实验发现纳米金(AuNPs)能有效地猝灭碳点(CDs)的荧光.考察了CDs质量浓度、pH值、反应温度和时间等多种因素对荧光猝灭的影响,在最佳实验条件下猝灭常数为9.1×108 L/mol.此外,加入猝灭剂AuNPs前后CDs的荧光寿命基本不变;且随温度升高,猝灭常数减小.因此,推测AuNPs对CDs的荧光猝灭为静态猝灭. It was found that gold nanoparticles (AuNPs) can effectively quench the fluorescence of carbon dots (CDs), and the effects of various factors such as mass concentration of CDs, pH value, reaction temperature and time on the fluorescence quenching were investigated. Under the optimal experimental conditions And the quenching constant was 9.1 × 108 L / mol. In addition, the fluorescence lifetime of CDs before and after the addition of quenching agent AuNPs remained basically unchanged, and the quenching constant decreased with the increase of temperature, so we speculated that the fluorescence quenching of CDs by AuNPs was Static quenching.