Electrical characterization of surface modified IDE with Gold Nano particles

Abstract

Interdigitated Electrode (IDE) is a sensor device that composed of the fingers of the electrode and two pads made up of high conductivity of the metal. IDE is prepared by simple photolithographic process that included transferred of the desired design pattern to the Silicon Oxide (SiO) substrate. 130nm nanogap of IDE is used for this experiment. This paper is conducted to compare the bare IDE without anything deposited on it and IDE with Gold Nanoparticles (GNP) on it. The result showed the difference by IDE deposited GNP slightly decreased with 1.76×10-11. The size of the nanogap also played an important role for sensitivity of the device. Thus, in the future, this device should have been made to detect any kind of biomolecules such as DNA, proteins or antibodies.