Dihydrolipoic acid coated alloyed quantum dots

摘要

Alloyed quantum dots (QDs) are the popular material for the fabrication of the light-emitting diodes because of their optical parameters advantages. One of the most interesting features peculiar to this QDs class is the ability to controlled size-independent emission peak tuning via compound amounts changing. The same advantages can be valuable in bioanalytical methods and sensor systems development. Facile one-pot synthesis of the bright quaternary alloyed QDs made by Cd_xZn_(1-x)Se_yS_(1-y)/ZnS semiconductor composition with narrow (FWHM < 26 nm) emission peak (548 nm) and photoluminescence quantum yield (PLQY) up to 50% was described. Obtained QDs were stabilized in water by the dihydrolipoic acid (DHLA) ligand exchange approach with insignificant PLQY loss relative initial (16%) and great colloidal stability period (6 months). This article summarizes the easiest ways of the alloyed QDs synthesis and subsequent hydrophilization for the potential simplification of their large-amounts manufacturing procedure.