Size Selective Precipitation of CdSe Colloidal Quantum Dots

Cadmium Selenide (CdSe) nanoparticles were synthesized through the colloidal chemistry approach. Dynamic light scattering experiments (DLS) have been performed in CdSe aqueous dispersions in order to determine the nanoparticle hydrodynamic radii. The DLS data together with photoluminescence (PL) measurements allowed for size analyses throughout the synthetic and post‐preparative procedures. We report here a study of size‐selective precipitation (SSP). DLS technique provided fast results, yielding values for the hydrodynamic radii in several size separation steps. Efficiency of the SSP procedure could thus be estimated.