期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 221, 期 -, 页码 760-768出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2015.06.137
关键词
Flexible NO2 sensor; MWCNTs; WO3 NPs; Hybrid; PET substrate
资金
- Basic Science Research Program through National Research Foundation of Korea (NRF) - Ministry of Science, ICT and Future Planning [NRF-2014R1A2A2A01002668]
Fabrication and evolution of a flexible nitrogen dioxide (NO2) sensor made of a multi-walled carbon nanotubes tungsten trioxide nanoparticles (MWCNTs-WO3 NPs) hybrid on a polyethylene terephthalate (PET) substrate has been studied. Hydrothermally synthesized WO3 NPs and commercial MWCNTs were mixed with the assistance of a-terpineol to obtain the viscous gel of MWCNTs-WO3 NPs hybrid. The assynthesized hybrid was gel casted on a PET substrate to fabricate the flexible sensor device. The flexible sensor showed enhanced NO2 sensing performance at room temperature with excellent mechanical flexibility, even at a curvature angle of 90 degrees and after bending/relaxing several times (10(3), 10(4), 10(6), and 10(8)). A maximum response of 14% (5 ppm) to NO2 with a limit of detection CLOD) of 0.1 ppm and relatively better recovery time (27 min) were obtained. Along with the enhanced sensing properties, lightweight and mechanical robustness of the as-prepared MWCNTs-WO3 NPs hybrid might makes it a promising building block for a flexible NO2 sensor. (C) 2015 Elsevier B.V. All rights reserved.
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