Fluorescent aptasensor for ofloxacin detection based on the aggregation of gold nanoparticles and its effect on quenching the fluorescence of Rhodamine B.

本文提出一种基于无标记氧氟沙星特异性适配体、金纳米颗粒(AuNPs)和罗丹明B(RB)的荧光生物传感器，用于水样和牛奶中氧氟沙星(OFL)的定量检测。在无OFL时，OFL适配体通过范德华力包覆AuNPs表面，使其在高浓度NaCl中保持分散；分散AuNPs可通过荧光共振能量转移(FRET)有效猝灭RB的强荧光。当存在OFL时，OFL与...