Acoustoelectronic Effect in Semiconductor Quantum Dots with a Multilayer Shell

Ultrasound is an effective method of targeted delivery of drugs using quantum dots and removal of quantum dots from the human body. Ultrasound improves drug delivery using quantum dots, but affects their energy structure. In this work, a model of the spherical quantum dot of the core/shell type and the bionanocomplex based on it, exposed to the influence of an acoustic wave, is developed on the basis of the electron-deformation coupling method. Within the framework of this model, the influence of acousto-electron effects on the modulation of the radiation energy of the CdSe quantum dot with different shell structure was investigated. The influence of ultrasound on the energy spectrum of the charge carriers of the CdSe/ZnS/CdS/ZnS quantum dot—human serum albumin bionanocomplex was investigated. It is shown that the ultrasonic wave leads to a decrease in the ground state energy of electron and hole and a decrease in the band gap width of quantum dot. The regularities of change in the radiation energy of the CdSe QDs with different shell structures under the influence of ultrasound depending on the surface concentration of human serum albumin have been established.