Abstract
Self-assembled roselike ZnO nanostructures were synthesized via thermal evaporation of zinc powders without catalytic assistance at the relatively low temperature of 550 °C. The roselike structures consist of a large number of ZnO nanorods that uniformly arrange into hexagonal multilayers. The spontaneous nanoindentation effects under geometric constraints can be used to explain the structures. The cathodoluminescence spectra show a wide visible emission band related to Zn interstitials and oxygen vacancies. Field emission measurements demonstrate that the roselike ZnO nanostructures possess good electron emission characteristics with a turn-on field of 4.3 V/μm. © 2008 Springer-Verlag.
| Original language | English |
|---|---|
| Pages (from-to) | 247-250 |
| Journal | Applied Physics A: Materials Science and Processing |
| Volume | 91 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - May 2008 |
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