Electrochemical sensor for detection of dopamine and tyrosine using CdS–C quantum dots modified electrode

The current study focuses on employing CdS–C quantum dots on a glassy carbon electrode to design and fabricate a sensor with good sensitivity and selectivity for the detection of tyrosine and dopamine using a drop casting method. The hybrid CdS–C quantum dots were created using a simple microwave method which exhibited good porosity and crystallinity. SEM, TEM, XRD and pore size distribution methods were used to characterize the quantum dots produced. The newly developed electrode evaluated for sensing dopamine and tyrosine by using various electrochemical characterization techniques. The detection limit of dopamine has been determined to be 46 nM. Dopamine and tyrosine electrochemical detection indicated good selectivity and sensitivity. Graphical abstract