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An electrochemical aptasensor for detection of prostate-specific antigen using reduced graphene gold nano composite and Cu/ carbon quantum dotsAn electrochemical aptasensor for detection of prostate-specific antigen using reduced graphene gold nano composite and Cu/ carbon quantum dots

We report a label-free electrochemical aptamer-based biosensor for the detection of human prostate-specific antigen (PSA). The thiolate DNA aptamer towards PSA was conjugated to the diminished graphene oxide/Au (RGO-Au) nanocomposite