Single CeO2 nanowire gas sensor supported with Pt nanocrystals:: Gas sensitivity, surface bond states, and chemical mechanism
Single CeO2 nanowire gas sensor supported with Pt nanocrystals:: Gas sensitivity, surface bond states, and chemical mechanism
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DOI：
10.1021/jp7117778
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发表时间：
2008-06-19
影响因子：
3.7
通讯作者：
Yu, T.
中科院分区：
文献类型：
--
作者：
Liao, L.;Mai, H. X.;Yu, T.
我们提出了一种新型的CeO2纳米器件，其中使用了一根CeO2纳米线作为传感单元。研究发现，在CeO2纳米线上掺入铂纳米晶可以显著提高传感器的响应速度。利用局域电子能量损失谱和X射线光电子能谱对纳米线的形貌和表面键态进行了研究，探讨了可能的机理。这一结果为更好地了解纳米线的表面物理和化学特性，提高气体传感器的性能提供了一条途径。
We present a new type of CeO2 nanodevice in which a single CeO2 nanowire was used as the sensing unit. It was found that incorporation of Pt nanocrystals on CeO2 nanowire could significantly increase the sensor response. A possible mechanism was discussed based on the study of morphology and surface bond states of the nanowire using local electron energy loss spectroscopy and X-ray photoemission spectroscopy. The results provide a pathway to improve the performance of gas sensors with a good understanding of the nanowire's surface physics and chemistry.