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논문 기본 정보

자료유형
학술저널
저자정보
Qing Zhou (Southeast University) Yongzhi Yu (Southeast University) Shan Huang (Southeast University) Jiang Meng (Xizang Minzu University) Jigang Wang (Southeast University)
저널정보
대한금속·재료학회 Electronic Materials Letters Electronic Materials Letters Vol.13 No.4
발행연도
2017.1
수록면
351 - 358 (8page)

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초록· 키워드

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SiC/SiOx coaxial nanowires were rapidly synthesized via directmicrowave irradiation in low vacuum atmosphere. During the preparationprocess, only graphite, silicon, silicon dioxide powders were used as rawmaterials and iron-containing substance was employed as catalyst. Comprehensive characterizations were employed to investigate themicrostructure of the products. The results showed that a great quantityof coaxial nanowires with uniform sizes and high aspect ratio had beensuccessfully achieved. The coaxial nanowires consist of a silicon oxide(SiOx) shell and a β-phase silicon carbide (β-SiC) core that exhibited inspecial tube brush like. In additional, nearly all the products wereachieved in the statement of pure SiC/SiOx coaxial nanowires withoutthe 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 suchnovel SiC/SiOx coaxial nanowires exhibited significant blue-shift. Besides, the measurement results of field-emission (FE) demonstratedthat the SiC/SiOx coaxial nanowires had ultralow turn-on field andthreshold field with values of 0.2 and 2.1 V/μm, respectively. The heterojunctionstructure formed between SiOx shell and SiC core, lots ofemission sites, as well as clear tips of the nanowires were applied toexplain the excellent FE properties.

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