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Preparation and phase transition properties of Ti-doped VO2 films by sol–gel process

  • Original Paper: Functional coatings, thin films and membranes (including deposition techniques)
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Abstract

Pure and Ti-doped vanadium dioxide (VO2) thin films were deposited on muscovite substrates using an inorganic sol–gel method. The crystallinity, stoichiometry, surface morphology and phase transition properties of the films were investigated using X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscope and in situ FTIR measurement, respectively. The results indicated that all the VO2 films exhibited polycrystalline structure, with a (011) preferred orientation. But Ti doping affected the morphology of the films remarkably, which then led to varied phase transition properties. Particularly, the phase transition temperature elevated by increasing the doping concentration of Ti (from 61 °C for pure film to 71.5 °C for the film doped with 2.8 at.% Ti), and the hysteresis loop decreased simultaneously. This study proposed a new method to prepare Ti-doped VO2 film and provided considerable insights for the application of Ti-doped VO2 film due to its unique phase transition properties.

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Acknowledgments

This work was financially supported by the National Natural Science Foundation of China (Grants 61271075, 11404226) and the Joint Research Fund from Sichuan University and China Academy of Engineering Physics. We thank the Analytical & Testing Center of Sichuan University for the XRD analysis.

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Authors and Affiliations

  1. College of Materials Science and Engineering, Sichuan University, Chengdu, 610064, Sichuan, People’s Republic of China

    Yanyan Hu, Qiwu Shi, Wanxia Huang, Hongfu Zhu, Fang Yue, Yang Xiao & Shan Liang

  2. College of Physical Science and Technology, Sichuan University, Chengdu, 610064, Sichuan, People’s Republic of China

    Qiwu Shi & Tiecheng Lu

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  1. Yanyan Hu
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  2. Qiwu Shi
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  3. Wanxia Huang
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Correspondence to Qiwu Shi or Wanxia Huang.

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Hu, Y., Shi, Q., Huang, W. et al. Preparation and phase transition properties of Ti-doped VO2 films by sol–gel process. J Sol-Gel Sci Technol 78, 19–25 (2016). https://doi.org/10.1007/s10971-015-3913-z

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  • DOI: https://doi.org/10.1007/s10971-015-3913-z

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