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In the paper, we have constructed a very simple, sensitive and promising assay for fluorescence biosensor detection of Cu 2+ in aqueous solutions based on FRET between gold nanorods (AuNRs) and the 3'-TAMRA-labeled substrate strand (Sub) of DNAzyme. The fluorescence of the Sub is quenched when the substrate strand-DNAzyme strand (Sub-Enz) duplex is adsorbed on AuNRs surface through electrostatic...
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