Synthesis and Field Emission Property of V2O5·nH2O Nanotube Arrays

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• 作者：Chiwei Zhou ; Liqiang Mai ; Yueli Liu ; Yanyuan Qi ; Ying Dai ; Wen Chen
• 刊名：Journal of Physical Chemistry C
• 出版年：2007
• 出版时间：June 14, 2007
• 年：2007
• 卷：111
• 期：23
• 页码：8202 - 8205
• 全文大小：252K
• 年卷期：v.111,no.23(June 14, 2007)
• ISSN：1932-7455

文摘

Hydrated vanadium pentoxide (V₂O₅·nH₂O) nanotube arrays with outer diameters of 200 nm and lengths ofmore than 5 m have been synthesized via template-based physical wetting of V₂O₅ sols. The V₂O₅·nH₂Onanotube arrays were characterized by scanning electron microscopy, X-ray diffraction, and high-resolutiontransmission electron microscopy . The field emission (FE) of the V₂O₅·nH₂O nanotube arrays shows a turn-on field of about 6.35 V/m at a current density of 10 A/cm² and an emission current density up to 2.1mA/cm² at a field of 9.20 V/m. The corresponding Fowler-Nordheim plot shows a linear behavior. Thesefeatures make the V₂O₅·nH₂O nanotube array a promising candidate for FE emitters.