A Novel and Disposable Enzyme-Labeled Amperometric Immunosensor Based on MWCNT Fibers for Listeria monocytogenes Detection

Figure 2

Cyclic voltammograms of the different modified electrodes in 0.1 M pH 7.4 PBS containing 1.0 mM thionine, 0.5 mM H₂O₂, and 0.1 M NaCl at room temperature; scan rate, 100 mv/s. (a) Bare-MWCNT fibers electrode. (b) HRP-anti-L. monocytogenes labeled immunoelectrode. (c) H₂O₂ combined with immunoelectrode. (d) Immunoelectrode incubated with L. monocytogenes at 37°C, 30 min.