Figure 5

Absorbance spectra of the Ch-Mn3O4 in presence of acidic buffer (pH4.2) with and without TMB (substrate) is shown in figure (a). The reaction kinetics of the oxidation of TMB (0.5 mM-4 mM) by the nanoparticle have been shown at 374 nm and 662 nm (inset) in figure (b) and the corresponding Lineweaver Burk (LB) plots are depicted in figure (c) and (d).