离子液体
钨
氧化物
材料科学
晶体管
氧化钨
离子键合
光电子学
门控
氢
电化学
离子
纳米技术
电极
化学
电压
电气工程
催化作用
有机化学
冶金
工程类
生理学
物理化学
生物
作者
Martin S. Barbosa,Ranilson Angelo da Silva,Clara Santato,Marcelo O. Orlandi
出处
期刊:Journal of vacuum science & technology
[American Institute of Physics]
日期:2021-11-30
卷期号:40 (1)
被引量:1
摘要
Molecular hydrogen (H2) shows promise as a future renewable energy carrier. However, due to safety concerns, its reliable detection in different atmospheres is an important issue. Here, we propose a hydrogen sensor based on ion-gated transistors exploiting the interface between tungsten oxide and ionic liquids. Two different approaches to gas sensors (metal oxide gas sensor and ionic liquid-based electrochemical sensor) are integrated in a single device. We demonstrate that ionic liquid gating enhances the effect of H2 on the tungsten oxide transistor channel. The transistor current response permits the detection of H2 in an O2-free environment with the device operating in room temperature. After H2 sensing, the initial properties of the tungsten oxide channel can be recovered by exposure to O2.
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