SEARCH

SEARCH BY CITATION

Keywords:

  • cation-exchange reactions;
  • Cu2S nanowires;
  • MnS;
  • nanojunctions;
  • TEM

Abstract

Cu2S nanowires and MnS/Cu2S junctions have been derived on the basis of γ-MnS nanowires via cation-exchange reaction. Relationships between a selective cation exchange and the growth direction of the γ-MnS nanowires are identified by means of transmission electron microscopy. In the case of γ-MnS nanowires with [0001] growth direction, Cu+ exchange with an initial γ-MnS nanowire results in a Cu2S nanowire. In contrast, for γ-MnS nanowires with [1–100] growth direction, Cu+ exchange leads to a striped MnS/Cu2S junction. Mechanisms for this selective cation exchange are proposed.