Abstract
The geometric design of electrodes plays a crucial role in determining the biosensor sensitivity and resolution by altering the Electric field (E). Specifically, the value of electric sensing parameters like resistance (R), capacitance (C), and impedance (Z), inherently depends on the strength of the generated electric field between electrodes. So, one must generate a large electric field for the applied AC or DC voltage. Unfortunately, the rigorous practical study on the same is limited on account of cleanroom-based fabrication techniques’ cost and time. So, it is essential to study and analyze the geometrical performance of electrodes using simulations – present work aimed at this. In this work, we specifically selected gold-interdigitated microelectrodes (IDμEs) as one of the most viable alternatives to conventional two-electrode systems based on the enhanced field strength (E) generated for the same applied voltage. Specifically, the geometric study of gold IDμEs was carried out using the COMSOL Multiphysics simulator by varying the inter-finger distance and number of fingers between the electrodes. Based on the generated electrical field strength, one can select the best design for biosensor fabrication.