In the framework of the modified for 3D-system and for surface (2D-system) of the Lifshitz-Slezov-Wagner theory, a comparison of the theoretically calculated size distribution with the experimental histograms of CdSe quantum dots was performed. Agreement of experimental histograms with theoretically calculated curves testifies the possibility of coarsening of quantum dots simultaneously by two mechanisms - diffusion and kinetics of transition to the interface of phases.
A comparison between the generalized Chakraverty-Wagner and Lifshits-Slyozov-Wagner distributions with experimental histograms for Pt, Pd –nanocrystals and their compounds has been performed according to the modified LSW theory applied to the surface (2D) and bulk (3D) systems. Pt and Pd nanocrystals were synthesized and deposited from vapor phase and a liquid solution. Good correlation between the experimental histograms and the theoretical curves proves that two mechanisms of the nanocrystals’ growth (dissolution) can be involved simultaneously during the Ostwald ripening stage. One of them is controlled by diffusion, while the chemical reaction rate controls the other mechanism. Details of comparison between the experimental histograms and theoretical curves prove that growth of Pt and Pd -nanoparticles is controlled mainly by the chemical reaction rate (i.e. Wagner’s mechanism) regardless of the synthesis method in the process of Ostwald ripening.
Within the framework of the modified Lifshitz-Slyozov-Wagner theory, we study the mechanisms and kinetics of formation of ZnO nanocrystals from oversaturated solution accounting the dependence of optoelectronic properties of semiconductor on crystal size. It is shown that the size distribution function can be described by the generalized Lifshitz- Slyozov-Wagner function corresponding to growing ZnO nanocrystals governed in parallel by two mechanisms, viz. the diffusion and the Wagner’s ones. Comparison of experimentally obtained data with theoretically computed ones represented as the size distribution functions and the temporal dependences of the mean sizes of ZnO nanocrystals enables to estimate the constants of the rate of growth of them at the stage of the Ostwald’s ripening. We also propose the way for estimating the magnitude of the specific surface energy at the nanocrystal-liquid interface.