Abstract
This study was focused on how to improve the gas sensing properties of resistive gas sensors based on reduced graphene oxide. Sol-airbrush technology was utilized to prepare reduced graphene oxide films using porous zinc oxide films as supporting materials mainly for carbon dioxide sensing applications. The proposed film structure improved the sensitivity and the response/recovery speed of the sensors compared to those of the conventional ones and alleviated the restrictions of sensors' performance to the film thickness. In addition, the fabrication technology is relatively simple and has potential for mass production in industry. The improvement in the sensitivity and the response/recovery speed is helpful for fast detection of toxic gases or vapors in environmental and industrial applications.
Document Type
Article
Publication Date
7-21-2014
Digital Object Identifier (DOI)
http://dx.doi.org/10.1063/1.4890843
Funding Information
This work was partially supported by the National Natural Science Foundation of China (Grant Nos. 61176006 and 61101031) and Specialized Research Fund for the Doctoral Program of Higher Education (No. 20120185110012).
Repository Citation
Zhou, Yong; Xie, GuangZhong; Xie, Tao; Yuan, Huan; Tai, HuiLing; Jiang, YaDong; and Chen, Zhi, "A Sensitive Film Structure Improvement of Reduced Graphene Oxide Based Resistive Gas Sensors" (2014). Electrical and Computer Engineering Faculty Publications. 6.
https://uknowledge.uky.edu/ece_facpub/6
Fig. 1 High-Resolution. Test apparatus for prepared gas sensors exposed to (a) volatile organic compound (VOC) vapors and (b) inorganic gases.
Figure 1.pptx (61 kB)
Fig. 1 Powerpoint. Test apparatus for prepared gas sensors exposed to (a) volatile organic compound (VOC) vapors and (b) inorganic gases.
2.tif (219 kB)
Fig. 2 High-Resolution. Schematic diagrams of (a) single-layer film (b) two-step film.
Figure 2.pptx (68 kB)
Fig. 2 Powerpoint. Schematic diagrams of (a) single-layer film (b) two-step film.
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Fig. 3 High-Resolution. SEM pictures of (a) surface morphology (b) cross-section of single-layer ZnO film, and surface morphology of (c) single-layer RGO film (d) two-step film.
Figure 3.pptx (324 kB)
Fig. 3 Powerpoint. SEM pictures of (a) surface morphology (b) cross-section of single-layer ZnO film, and surface morphology of (c) single-layer RGO film (d) two-step film.
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Fig. 4 High-Resolution. Real-time electric resistance change of (a) Sensor 1 (b) Sensor 4 at various concentrations of carbon dioxide, and (c) sensing responses of Sensors 1–4 to carbon dioxide and (d) real-time sensing responses of Sensor 4 to 5000 ppm carbon dioxide with two carrier gases.
Figure 4.pptx (106 kB)
Fig. 4 Powerpoint. Real-time electric resistance change of (a) Sensor 1 (b) Sensor 4 at various concentrations of carbon dioxide, and (c) sensing responses of Sensors 1–4 to carbon dioxide and (d) real-time sensing responses of Sensor 4 to 5000 ppm carbon dioxide with two carrier gases.
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Fig. 5 High-Resolution. (a) Sensing responses to various concentrations of carbon dioxide, (b) sensing responses of Sensors 5–8 to 1000 ppm carbon dioxide, and (c) real-time sensing responses of Sensors 9–12 to various concentration levels of carbon dioxide.
Figure 5.pptx (104 kB)
Fig. 5 Powerpoint. (a) Sensing responses to various concentrations of carbon dioxide, (b) sensing responses of Sensors 5–8 to 1000 ppm carbon dioxide, and (c) real-time sensing responses of Sensors 9–12 to various concentration levels of carbon dioxide.
Table 1.GIF (20 kB)
Table 1. Parameters of all prepared sensors.
Notes/Citation Information
Published in Applied Physics Letters, v. 105, no. 3, article 033502, p. 1-5.
Copyright 2014 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
The following article appeared in Applied Physics Letters, v. 105, no. 3, article 033502, p. 1-5 and may be found at http://dx.doi.org/10.1063/1.4890843.