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- W2969834585 abstract "We devise a novel colorimetric aptasensor for multiplex antibiotics based on an ss-DNA fragment coordinately controlling gold nanoparticles (AuNPs) aggregation. The multifunctional aptamer (Apt) was elaborately designed to be adsorbed on AuNPs surfaces acting as a binding element for antibiotics and a molecular switch. Chloramphenicol (CAP) and tetracycline (TET) were selected as the model antibiotics. When one kind of antibiotics was added, the specifically recognized fragment of Apt can bind to it and dissociated, and the non-specific one coordinately controls AuNPs aggregation under high-salt conditions. Hence, different color changes of AuNPs solution can be used as the signal readout. The aptasensor exhibited remarkable selectivity and sensitivity for separate detection of TET and CAP, and the detection limits are estimated to be 32.9 and 7.0 nM, respectively. The analysis with the absorption spectroscopy and the smartphone are applied to detect antibiotics in real samples with consistent results and desirable recoveries." @default.
- W2969834585 created "2019-08-29" @default.
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- W2969834585 date "2020-01-01" @default.
- W2969834585 modified "2023-10-09" @default.
- W2969834585 title "A label-free colorimetric aptasensor based on controllable aggregation of AuNPs for the detection of multiplex antibiotics" @default.
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- W2969834585 doi "https://doi.org/10.1016/j.foodchem.2019.125377" @default.
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