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In this study, direct detection of fluazinam was realized using a fluorescent sensor using disulfide quantum dots (MoS2 QDs) via inner filter effect (IFE). The maximum excitation of as-prepared MoS2 QDs presented a complementary spectral-overlap with the maximum absorption of fluazinam. Thus the occurrence of inner filter effect led to the significant fluorescence quenching of MoS2 QDs. Additionally, fluorescent quenching efficiency of MoS2 QDs could be enhanced by the effects of π-π stacking, hydrogen bond and electrostatic interaction
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