โ Scribed by B.R. Scharifker; J. Mostany; A. Serruya
No coin nor oath required. For personal study only.
Interactions among growing nuclei diminish the nucleation rate, giving rise to saturation nuclear number densities and introducting correlations in their location on the elwtrode surface. These have been investigated considering the existence of nucleation exclusion zones around each nucleus, with radii r, growing with the age u of nuclei according to laws of the type r, = ku", with 0 d x < co. From digital simulations of the process, the nearest-neighbour distributions corresponding to the cases of x = 0, 4, 1 or cc were obtained and compared with expressions available for x = cc and x = 0. The results show that the propagation rates of the exclusion zones can be obtained from microscopic studies of the electrode surfaces in single-step potentiostatic experiments. It is also shown that the analysis of spatial distributions of nuclei on the surface also provides additional criteria for the identification of nucleation rate laws.
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