High-Sensitive Sensor of Dopamine Based on Photoluminescence Quenching of Hierarchical CdS Spherical Aggregates

Figure 4

A linear relation between the PL intensity and DA concentration, with different volume ratio of tetrachlorethylene to ethanol: (a) 4 : 1, (b) 1 : 4, (c) 1 : 50, and (d) CdS colloidal solution without ethanol.