纳米线
一氧化碳
材料科学
氧化物
湿度
工作(物理)
响应时间
金属
分子
纳米技术
分析化学(期刊)
化学
热力学
物理
计算机图形学(图像)
生物化学
催化作用
有机化学
冶金
色谱法
计算机科学
作者
Joan Daniel Prades,Francisco Hernández-Ramírez,T Fischer,Martin Hoffmann,Ralf Müller,Núria López,Sanjay Mathur,J.R. Morante
摘要
Self-heating effect in individual metal oxide nanowires can be used to activate their response to gases with power consumptions below tenths of microwatts. The thermal response time of these devices is extremely fast (a few milliseconds) and it makes it possible to observe the kinetics of the interactions between the gas molecules and the metal oxide. In this work we demonstrate that such effects enable an experimental methodology to improve the selectivity of metal oxide-based sensors based on the analysis of their fast response dynamics. Specifically, this work jointly analyzes the magnitude and response time of SnO2 nanowire-based sensors to carbon monoxide (CO) and humidity (H2O) mixtures, proving that a quantitative analysis of CO–H2O gas blends can be achieved by modulating their work temperature through the self-heating effect.
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