Journal
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
Volume 6, Issue 3, Pages 787-790Publisher
AMER SCIENTIFIC PUBLISHERS
DOI: 10.1166/jnn.2006.086
Keywords
ZnO nanostructures; crystal growth; vapor-solid mechanism; field emission; property
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By simply controlling atmosphere, rods, tetraleg-rods, and arrays of ZnO nanostructures have been fabricated respectively through pure zinc powder evaporation without catalyst at temperature of 650 similar to 700 degrees C. Investigations through HRTEM and XRD showed that the growth of the synthesized ZnO nanostructures was controlled by vapor-solid mechanism. Field emission measurements revealed that all of the structures, owing to their very low turn-on voltage, sufficient emission current and proper linearity of 1/V similar to Ln(I/V-2), are likely to be potential candidates as a field emitter. The results also indicated that field emission properties are relative to morphology and size of the tips of ZnO nanostructures, and the nanorods with sharp tips possess the first-class FE property.
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