Abstract
Single-walled carbon nanotubes (SWNTs) have been precisely aligned and positioned in device architectures using ac dielectrophoresis by patterning floating metal posts or strips within the electrode gaps. These structures perturb the electric field, causing local enhancements in the field intensity, as seen in simulation, that guide the nanotubes along a predictable path in given directions, in zigzag patterns, or as single or a sequence of tubes along a series of posts. This method enables the assembly of SWNTs in complex multi-electrode geometries, when specifying the electrode voltages is not sufficient to direct the desired assembly. The device characteristics of the dielectrophoretically-aligned SWNTs are discussed.
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