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. 2017 Aug 18;17(8):1910. doi: 10.3390/s17081910

Figure 2.

Figure 2

(A) Scheme of antibody immobilization and design of the SPE for rapid immunosensing of S. Typhimurium using electrochemical impedance spectroscopy (with permission of [53]); (B) mechanism and construction of the impedimetric immunosensor based on the use of magnetic beads for separation and rapid detection of E. coli O157:H7 and S. Typhimurium in foods (with permission of [54]); (C) scheme of the electrode platform based on label-free as-grown double wall carbon nanotubes bundles for S. Typhimurium immunoassay (with permission of [55]); and (D) schematic processes of the immunosensor fabrication process: (a) dropping of PAMAM-MWCNT-Chit membrane; (b) assembly of AuNPs; (c) assembly of mercaptoacetic acid; (d) activation of carboxyl groups with EDC/NHS; (e) capture of anti-Salmonella antibodies; and (f) immunoreaction of anti-Salmonella and Salmonella cells (with permission of [56]).