Understanding the influence of in-plane gate electrode design on electrolyte gated transistor

Abstract

Present work investigates the influence of gate electrode design in performance of electrolyte-gated carbon nanotube transistors. Electrolyte gated transistors have a huge potential in biological and chemical sensing. Recently, in-plane gate electrode has replaced the earlier used gate electrode wire in these systems. It becomes extremely essential to investigate the impact of gate electrode design on the device properties, and to optimize the electrode design to harness maximum sensitivity and speed. As a part of this work we have investigated the impact of gate electrode area and the distance between the gate electrode and the channel on the transistor characteristics. Area of gate electrode scales almost linearly with the drain to source current. However, the dependence of the gate distance is highly affected by experimental factors. Random network of carbon nanotubes serve as the semicondutor channel for electrolyte gated field effect transistors under study.