Reconfigurable Positioning of Vertically-Oriented Nanowires Around Topographical Features in an AC Electric Field.

摘要: We report the effect of topographical features on gold nanowire assemblies in a vertically applied AC electric field. Nanowires 300 nm diameter ×2.5 μm long, and coated with ∼30 silica shell, were assembled aqueous solution between top bottom electrodes, where electrode was patterned cylindrical dielectric posts. Assemblies monitored real time using optical microscopy. Dielectrophoretic electrohydrodynamic forces manipulated through frequency voltage variation, organizing nanowires parallel to field lines, i.e., standing perpendicular substrate surface. Field gradients around posts simulated assembly behavior experimentally evaluated as function feature spacing. The gradient highest these topographic features, which resulted accumulation oriented post perimeters when dielectrophoresis dominated (high frequency) or whe...