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(A) Schematic of fabrication process of luminol/AgBr/3DNGH-based ECL E. coli biosensor. (B) ECL responses of BSA/aptamer/GA/CHIT/luminol/AgBr/3DNGH/GCE in 0.1 M PBS (pH 8) with different concentrations of E. coli. (C) Calibration curve for E. coli detection. (D) EIS of GA/CHIT/luminol/AgBr/3DNGH/GCE (a), BSA/aptamer/GA/CHIT/luminol/AgBr/3DNGH/GCE nanocomposites before (b) and after (c) E. coli reaction. Adapted with permission [94]; copyright 2017, Elsevier Ltd.
