Synthesis of Potassium Tungsten Bronze Nanosheets by Phase Transformation

Authors

  • JingFang Qin,

    1. Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics, Peking University, Beijing, China
    2. Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, China
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  • YingJie Xing,

    Corresponding author
    • Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics, Peking University, Beijing, China
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  • GengMin Zhang

    1. Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics, Peking University, Beijing, China
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Author to whom correspondence should be addressed. e-mail: xingyj@pku.edu.

Abstract

Single-crystalline potassium tungsten bronze nanosheets were prepared by reducing potassium tungsten oxide nanosheets grown on a W foil. The nanosheets showed no evident shape change before and after reduction. Morphology, structure, and composition analyses revealed that a phase transformation from orthorhombic potassium tungsten oxide to hexagonal potassium tungsten bronze occurred. Better field emission with lower turn-on field was measured from potassium tungsten bronze nanosheet film. The effects of reduction treatment on field emission performance are discussed.

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