A feasible C-rich DNA electrochemical biosensor based on Fe3O4@3D-GO for sensitive and selective detection of Ag+

Three-dimensional graphene oxide (3D-GO) was decorated with ferroferric oxide nanoparticles (Fe3O4) to form nanocomposites of Fe3O4@3D-GO, which were further used as electrode materials in an electrochemical DNA sensor for detecting silver ions (Ag+). The developed electrochemical biosensor based on Fe3O4@3D-GO exhibits highly selectivity, good repeatability, and stability for detecting Ag+ ions.