Deformation-diffusion effects in CdSe-core – ZnS/CdS/ZnS-multilayer shell quantum dots for their biomedical applications

The researches of the spatial redistribution of defects of interstitial Cd in the CdSe quantum dot with a shell and the quantum dot – human serum albumin bionanocomplexes were carried out. On the basis of the developed deformation-diffusion model, the method of "deformation-diffusion retraction" is proposed, which will limit the migration of cadmium beyond the QD boundaries and significantly reduce their toxicity for living organisms. It was established that the introduction of a neutral impurity into the quantum dot, which creates stretching deformation, leads to a decrease in the concentration of interstitial Cdi on the QD surface.