Open Access Nano Perspectives

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

Ahsanulhaq Qurashi1*, N Tabet2, M Faiz2 and Toshinari Yamzaki1

Author affiliations

1 Department of Engineering, Toyama University, 3190 Gofuku, Toyama, 930-8555, Japan

2 Surface Science Laboratory, Department of Physics, and Center of Research Excellence in Nanotechnology, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia

For all author emails, please log on.

Citation and License

Nanoscale Research Letters 2009, 4:948-954  doi:10.1007/s11671-009-9317-7

Published: 25 April 2009

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.

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