**5. Influence of form of nanoclusters in heterostructures on the size distribution function**

Obtaining the heterostructures containing quantum dots of specified concentration, form, sizes and homogeneity is connected with considerable experimental difficulties. However, if even such structure has been obtained, its properties can change under the Ostwald's ripening. For that, as it has been shown above, the character of the size distribution function of clusters changes not only as a result of transition from one growth mechanism to another one, but also due to simultaneous action of such mechanisms (Sagalovich & Slyozov, 1987; Vengrenovich *et al*., 2006а, 2007a, 2008а, 2008b). Below we represent the results of investigation of the influence of cluster form on the size distribution function in semiconductor heterosystems with quantum dots. A heterosystem is considered as island film consisting of disk-like islands of cylindrical form, with height *h* (Fig. 14).

Fig. 14. Disc-like cluster of radius r and constant height h
