MoS₂ quantum dots as a specific fluorescence sensor for selection of rutin and for temperature sensing

A selective and sensitive method for detecting rutin using MoS₂ quantum dots (QDs) as a fluorescent probe is reported in the paper, a one-step hydrothermal synthesis method was used to prepare MoS₂ QDs. The synthesized MoS₂ QDs had good stability and water solubility, and the fluorescence of MoS₂ QDs was quenched by rutin due to the inner filter effect. There was a good linear relationship between the intensity of MoS₂ QDs and rutin concentration ranging from 5.0 × 10^-7 to 3.2 × 10^-5 mol/L with a detection limit of 3.5 × 10^-7 mol/L. MoS₂ QDs showed temperature-dependent fluorescence that had an excellent linear relationship between 20 and 80°C. Therefore MoS₂ QDs can be used as specific fluorescence sensors for selection of rutin and for temperature sensing.