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首页> 外文期刊>The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical >Development and characterization of Au-YSZ surface plasmon resonance based sensing materials: High temperature detection of CO
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Development and characterization of Au-YSZ surface plasmon resonance based sensing materials: High temperature detection of CO

机译：基于Au-YSZ表面等离子体共振的传感材料的开发与表征：CO的高温检测

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摘要

Au-YSZ nanocomposite films exhibited a surface plasmon resonance absorption band around 600 nm that underwent a reversible blue shift and narrowed upon exposure to CO in air at 500 degrees C. A linear dependence of the sensing signal was observed for CO concentrations ranging between 0.1 and 1 vol % in an air carrier gas. This behavior of the SPR band, upon exposure to CO, was not observed when using nitrogen as the carrier gas, indicating an oxygen-dependent reaction mechanism. Additionally, the SPR band showed no measurable signal change upon exposure to CO at temperatures below similar to 400 degrees C. The oxygen and temperature dependent characteristics, coupled with the oxygen ion formation and conduction properties of the YSZ matrix, are indicative of charge-transfer reactions occurring at the three-phase boundary region between oxygen, Au, and YSZ, which result in charge transfer into the Au nanoparticles. These reactions are associated with the oxidation of CO and a corresponding reduction of the YSZ matrix. The chemical-reaction-induced charge injection into the Au nanoparticles results in the observed blue shift and narrowing of the SPR band.
机译：Au-YSZ纳米复合薄膜在600 nm附近表现出表面等离振子共振吸收带，该吸收带经历可逆的蓝移，并且在500摄氏度的空气中暴露于CO时变窄。对于浓度范围为0.1到0.1的CO，观察到传感信号的线性依赖性。在空气载气中为1 vol％。当使用氮气作为载气时，未观察到SPR带在暴露于CO时的这种行为，表明了氧依赖性反应机理。此外，SPR谱带在低于约400摄氏度的温度下暴露于CO时未显示可测量的信号变化。取决于氧和温度的特性，以及YSZ基质的氧离子形成和传导特性，表明电荷转移在氧，金和YSZ之间的三相边界区域发生反应，导致电荷转移到金纳米颗粒中。这些反应与CO的氧化和YSZ基质的相应还原有关。化学反应诱导的电荷注入到Au纳米颗粒中会导致观察到的蓝移和SPR谱带的变窄。

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