Portable High-Accuracy Wireless Acquisition System for Graphene-Based Sensors

Graphene field-effect transistors (gFETs) are gaining popularity for the realization of biological sensors as their graphene active area provides a convenient basis attaching organic substances, such appropriately engineered receptors. The presence particular agent then translates in modification electrical characteristics gFET. We thus developed compact, portable system that is able to accurately measure said with high accuracy, by automatically compensating its own offsets and errors. acquisition device we here present drain currents nominal accuracy 0.1 % an RMS noise low 22 pA, up maximum 125 µA (22 bits effective resolution), gFET channel resistances 0.01 ± Ω 2.13 µV range from 100 1 MΩ. Due performance, small dimensions, long battery life, it can be used both scientific research, where portability ease use key features when operating potentially hazardous environments due agents, fully-automated detector coupled appropriate sensor, perform thousands measures on single charge completely remotely controlled over Bluetooth energy (BLE) connection.