Zinc Oxide Nanostructures and Their Core−Shell Luminescence Properties

Abstract

Two ZnO nanostructures with multisegment structure have been synthesized by a chemical vapor deposition (CVD) method on a silicon substrate. The top size of the nanostructures can reduce to 10-30 nm, which is beneficial to field emission applications. Scanning and transmission electron microscope methods are applied to analyze the morphology and microstructure of the nanostructures. Cathodoluminescence study shows that the ZnO nanostructures have core-shell luminescent structure that will affect significantly the mechanical and electrical properties of the ZnO nanostructures.