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Synthesis and characterization of tungsten oxide nanorods

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Abstract

Single crystalline nanorods (15–200 nm in diameter and hundreds nanometers in length) have been formed on the carbon-covered W wires by simple electric heating under a vacuum of 5 × 10-4 Pa. The chemical composition and crystalline structure of the nanorods were carefully investigated by various characterization techniques such as scanning electron microscopy, transmission electron microscopy, Raman spectroscopy, energy dispersive x-ray spectroscopy and electron energy loss spectroscopy. After ruling out any possible existence of carbon nanotubes (CNTs), tungsten carbide, W-Fe alloying, and formation of other types of tungsten oxides, monoclinic W18O49 phase has been well identified. The mechanism of nanorod formation of sub-tungsten oxide (~WO2.7 compared to WO3) will be discussed in relation to the sample preparation conditions.

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Authors and Affiliations

  1. Department of Electronics, Peking University, Beijing, 100871, People’s Republic of China

    D. Z. Guo, G. M. Zhang & Z. Q. Xue

  2. Laboratoire de Microscopies et d’Etude de Nanostructures, Université de Reims, Reims cedez 02, 51687, France

    D. Z. Guo & K. Yu-Zhang

  3. Laboratoire de Physique des Solides, Université Paris-Sud, CNRS UMR 8502, 91405, Orsay, France

    A. Gloter

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  1. D. Z. Guo
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  4. G. M. Zhang
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  5. Z. Q. Xue
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Guo, D.Z., Yu-Zhang, K., Gloter, A. et al. Synthesis and characterization of tungsten oxide nanorods. Journal of Materials Research 19, 3665–3670 (2004). https://doi.org/10.1557/JMR.2004.0469

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