The long term goal of this project is to synthesize a flexible graphene film to act as an electrode for a capacitive pressure transducer. This project was commissioned by Dwyer Instruments, Inc. to replace the silicon electrode in their miniature capacitive displacement pressure transducer. Replacing silicon with graphene should yield a pressure transducer that more accurately measures low pressures and has a larger dynamic range. The first step of this project is to convert graphite to graphite oxide (GO) using permanganate and hydrogen peroxide oxidation. The resulting GO powder has been characterized using x-ray diffraction and infrared spectroscopy. Several methods are being explored to reduce the GO to form a flexible graphene-containing film. One potential method is to soak sheets of paper in an aqueous GO solution, allow the water to evaporate, and then reduce the GO by heating the film in a 250 °C oven.
Goyne, Arthur; Goyne, Thomas; and Zhang, Di, "Fabrication of Flexible Graphene Films for Capacitive Displacement Pressure Transducer" (2020). Summer Interdisciplinary Research Symposium. 83.