Dielectrophoretic assembly of carbon nanotubes and stability analysis

Nanoscale dimensions and remarkable properties of carbon nanotubes make them promising building blocks for nanoelectronics.One requirement is the need to manipulate single or multiple carbon nanotubes to bridge electronic conductors.In this paper,multi-walled carbon nanotubes with a variety of sizes are assembled onto electrodes using alternative current electric felds by dielectrophoresis.The effect of the dielectrophoretic parameters and the nanotube size as well as the length uniformity on the assembly is experimentally investigated.Current–voltage characteristics of assembled carbon nanotubes are measured.The experimental results showed that both the dielectrophoretic parameters and length uniformity of carbon nanotubes have an infuence on the stability of assembly results.Choosing uniform carbon nanotubes with an appropriate length and suffcient stiffness,which are more controllable by dielectrophoresis,is necessary for an assembly of a small number of carbon nanotubes.     

微米及纳米级微粒的分离与操控研究进展

随着微/纳米技术的发展,寻求一种微/纳米粒子有效的分离操控技术是实现其应用的关键.本文综述了微/纳米级微粒分离操控的几种常用技术,并且着重介绍了介电泳的基本理论以及它在微/纳米级微粒分离操控的研究进展及其应用前景.