In this work, we prepared CdTe quantum dots, and series of Cd~(1-x)Mn~(x)Te-alloyed quantum dots with narrow size distribution by an ion-exchange reaction in water solution. We found that the photoluminescence peaks are shifted to higher energies with the increasing Mn_(2+)content. So far, this is the first report of blue-emitting CdTe-based quantum dots. By means of cyclic voltammetry, we detected features of electrochemical activity of manganese energy levels formed inside the Cd~(1-x)Mn~(x)Te-alloyed quantum dot band gap. This allowed us to estimate their energy position. We also demonstrate paramagnetic behavior for Cd~(1-x)Mn~(x)Te-alloyed quantum dots which confirmed the successful ion-exchange reaction.
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