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以GSH(glutataione,谷胱甘肽)为稳定剂,一锅法合成水相Cd Te量子点。通过与配体巯基乙酸(TGA)量子点稳定性的对比发现:GSH@量子点对二价金属螯合剂EDTA有着更广的浓度耐受范围。利用GSH@Cd Te量子点在不同p H环境下荧光淬灭程度的不同,GSH@Cd Te量子点可作为生物传感器应用于检测溶液p H值,GSH@Cd Te量子点生物传感器检测溶液p H值的范围4到10。通过金属Cu2+离子对GSH@Cd Te量子点的作用,我们将其应用与溶液中Cu2+的检测,检测铜离子浓度最低可至0.312 5滋mol/L,上限可达10滋mol/L。
One-pot synthesis of CdTe quantum dots in water with GSH (glutathione) as stabilizer. By comparison with the quantum dot stability of the ligand thioglycolic acid (TGA), it was found that the GSH @ quantum dots have a wider range of concentration tolerance for the divalent metal chelator EDTA. Utilizing the different degree of fluorescence quenching of GSH @ Cd Te quantum dots under different p H conditions, the GSH @ Cd Te QDs can be used as biosensors for detecting p H values and GSH @ Cd Te QD biosensor detection solutions p H The range of values is 4 to 10. Through the action of metal Cu2 + ions on GSH @ Cd Te quantum dots, we detected Cu2 + in solution and detected the lowest concentration of copper ions to 0.312 5 mol / L with the upper limit of 10 mol / L.