Laboratoire de Nanostructures et Nouveaux Materiaux Electroniques, Ecole Polytechnique Federale de Lausanne, CH-1015 Lausanne, Switzerland.
ACS Nano. 2010 Jan 26;4(1):279-84. doi: 10.1021/nn901559q.
We demonstrate the ability to precisely control the deposition of a defined number of carbon nanotubes (CNTs) from solution onto microfabricated electrodes using dielectrophoresis. The solvation shell around the CNTs, exhibiting a high dielectric constant which is possibly larger than the intrinsic dielectric constant of CNTs, is found to play a crucial role in electrophoretic processes. Substrate resistivity is also very important: The spatial repartition of the electric field between the substrate and the microelectrodes leads to deviations from the precise location of the CNTs. A recipe is given for the dielectrophoresis of CNTs which can be extended to other nanowires or nanotubes.
我们展示了使用介电泳精确控制从溶液中沉积一定数量的碳纳米管 (CNT) 的能力。发现 CNT 周围的溶剂化壳具有高介电常数，其可能大于 CNT 的固有介电常数，在电泳过程中起着至关重要的作用。基底电阻率也非常重要：基底和微电极之间的电场的空间分布导致 CNT 位置的偏离。给出了用于 CNT 介电泳的配方，该配方可扩展到其他纳米线或纳米管。
