A study of dielectrophoretically aligned gallium nitride nanowires in metal electrodes and their electrical properties

GaN Nanowire Carrier Concentration Calculated from Light and Dark Resistance Measurements

“…Capacitance-voltage measurements have recently been performed on arrays of nanowires 8 and FET measurements are widely used to extract nanowire properties. 1,2,[9][10][11][12][13][14][15][16] However, the accuracy of the nanowire FET model is still in question, 16,17 and errors of factors of ten or more are possible. Therefore, additional measurement techniques are necessary for comparison with and verification of the currently used methods.…”

Controlled dielectrophoretic nanowire self-assembly using atomic layer deposition and suspended microfabricated electrodes

“…As the field is applied, the nanowires align parallel to the direction of the field and move to the location of greatest field magnitude. In its simplest form, the time-dependent dielectrophoretic force F DEP can be written [4,5] as equation (1)…”

“…Dielectrophoresis has been successfully utilized for nanowire self-assembly on microfabricated structures, and may be scaled to wafer-level processing featuring the simultaneous, parallel assembly of nanowires on microfabricated structures. However, a better understanding is needed of factors that affect the reliability of individual nanowire assembly in scalable processes [3][4][5][6][7][8][9]. Success with dielectrophoretic assembly of individual nanowires has been achieved by use of a combination of dielectrophoresis with very narrow electrodes and a microfluidic flow cell [9], but implementation of such a flow system presents a challenge for scalable fabrication.…”

“…Success with dielectrophoretic assembly of individual nanowires has been achieved by use of a combination of dielectrophoresis with very narrow electrodes and a microfluidic flow cell [9], but implementation of such a flow system presents a challenge for scalable fabrication. Dispersion of nanowires from suspensions spread onto electrode arrays on a surface open to the atmosphere may be accomplished with less-specialized equipment [3][4][5][6][7]. However, dielectrophoretic self-assembly performed in open atmospheric environments is generally difficult to control and requires that nanowires settle in their destinations before the complete evaporation of the solvent in which they might be suspended.…”

Particle Manipulation by Miniaturised Dielectrophoretic Devices

“…Such devices have been successfully applied to trap cells 41 , bacteria 42,43 , viruses [44][45][46] , proteins 47 , DNA [48][49][50][51] and even nanostructures such as carbon nanotubes [52][53][54] , and nanowires 55,56 . Based on the 2-D DEP devices, two separation methods have been developed: (a) flow separation, and (b) DEP field-flow fractionation (FFF).…”