A non-enzymatic electrochemical immunoassay for quantitative detection of Escherichia coli O157:H7 using Au@Pt and graphene

Schematic illustration of (A) the process for preparation of Fe3O4@SiO2-Ab1, (B) the process for preparation of rGO-NR-Au@Pt-Ab2, and (C) the detection process of the immunoassay.183