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Ultra-fast Microwave Synthesis of ZnO Nanowires and their Dynamic Response Toward Hydrogen Gas

Author(s): Qurashi Ahsanulhaq | Tabet N | Faiz M | Yamzaki Toshinari

Journal: Nanoscale Research Letters
ISSN 1931-7573

Volume: 4;
Issue: 8;
Start page: 948;
Date: 2009;
Original page

Keywords: ZnO | Microwave synthesis | Nanowires | FESEM | TEM | XPES | H2gas sensor

Abstract Ultra-fast and large-quantity (grams) synthesis of one-dimensional ZnO nanowires has been carried out by a novel microwave-assisted method. High purity Zinc (Zn) metal was used as source material and placed on microwave absorber. The evaporation/oxidation process occurs under exposure to microwave in less than 100 s. Field effect scanning electron microscopy analysis reveals the formation of high aspect-ratio and high density ZnO nanowires with diameter ranging from 70 to 80 nm. Comprehensive structural analysis showed that these ZnO nanowires are single crystal in nature with excellent crystal quality. The gas sensor made of these ZnO nanowires exhibited excellent sensitivity, fast response, and good reproducibility. Furthermore, the method can be extended for the synthesis of other oxide nanowires that will be the building block of future nanoscale devices.

Tango Jona
Tangokurs Rapperswil-Jona

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