Field Emission from V2O5·nH2O Nanorod Arrays

J. Phys. Chem. C, 112 (7), 2262 -2265, 2008. 10.1021/jp0766151 S1932-7447(07)06615-0
Web Release Date: January 26, 2008

Field Emission from V₂O₅·nH₂O Nanorod Arrays

Wen Chen,* Chiwei Zhou, Liqiang Mai, Yueli Liu, Yanyuan Qi, and Ying Dai

State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, and Institute of Materials Science and Engineering, Wuhan University of Technology, Wuhan, 430070, China

Received: August 17, 2007

In Final Form: December 3, 2007

Abstract:

Hydrated vanadium pentoxide (V₂O₅·nH₂O) nanorod arrays with diameters of ~200 nm and lengths of more than 5 m have been synthesized via template-based physical wetting of V₂O₅ sols. The V₂O₅·nH₂O nanorod arrays were characterized by scanning electron microscopy, X-ray diffraction, and high-resolution transmission electron microscopy. Field-emission (FE) measurements on the V₂O₅·nH₂O nanorod arrays show low turn-on voltages of 6-8 V/m and linear Fowler-Nordheim behaviors. The morphologies and natures of the V₂O₅·nH₂O samples are assumed to cause such good FE performances.

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