Abstract
Catalyst‐free metal–organic chemical vapor deposition (MOCVD) is used to prepare ZnO nanoneedles, grown vertically on Si substrates. Electron microscopy reveals that the nanoneedles are sharp, have uniform diameters, lengths, and densities, and high crystallinity. The photoluminescence spectrum displays a strong emission peak at 3.29 eV with a very weak deep‐level emission, indicating that the nanoneedles are of high optical quality.
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