Browse > Article
http://dx.doi.org/10.3740/MRSK.2014.24.3.152

Effect of an Au Nanodot Nucleation Layer on CO Gas Sensing Properties of Nanostructured SnO2 Thin Films  

Hung, Nguyen Le (Department of Materials Science and Engineering, Chungnam National University)
Kim, Hyojin (Department of Materials Science and Engineering, Chungnam National University)
Kim, Dojin (Department of Materials Science and Engineering, Chungnam National University)
Publication Information
Korean Journal of Materials Research / v.24, no.3, 2014 , pp. 152-158 More about this Journal
Abstract
We report the effect of the fabric of the surface microstructure on the CO gas sensing properties of $SnO_2$ thin films deposited on self-assembled Au nanodots ($SnO_2$/Au) that were formed on $SiO_2/Si$ substrates. We characterized structural and morphological properties, comparing them to those of $SnO_2$ thin films deposited directly onto $SiO_2/Si$ substrates. We observed a significant enhancement of CO gas sensing properties in the $SnO_2$/Au gas sensors, specifically exhibiting a high maximum response at $200^{\circ}C$ and quite a low detection limit of 1 ppm level in dry air. In particular, the response of the $SnO_2/Au$ gas sensor was found to reach the maximum value of 32.5 at $200^{\circ}C$, which is roughly 27 times higher than the response (~1.2) of the $SnO_2$ gas sensor obtained at the same operating temperature of $200^{\circ}C$. Furthermore, the $SnO_2/Au$ gas sensors displayed very fast response and recovery behaviors. The observed enhancement in the CO gas sensing properties of the $SnO_2/Au$ sensors is mainly ascribed to the formation of a nanostructured morphology in the active $SnO_2$ layer having a high specific surface-reaction area by the insertion of a nanodot form of Au nucleation layer.
Keywords
tin oxide; nanostructured oxide; gas sensor; Au nanodot; sputtering;
Citations & Related Records
연도 인용수 순위
  • Reference
1 G. Korotcenkov, B. K. Cho, L. Gulina and V. Tolstoy, Sens. Actuators B, 141, 610 (2009).   DOI
2 S. W. Lee, P. P. Tsai and H. Chen, Sens. Actuators B, 67, 122 (2000).   DOI
3 T. Seiyama, A. Kato, K. Fujiishi and M. Nagatani, Anal. Chem., 34, 1502 (1962).   DOI
4 M. Hubner, C. E. Simion, A. Haensch, N. Barsan and U. Weimar, Sens. Actuators B, 151, 103 (2010).   DOI
5 R. Rella, A. Serra, P. Siciliano, L. Vasanelli, G. De and A. Licciulli, Thin Solid Films, 304, 339 (1997).   DOI
6 J. H. Sung, Y. S. Lee, J. W. Lim, Y. H. Hong and D. D. Lee, Sens. Actuators B, 66, 149 (2000).   DOI
7 I. Fasaki, M. Suchea, G. Mousdis, G. Kiriakidis and M. Kompitsas, Thin Solid Films, 518, 1109 (2009).   DOI
8 H. Huang, C. Y. Ong, J. Guo, T. White, M. S. Tse and O. K. Tan, Nanoscale, 2, 1203 (2010).   DOI
9 G. Neri, A. Bonavita, G. Rizzo, S. Galvagno, N. Pinna, M. Niederberger, S. Capone and P. Siciliano, Sens. Actuators B, 122, 564 (2007).   DOI   ScienceOn
10 Y. Wang, X. Jiang, and Y. Xia, J. Am. Chem. Soc., 125, 16176 (2003).   DOI   ScienceOn
11 B. M. Matin, Y. Mortazavi, A. A. Khodadadi, A. Abbasi and A. A. Firooz, Sens. Actuators, B 151, 140 (2010).   DOI
12 N. L. Hung, H. Kim, S.-K. Hong and D. Kim, Sens. Actuators B, 151, 127 (2010).   DOI   ScienceOn
13 M. Takata, D. Tsubone and H. Yanagida, J. Am. Ceram. Soc., 59, 4 (1976).   DOI   ScienceOn
14 S. M. Sedghi, Y. Mortazavi and A. Khodadadi, Sens. Actuators B, 145, 7 (2010).   DOI
15 R. J. S. Scott, S. M. Yang, G. Chabanis, N. Coombs, D. E. Williams and G. A. Ozin, Adv. Mater., 13, 1468 (2001).   DOI
16 J. K. Choi, I. S. Hwang, S. J. Kim, J. S. Park, S. S. Park, U. Jeong, Y. C. Kang and J. H. Lee, Sens. Actuators B, 150, 191 (2010).   DOI   ScienceOn
17 NIOSH Pocket Guide to Chemical Hazards, 3rd ed., National Institute for Occupational Safety and Health, Cincinnati (2007).
18 A. Khanna, R. Kumar, and S. S. Bhatti, Appl. Phys. Lett., 82, 4388 (2003).   DOI