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Synthesis and field emission properties of titanium carbide nanowires

机译:碳化钛纳米线的合成及场致发射特性

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Single crystalline TiC nanowires have been synthesized through a chloride-assisted carbothermal reduction process using active carbon, TiO2 and NaCl powders as precursors and carbon-coated cobalt or nickel nanoparticles as a catalyst. The products were characterized by x-ray diffraction, electron microscopy, energy-dispersive x-ray spectroscopy and x-ray photoelectron spectroscopy. The TiC nanowires have a face-centred cubic structure with a typical diameter of 20-50 nm and a length of up to a few microns. The formation of the product could be well correlated with the characteristic core-shell structure of the catalyst used. The field emission of the TiC nanowires follows the conventional Fowler-Nordheim behaviour and shows a low turn-on field of about 7.1 V mu m(-1) and good emission stability.
机译:单晶TiC纳米线已通过氯化物辅助碳热还原工艺合成,使用活性炭,TiO2和NaCl粉末作为前体,并用碳包覆的钴或镍纳米粒子作为催化剂。通过X射线衍射,电子显微镜,能量分散X射线光谱学和X射线光电子能谱表征产物。 TiC纳米线具有面心立方结构,其典型直径为20-50 nm,长度最大为几微米。产物的形成可以与所用催化剂的特征性核-壳结构很好地相关。 TiC纳米线的场发射遵循常规的Fowler-Nordheim行为,显示出约7.1 Vμm(-1)的低导通场和良好的发射稳定性。

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