Ultrasensitive Fe3+ Ion Detection Based on Carbon Quantum Dot-Functionalized Solution-Gated Graphene Transistors

摘要： An ultrasensitive real-time Fe3+ ion sensor based on carbon quantum dot (CQD)-functionalized solution-gated graphene transistors (SGGTs) is designed. Special functional groups are designed to modify the surface of CQDs, which allows the device to have ultra-high sensitivity and excellent selectivity. More importantly, the components of the sensor except the gate electrode can be repeatedly used.