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Keywords:

  • core/shell materials;
  • germanium;
  • nanostructures;
  • nanowires;
  • silicon
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The layer-by-layer formation and characterization of conformally smooth, uniform, and single-crystalline Ge(core)/Si–Ge–Si(multishell) and Si(core)/Ge–Si(multishell) nanowire heterostructures is reported. The modulation of their radial composition is well-defined and there is precise control over a wide range of shell thicknesses regardless of the initial nanowire core diameter.