Electronic Materials Letters

, Volume 13, Issue 4, pp 351–358 | Cite as

Field-emission property of self-purification SiC/SiOx coaxial nanowires synthesized via direct microwave irradiation using iron-containing catalyst

  • Qing Zhou
  • Yongzhi Yu
  • Shan Huang
  • Jiang Meng
  • Jigang Wang
Article
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Abstract

SiC/SiOx coaxial nanowires were rapidly synthesized via direct microwave irradiation in low vacuum atmosphere. During the preparation process, only graphite, silicon, silicon dioxide powders were used as raw materials and iron-containing substance was employed as catalyst. Comprehensive characterizations were employed to investigate the microstructure of the products. The results showed that a great quantity of coaxial nanowires with uniform sizes and high aspect ratio had been successfully achieved. The coaxial nanowires consist of a silicon oxide (SiOx) shell and a β-phase silicon carbide (β-SiC) core that exhibited in special tube brush like. In additional, nearly all the products were achieved in the statement of pure SiC/SiOx coaxial nanowires without the existence of metallic catalyst, indicating that the self-removal of iron (Fe) catalyst should be occurred during the synthesis process. Photoluminescence (PL) spectral analysis result indicated that such novel SiC/SiOx coaxial nanowires exhibited significant blue-shift. Besides, the measurement results of field-emission (FE) demonstrated that the SiC/SiOx coaxial nanowires had ultralow turn-on field and threshold field with values of 0.2 and 2.1 V/μm, respectively. The hetero-junction structure formed between SiOx shell and SiC core, lots of emission sites, as well as clear tips of the nanowires were applied to explain the excellent FE properties.
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Keywords

SiC/SiOx coaxial nanowires microwave synthesis catalyst field-emission 
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Copyright information

© The Korean Institute of Metals and Materials and Springer Science+Business Media Dordrecht 2017

Authors and Affiliations

  • Qing Zhou
    • 1
    • 2
  • Yongzhi Yu
    • 1
    • 2
  • Shan Huang
    • 1
  • Jiang Meng
    • 3
  • Jigang Wang
    • 1
    • 2
    • 3
  1. 1.Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and EngineeringSoutheast UniversityNanjingChina
  2. 2.Southeast University Zhangjiagang Industrial Technology Research InstituteZhangjiagangChina
  3. 3.Xizang Key Laboratory of Optical Information Processing and Visualization Technology, School of Information EngineeringXizang Minzu UniversityXianyangChina

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