Growth and optical properties of single-crystal tubular ZnO whiskers

The growth of single-crystal tubular ZnO whiskers was achieved via a process of first reduction and following oxidation of ZnS powders. The products were characterized using x-ray powder diffraction, scanning electron microscopy, transmission electron microscopy, and photoluminescence spectroscopy....

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Veröffentlicht in:Applied physics letters 2003-03, Vol.82 (9), p.1401-1403
Hauptverfasser: Hu, J. Q., Bando, Y.
Format: Artikel
Sprache:eng
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Zusammenfassung:The growth of single-crystal tubular ZnO whiskers was achieved via a process of first reduction and following oxidation of ZnS powders. The products were characterized using x-ray powder diffraction, scanning electron microscopy, transmission electron microscopy, and photoluminescence spectroscopy. The whiskers are tubular single crystals with the [001] growth crystallographic direction, and most have outer diameters of ∼400 nm, lengths of up to 15 μm, and wall thickness range of 100–150 nm. Room-temperature photoluminescence spectrum of the whiskers reveals a strong and sharp UV emission band at 381 nm and a weak and broad green emission band at 583 nm. Possible growth mechanism of the ZnO whiskers was briefly discussed.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.1558899