Size-tunable, bright, and stable PbS quantum dots: a surface chemistry study.

  title={Size-tunable, bright, and stable PbS quantum dots: a surface chemistry study.},
  author={Iwan Moreels and Yolanda Justo and Bram De Geyter and Katrien Haustraete and Jos{\'e} Carlos Martins and Zeger Hens},
  journal={ACS nano},
  volume={5 3},
PbS Qdots are synthesized using PbCl2 and elemental sulfur as precursors. The available size range is significantly expanded using tri-n-octylphosphine (TOP), enabling the synthesis of monodisperse suspensions of Qdots with a mean size varying between 3 and 10 nm. The ligand composition and dynamics are investigated with nuclear magnetic resonance (NMR) spectroscopy. We show that the Qdots are passivated solely by highly dynamic OlAm ligands, even when TOP is employed during synthesis. In this… CONTINUE READING
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