碳纳米管受介电泳作用三维运动仿真

利用溶于介电液中的碳纳米管在外加交变电场作用下极化产生介电泳力和液体粘滞阻力的共同作用,建立了碳纳米管受力和运动模型;对碳纳米管的运动过程进行了仿真,得到了碳纳米管从特定初始点开始的三维运动轨迹和可以实现组装的碳纳米管初始点分布区域.计算了碳纳米管运动过程中所受介电泳力和速度的变化规律,距离电极间隙越近,碳纳米管受力和速度越大,最大分别能达到10^-9 N和10⁵μm/s的数量级.仿真结果为碳纳米管介电电泳组装提供指导.

Three-dimensional simulation of kinetics of carbon nanotubes under dielectrophoresis

Based on the dielectrophoretic force arising from the polarization of carbon nanotubes (CNTs) in the dielectric fluid under an alternating current electric field and the viscous resistance from the fluid, force and motion models for CNTs under dielectrophoresis (DEP) are established. Simulation is conducted on the translational and rotational motion of CNTs. Three-dimensional trajectories and a distribution region of initial points from where a CNT can be successfully assembled onto the electrode gap are obtained. By calculating the DEP force and translational velocity of a CNT during assembly, we know that the nearer the CNT to the electrode gap, the greater the DEP force and CNT velocity, and that the maximal DEP force and CNT velocity can be respectively of orders 10^-9N and 10^{5μm/s. The results of simulation provide guidance for DEP assembly of CNTs.}