Abstract
ZnO and (Zn,Mg)O nanowires were grown by catalyst-assisted molecular-beam epitaxy (MBE) on silicon substrates. The magnesium doping was achieved by simultaneous use of a Zn- and a Mg-source in the MBE chamber. SEM- and TEM-studies of the nanowires showed that the catalyst particle is often found on the tip of the nanowire consistent with a vapor-liquid-solid growth mechanism. HRTEM images and SAD patterns show that the pure ZnO nanowires are single-crystal. The growth direction is [0001] of the hexagonal ZnO structure. Analysis of (Zn,Mg)O nonorods showed that the Mg distribution was not homogenous throughout the rod, but a core/shell radial heterostructure was found. HRTEM, HAADF, SAD and dark-field imaging showed that the core of the nanowires consisted of hexagonal ZnO with a low amount of Mg in solid solution, while the shell consisted of (Mg,Zn)O in the cubic rocksalt structure.
| Original language | English |
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| Pages | 540-551 |
| Number of pages | 12 |
| State | Published - 2004 |
| Event | State-of-the-Art Program on Compound Semiconductors XLI and Nitride and Wide Bandgap Semiconductors for Sensors, Photonics, and Electronics V - Proceedings of the International Symposia - Honolulu, HI, United States Duration: 3 Oct 2004 → 8 Oct 2004 |
Conference
| Conference | State-of-the-Art Program on Compound Semiconductors XLI and Nitride and Wide Bandgap Semiconductors for Sensors, Photonics, and Electronics V - Proceedings of the International Symposia |
|---|---|
| Country/Territory | United States |
| City | Honolulu, HI |
| Period | 3/10/04 → 8/10/04 |