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(a) Evolution of ultraviolet–visible (UV–vis) absorption and PL spectra of MPA-Mn2+:ZnSe d-dots with the reaction time and the UV–vis absorption and PL spectra of MPA-Mn2+:ZnSe/ZnO d-dots. TEM and HRTEM of MPA-Mn2+:ZnSe d-dots (b) and MPA-Mn2+:ZnSe/ZnO d-dots (c).
