Abstract In this work, we report the facile synthesis of hydrated vanadium pentoxide (V2O5·1.6H2O) nanostars using hydrothermal route and their use was demonstrated and compared with nanowire type structure for sensing of helium gas for the first time. The gas sensing properties were attributed to the electron hopping mechanism in V2O5·1.6H2O nanostructures at room temperature. We observed that the change in morphology of V2O5·1.6H2O helps to augment the overall response (to 53% at 300 ppm) with very low response/recovery time (9/10 s). The excellent sensing properties at room temperature, make V2O5·1.6H2O nanostructures a potential material for He gas sensing application.

中文翻译：

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用于在室温下感测氦气的高灵敏度 V 2 O 5 ·1.6H 2 O 纳米结构

摘要 在这项工作中，我们报道了使用水热法简便合成水合五氧化二钒（V2O5·1.6H2O）纳米星的方法，并首次展示了它们的用途，并与纳米线型结构进行了氦气传感的比较。气敏特性归因于室温下V2O5·1.6H2O纳米结构中的电子跳跃机制。我们观察到 V2O5·1.6H2O 形态的变化有助于增加整体响应（在 300 ppm 时达到 53%），响应/恢复时间非常短（9/10 秒）。优异的室温传感特性，使V2O5·1.6H2O纳米结构成为He气传感应用的潜在材料。