Substrate-dependent structural and CO sensing properties of LaCoO3 epitaxial films
Substrate-dependent structural and CO sensing properties of LaCoO3 epitaxial films
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LaCoO3 外延膜的基底依赖性结构和 CO 传感特性
DOI:
10.1016/j.apsusc.2018.02.221
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发表时间:
2018-06
影响因子:
6.7
通讯作者:
Yanping Zhang
中科院分区:
文献类型:
--
作者:
Haifeng Liu;Hongjuan Sun;Ruishi Xie;Xingquan Zhang;Kui Zheng;Tongjiang Peng;Xiaoyu Wu;Yanping Zhang
LaCoO3thin films were grown on different (0 0 1) oriented LaAlO3, SrTiO3and (LaAlO3)0.3(Sr2AlTaO6)0.7by the polymer assisted deposition method, respectively. All the LaCoO3thin films are in epitaxial growth on these substrates, with tetragonal distortion of CoO6octahedrons. Due to different in-plane lattice mismatch, the LaCoO3film on LaAlO3has the largest tetragonal distortion of CoO6octahedrons while the film grown on (LaAlO3)0.3(Sr2AlTaO6)0.7has the smallest tetragonal distortion. The relative contents of the surface absorbed oxygen species are found to increase for the LaCoO3epitaxial films grown on (0 0 1) oriented (LaAlO3)0.3(Sr2AlTaO6)0.7, SrTiO3and LaAlO3substrates, sequentially. The film sensors exhibit good CO sensing properties at 150 °C, and the LaCoO3film on LaAlO3shows the highest response but the film on (LaAlO3)0.3(Sr2AlTaO6)0.7shows the lowest. It reveals that the larger degree of Jahn-Teller-like tetragonal distortion of CoO6octahedrons may greatly improve the surface absorbing and catalytic abilities, corresponding to more excellent CO sensing performance. The present study suggests that the formation of epitaxial films is an efficient methodology for controlling the octahedral distortion and thereby improving the gas sensing performance of perovskite transition metal oxides.
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影响因子:
4.6
作者:
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通讯作者:
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DOI:
10.1002/pssb.201600315
发表时间:
2016-08
期刊:
physica status solidi (b)
影响因子:
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作者:
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通讯作者:
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影响因子:
3.7
作者:
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通讯作者:
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