we replace them by an average curve, which contains main features ofthe inhibition mechanism. The obtained two general curves of ZnO andCuO nanoparticles were used for the model analysis. The spatial propagationof the active species was calculated according to the Fick's law[53] with the diffusion coefficients of ions DCu≈1.2·10−5 cm2/s [54]and DZn≈1.1·10−5 cm2/s [5]. The diffusion coefficients of the CuOand ZnO nanoparticles of size 2R=3 nm at room temperatureDNP=1.63·10−6 cm2/s was estimated from the Stokes-Einstein equation,supported by autocorrelation curves (ACF) measurements of thesimilar size nanoparticles using DLS method [6]. The maximal concentrationof active species Cmax attained at the inhibition radius δduring the Brownian random walk propagation is given in