Graphene sensors stay stable in liquids, boosting sensitivity up to 20 times

Accurately measuring small shifts in biological markers, like proteins and neurotransmitters, or harmful chemicals in the water supply, can identify critical problems before they have a chance to impact patients or the environment. While some existing sensors can monitor the microscopic matter behind these issues, they often have limitations. A primary example is a device known as a field-effect transistor—a tiny component that controls the flow of electrical current in a system—that struggles to remain stable when exposed to liquid.