Room Temperature Printed Ethanol Sensor Based on P-Phenylenediamine Functionalized Graphene Oxide

In this letter, an ethanol sensor operating at room temperature is fabricated utilizing graphene oxide functionalized with p-phenylenediamine as the sensing channel and printed silver nanoparticle film as the electrodes over a glass substrate. The electrodes are developed using a rapid and cost-effective microcantilever-based printing technology. The fabricated sensor is exposed to varying concentrations of volatile organic compounds, such as acetone, isopropanol, and ethanol, to analyze its response and selectivity. The sensor shows high selectivity and a sensitivity of 33% toward five parts per million ethanol.