Abstract
Large-scale synthesis of high quality PbSe nanocrystals was conducted with the one-pot method. By this “greener” synthesis route, the use of traditional dangerous pyrophoric trioctylphosphine (TOP) and tributylphosphine (TBP) reagents was avoided. The crystal size and shape were controlled by the reaction time, reaction temperature, and the use of different combinations of surfactants. X-ray diffraction (XRD) and transition electron microscopy (TEM) were used to characterize as-synthesized nanocrystals and demonstrated the rock salt cubic structures and narrow size distributions. More than 3 g of high quality PbSe nanocrystals were synthesized in one reaction by this large-scale one-pot method. The uniform size of as-synthesized nanocrystals promoted the self-assembly of PbSe nanocrystals into large-area ordered superstructures.
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