Abstract
Heterostructured metal−semiconductor Zn−ZnO core−shell nanobelts and nanotubes have been synthesized. The core is a belt-shaped Zn single crystal, and the shell is an epitaxially grown ZnO layer of ∼5 nm in thickness. The composite nanobelt grows along [21̄1̄0], its top/bottom being ±(0001), and side surfaces ±(011̄0). The Zn core is a single crystal, and the ZnO shell has an epitaxial orientation relationship with the core. The metal-based nanobelts have a distinct morphology from the nanowires reported in the literature. A growth mechanism is proposed on the basis of growth kinetics and thermodynamics. Sublimation of the Zn core results in the formation ZnO nanotubes.
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