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http://dx.doi.org/10.3740/MRSK.2011.21.9.486

Characteristics and Preparation of Gas Sensor Using Nano Indium Coated ZnO:In  

Jung, Jong-Hun (Department of Physics, Dong-Eui University and Convergence of IT Devices Institute Busan)
Yu, Yun-Sik (Radiological Science Department, Dong-Eui University and Convergence of IT Devices Institute Busan)
Yu, Il (Department of Physics, Dong-Eui University and Convergence of IT Devices Institute Busan)
Publication Information
Korean Journal of Materials Research / v.21, no.9, 2011 , pp. 486-490 More about this Journal
Abstract
Nano-indium-coated ZnO:In thick films were prepared by a hydrothermal method. ZnO:In gas sensors were fabricated by a screen printing method on alumina substrates. The gas sensing properties of the gas sensors were investigated for hydrocarbon gas. The effects of the indium concentration of the ZnO:In gas sensors on the structural and morphological properties were investigated by X-ray diffraction and scanning electron microscopy. XRD patterns revealed that the ZnO:In with wurtzite structure was grown with (1 0 0), (0 0 2), and (1 0 1) peaks. The quantity of In coating on the ZnO surface increased with increasing In concentration. The sensitivity of the ZnO:In sensors was measured for 5 ppm $CH_4$ gas and $CH_3CH_2CH_3$ gas at room temperature by comparing the resistance in air with that in target gases. The highest sensitivity to $CH_4$ gas and $CH_3CH_2CH_3$ gas of the ZnO:In sensors was observed at the In 6 wt%. The response and recovery times of the 6 wt% indiumcoated ZnO:In gas sensors were 19 s and 12 s, respectively.
Keywords
ZnO; In doping; $CH_4$; $CH_3CH_2CH_3$;
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1 X. Y. Xue, L. M. Li, H. C. Yu, Y. J. Chen, Y. G. Wang and T. H. Wang, Appl. Phys. Lett., 89, 043118 (2006).   DOI   ScienceOn
2 W. Gopel and K. D. Schierbaum, Sensor. Actuator. B Chem., 26, 1 (1995).   DOI   ScienceOn
3 H. S. Moon, S. H. Park, S. E. Kim and Y. S. Yu, J. Kor. Sensor. Soc., 19, 462 (2010) (in Korean).
4 I. Yu and J. Y. Lee, Kor. J. Mater. Res., 20(8), 408 (2010) (in Korean).
5 I. Yu and J. Y. Lee, Kor. J. Mater. Res., 21(4), 207 (2011) (in Korean).
6 J. Jie, G. Wang, X. Han and J. G. Hou, J. Phys. Chem. B, 108, 17027 (2004).   DOI   ScienceOn
7 J. Zhong, S. Muthukumar, Y. Chen, Y. Lu, H. M. Ng, W. Jiang and E. L. Garfunkel, Appl. Phys. Lett., 83, 3401 (2003).   DOI   ScienceOn