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Herein we report a new colorimetric and fluorescent dual-mode sensor for alkaline phosphatase (ALP) activity based on the specific enzyme amplification of ALP and the unique optical properties of graphene quantum dots (GQDs)/silver nanoparticles (AgNPs) hybrid. In this strategy, ALP enabled the removal of phosphate group from ascorbic acid 2-phosphate to yield ascorbic acid. Silver ions could be attached...
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