Formation and frequency response of two-dimensional nanowire lattices in an applied electric field.

摘要: Ordered two-dimensional (2D) lattices were formed by assembling silica-coated solid and segmented Au nanowires between coplanar electrodes using alternating current (ac) electric fields. Dielectrophoretic forces from the ac field concentrated wires electrodes, with their long axis aligned parallel to lines. After reaching a sufficient particle density, field-induced dipolar interactions resulted in assembly of dense 2D that spanned distance at least ten wire lengths. The ends neighboring or segments overlapped fraction length form lattice structures “running bond” brickwork-like pattern. observed tunable three distinct ways: (1) segmentation pattern, which fixed periodicity for given condition; (2) frequency, varied real time; (3) switching on/off, converted smectic organizations...