Selective Facet Reactivity During Cation Exchange in Cadmium Sulfide Nanorods

摘要: The partial transformation of ionic nanocrystals through cation exchange has been used to synthesize nanocrystal heterostructures. We demonstrate that the selectivity for take place at different facets plays an important role in determining resulting morphology binary heterostructure. In case copper(I) (Cu+) cadmium sulfide (CdS) nanorods, reaction starts preferentially ends nanorods such copper (Cu2S) grows inward from either end. is very striped pattern obtained our previous studies silver(I) (Ag+) CdS where nonselective nucleation silver (Ag2S) occurs (Robinson, R. D.; Sadtler, B.; Demchenko, D. O.; Erdonmez, C. K.; Wang, L.-W.; Alivisatos, A. P. Science 2007, 317, 355−358). From interface formation energies calculated several models epitaxial connections between and Cu2S or Ag2S, we infer relative stab...