Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 276, Issue -, Pages 262-270Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2018.07.020
Keywords
3D IO multilayer films; Nondestructive transfer; ZnO-In2O3; Ultrasonic nebulization deposition method; PS spheres template; Stable gas sensor
Funding
- National Key Research and Development Program [2016YFC0207300]
- National Nature Science Foundation of China [61722305, 61503148, 61520106003, 61327804]
- Science and Technology Development Program of Jilin Province [20170520162JH]
- China Postdoctoral Science Foundation [2017T100208, 2015M580247]
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The preparation of highly ordered porous semiconducting metal oxides (SMOs) films is a hot issue in the field of chemical sensor. Herein, we successfully fabricated 3D inverse opal (IO) ZnO-In2O3 composites multilayer films (MFs) via a novel strategy that combing ultrasonic nebulization deposition technique with polystyrene (PS) spheres template. Such one-step synthetic method is advantageous to achieve the construction of large-scale interconnected macro-porous (pore size: similar to 170 nm) structure in composites materials, which is beneficial for facilitating gas molecule transport into the sensing layers and accelerating the surface reactions process. More significantly, by using this method, the large-scale 3D IO MFs made in this work can be easily transferred onto any target substrates without being destroyed. Due to the IO multilayer films structure and abundant hetero-interfaces, the 3D IO ZnO-In2O3 MFs-based gas sensor exhibited higher response toward acetone at lower operating temperature, better selectivity and long-term stability, faster recovery speed and lower detection limit. Consequently, the approach described herein is more suitable for the synthesis of porous composites materials films, in order to fabricate high performance chemical sensor.
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