How chemistry affects the ion beam synthesis of PbS nanocrystals
Résumé
Solid state chemical reactions involving the multiple oxidation states of sulfur are shown to dominate the synthesis of PbS nanocrystals in pure silica via co-implantation and annealing. The formation of PbSO4 as well as PbS nanocrystals and small amorphous clusters is evidenced, and related to atomic transport occurring during annealing. A mechanism is proposed.