Reading neurochemical signals with integrated graphene-CMOS Researchers developed a CMOS platform that reads 32 graphene sensors in real time, enabling detailed mapping of fast, localized neurochemical activity. To fully exploit dense arrays of graphene sensors, compact electronic systems are needed to read many signals simultaneously, quickly, and reliably. Their work, published in IEEE Transactions on Circuits and Systems I: Regular Papers ("CMOS Platform for Neurochemical Detection Using 32 Graphene FETs Array at 16 kS/s per Channel"), presents an integrated system capable of reading signals from an array of 32 graphene transistors in real time, enabling detailed spatiotemporal mapping of neurochemical activity. João Piteira, group leader at INL, explains “At the core of the platform is a custom-designed CMOS chip that converts tiny currents from graphene sensors into digital signals. These experiments showed that the system can follow changes in graphene sensor signals as they happen, capturing both slow trends and fast fluctuations.