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Synthesis and properties of Mo and W ions co-doped porous nano-structured VO2 films by sol–gel process

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Abstract

Porous nano-structured vanadium dioxide (VO2) films doped with Mo and W ions had been synthesized by sol gel process by employing a sol containing ammonium molybdate and ammonium tungstate with the addition of cetyltrimethyl ammonium bromide (CTAB). The effects of molybdenum and tungsten co-doping and CTAB addition on the structure, morphologies, crystalline and optical properties of VO2 films were investigated systematically in this study. The composition and microstructure were detected by X-ray diffraction, X-ray photoelectron spectroscopy and scanning electron microscopy. The Mo and W ions co-doped porous nano-structured VO2 films showed excellent infrared transmittance (nearly 70 %), large transmittance difference (55 %) before and after the phase transition, low transition temperature (35 °C), wide hysteresis width (22 °C) and fast phase transition. The results suggest that such Mo and W ions co-doped porous nano-structured VO2 film is an ideal fundamental material for optical data storage.

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Acknowledgments

This work was financially supported by the National Science Foundation of China (Grant Nos. 61072036) and SRF for SEM. We would also thank Analytical and Testing center of Sichuan University for their XRD analysis.

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Correspondence to Wanxia Huang.

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Xu, Y., Huang, W., Shi, Q. et al. Synthesis and properties of Mo and W ions co-doped porous nano-structured VO2 films by sol–gel process. J Sol-Gel Sci Technol 64, 493–499 (2012). https://doi.org/10.1007/s10971-012-2881-9

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Keywords

  • Mo and W ions co-doped
  • Vanadium dioxide
  • Sol–gel process
  • Porous film
  • Optical properties