The influence of hydrostatic pressure on the synthesis of colloidal core-shell quantum dots with the mismatch of lattice parameters

The theory of the synthesis of colloidal quantum dots of the core-shell type with the mismatch of lattice parameters of the contacting materials which are subjected to additional external hydrostatic pressure has been developed. The proposed model takes into account the influence of hydrostatic pressure on the homogeneous nucleation of the shell material and its heteroepitaxial growth on the core surface. Within the framework of the developed model, the regularities of change in the homogeneous nucleation of colloidal ZnS nanoparticles, that is the material of the shell, and the heteroepitaxial growth of the ZnS shell on the CdSe core under the action of external pressure have been established. It was found that such hydrostatic pressure complicates the homogeneous formation of nanoparticles of the shell material (increases the critical radius, at exceeding which the growth of nanoparticles and the potential barrier for their nucleation are possible) and, on the contrary, practically does not change the conditions of heteroepitaxial growth of the shell on the core.