A water-gate organic field-effect transistor

Abstract

Figure Equotion Present High-dielectric-constant insulators, organic monolayers, and electrolytes have been successfully used to generate organic field-effect transistors operating at low voltages. Here, we report on a device gated with pure water. By replacing the gate dielectric by a simple water droplet, we produce a transistor that entirely operates in the field-effect mode of operation at voltages lower than 1V. This result creates opportunities for sensor applications using water-gated devices as transducing medium. © 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.