Flexible ultra-sensitive and resistive NO2 gas sensor based on nanostructured Zn(x)Fe(1−x)2O4 |
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| Authors: | Solleti Goutham Kishor Kumar Sadasivuni Devarai Santhosh Kumar Kalagadda Venkateswara Rao |
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| Affiliation: | Nano Electronics Laboratory, Centre for Nano Science and Technology, JNT University Hyderabad, Kukatpally, Hyderabad-500085 Telangana State India, +91 9440858664 ; Center for Advanced Materials, Qatar University, P. O. Box 2713, Doha Qatar ; Department of Chemical Engineering, IIT – Hyderabad, Kandi-502285 Telangana India |
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| Abstract: | Low concentration gas detection, rapid response time and low working temperature are anticipated for a varied range of toxic gas detection applications. Conversely, the existing gas sensors suffer mostly from a high working temperature along with a slow response at low concentrations of analytes. Here, we report an ultrasensitive flexible nanostructured Zn(x)Fe(1−x)2O4 (x = 0.1, 0.5 and 0.9) based chemiresistive sensor for nitrogen dioxide (NO2) detection. We evince that the prepared flexible sensor Zn(0.5)Fe(0.5)2O4 has detection potential as low as 5 ppm at a working temperature of 90 °C in a short phase. Further, the Zn(0.5)Fe(0.5)2O4 sensor exhibits excellent selectivity, stability and repeatability. The optimized sensor sensing characteristics can be helpful in tremendous development of foldable mobile devices for environmental monitoring, protection and control.Low concentration gas detection, rapid response time and low working temperature are anticipated for a varied range of toxic gas detection applications. |
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