Contacting single bundles of carbon nanotubes with alternating electric   fields
  Single bundles of carbon nanotubes have been selectively deposited from suspensions onto sub-micron electrodes with alternating electric fields. We explore the resulting contacts using several solvents and delineate the differences between Au and Ag as electrode materials. Alignment of the bundles between electrodes occurs at frequencies above 1 kHz. Control over the number of trapped bundles is achieved by choosing an electrode material which interacts strongly with the chemical functional groups of the carbon nanotubes, with superior contacts being formed with Ag electrodes. 
R. Krupke, F. Hennrich, H. B. Weber, D. Beckmann, O. Hampe, S. Malik,   M. M. Kappes, H. v. L\"ohneysen