Element doping: a marvelous strategy for pioneering the smart applications of VO<sub>2</sub>
Element doping: a marvelous strategy for pioneering the smart applications of VO<sub>2</sub>
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元素掺杂：开创 VO<sub>2</sub> 智能应用的绝妙策略
作者：
Xue Yibei;Yin Shu
智能材料凭借其对外部刺激的自主反应行为引领着材料的未来；人们普遍认为，它们的开发和应用将带来一场新的革命。其中，二氧化钒（VO2）是一种特殊的金属材料，具有独特的多刺激响应型金属-绝缘体转变（MIT），并伴有结构相变（SPT），其光学、电学和热性能等物理性能发生显著变化，是智能窗、微测热计、致动器等的理想材料。由于VO2吸引人的性能植根于MIT行为（加上SPT），元素掺杂成为裁剪VO2性能的有力工具。从实际需求出发，元素掺杂的VO2在性能、前景、成本等方面都更具前景和竞争力。本文重点讨论了元素掺杂VO2的研究进展和面临的挑战。我们关注元素掺杂在调制VO2的性质和推动VO2的实用性方面的关键作用，旨在激发当前的研究，开拓VO2的新应用。
Smart materials are leading the future of materials by virtue of their autonomous response behavior to external stimuli; it is widely believed their development and application will bring a new revolution. Among them, vanadium dioxide (VO2) is a special one showing a unique multi-stimulus responsive metal–insulator transition (MIT) accompanied by a structural phase transition (SPT) with striking changes of physical properties including optical, electrical and thermal properties, etc., making it ideal for smart windows, micro-bolometers, actuators, etc. Since the attractive performances of VO2 are rooted in MIT behavior (coupled with SPT), element doping becomes a powerful tool in tailoring VO2 performance. Oriented on the practical requirements, element-doped VO2 is more promising and competitive in terms of performance, prospect, and cost. Here we focus specifically on element-doped VO2, the recent progress and potential challenges of which are discussed. We devote attention to the crucial roles of element doping in modulating the properties and driving the practicality of VO2, aiming to inspire current research to pioneer new applications of VO2.