Single crystal VO₂ is a strongly correlated electron material that has shown great potential for a wide range of high-performance modern device applications, such as microbolometers, lithium ion batteries, microactuators and strain sensors. However, the present fabrication methods for single crystal VO₂ almost always require complicated procedures, strict conditions and long reaction times of up to one week. Here, we report a simple, fast, low-cost and green method for fabricating single crystal VO₂ using a thermal oxidation route based on resistive heating of a vanadium foil in air. Our method not only reduces the complete fabrication time from hours to tens of seconds but also naturally forms single crystal VO₂ microtube arrays that are nearly vertically aligned on the surface of a V₂O₅ substrate. Microstructure characteristics and the reversible phase transition between the monoclinic VO₂ and rutile VO₂ phases demonstrate that the obtained single crystal VO₂ is the same as that achieved by other fabrication methods.

单晶VO ₂是一种高度相关的电子材料，已在各种高性能现代设备应用中显示出巨大潜力，例如微测辐射热计，锂离子电池，微致动器和应变传感器。然而，目前用于单晶VO _2的制造方法几乎总是需要复杂的过程，严格的条件和长达一周的长反应时间。在这里，我们报告了一种简单，快速，低成本和绿色的方法，该方法通过基于空气中钒箔的电阻加热的热氧化途径来制造单晶VO ₂。我们的方法不仅将整个制造时间从数小时减少到数十秒，而且自然形成了单晶VO ₂在V ₂ O ₅基板表面上几乎垂直对齐的微管阵列。单斜晶VO ₂和金红石VO ₂相之间的微观结构特征和可逆相变证明，所获得的单晶VO ₂与通过其他制造方法获得的单晶VO ₂相同。