Morphology-Tuned Synthesis of Single-Crystalline V5Si3 Nanotubes and Nanowires

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• 作者：Juneho In ; Kwanyong Seo ; Sunghun Lee ; Hana Yoon ; Jeunghee Park ; Gangho Lee ; Bongsoo Kim
• 刊名：Journal of Physical Chemistry C
• 出版年：2009
• 出版时间：July 30, 2009
• 年：2009
• 卷：113
• 期：30
• 页码：12996-13001
• 全文大小：334K
• 年卷期：v.113,no.30(July 30, 2009)
• ISSN：1932-7455

文摘

We report the morphology-tuned synthesis of single-crystalline V₅Si₃ nanotubes and nanowires. Free-standing hexagonal V₅Si₃ nanostructures are grown on a vanadium foil substrate placed on Si powder by a chemical vapor deposition method. By controlling the reaction time and substrate temperature, we have succeeded in morphology tuning of V₅Si₃ nanotubes and nanowires. When the downstream temperature is fixed at 950 °C, V₅Si₃ nanotubes are formed with the reaction time of 5 min and V₅Si₃ nanowires are obtained with the reaction time of 15 min. With the downstream temperature of 950 °C and the reaction time of 15 min, when Si powder is mixed with carbon powder to the Si composition of 10−50%, both nanotubes and nanowires are simultaneously formed on the vanadium foil along the temperature gradient. Single-crystalline V₅Si₃ nanotubes thus synthesized are the first metal silicide nanotubes reported so far.