A sensitive electrochemical DNA biosensor based on gold nanomaterial and graphene amplified signal.

Highlights: [•] An electrochemical DNA biosensor was fabricated based on sandwich sensing strategy. [•] Au NRs was incorporated in the design of electrochemical sensing platform. [•] The Au NRs decorated rGO can be obtained by electrostatic self-assemble methods. [•] The DNA biosensor shows excellent sensitivity with a detection limit of 3.5×10−17 M. [ABSTRACT FROM AUTHOR]