Gold nanoparticles (AuNPs) are known for their high surface area to volume ratio, which acts as an excellent receptor when placed in between electrodes in sensor applications. Microelectrodes with bar and needle-shaped pointed ends in two configurations, comb and castle wall, were designed to be used for the fabrication of electrodes to observe the relation between the geometry of electrodes and the dielectrophoretic behaviour of AuNPs on p-gallium nitride (p-GaN) substrates. The electrical properties were analyzed before and after the drop cast of AuNPs using current-voltage (I-V) curve method with manual probing. Resistance values of each sample were calculated under reverse bias condition. The effect of the design configurations of the electrodes on the nanomanipulation of AuNPs will be discussed.
