The effect of diffusion upon the formation of self-assembled quantum dots was studied. Two types of diffusion were observed during the growth of a layer. The occurrence of surface diffusion was confirmed by means of atomic force microscopy. The occurrence of interdiffusion was verified by photoluminescence and X-ray diffraction measurements. It was suggested that the surface diffusion might help to form quantum dots. However, interdiffusion might prevent the formation of quantum dots.

The Effect of Diffusion on Formation of Self-Assembled CdSe Quantum Dots. Y.Yang, D.Z.Shen, J.Y.Zhang, X.W.Fan, Z.H.Zhen, X.W.Zhao, D.X.Zhao, Y.N.Liu: Journal of Crystal Growth, 2001, 225[2-4], 431-4