, due to a potential difference applied to the outer CNT, generates sufficient torque to overcome the static and dynamic frictional forces that exist between the inner and outer walls, thereby causing the inner tube to rotate.
我们基于电子通量通过手性纳米管产生的扭矩，提出了一种用于碳纳米管（CNT）电机的新型驱动机制。感兴趣的结构包括一个双壁碳纳米管，例如由一个包围手性内管的非手性外管形成。通过对电子穿过这种“风车”的详细分析，我们发现，由于施加在外层碳纳米管上的电势差，电流产生了足够的扭矩来克服内外壁之间存在的静摩擦力和动摩擦力，从而使内管旋转。
