Location via proxy:   [ UP ]  
[Report a bug]   [Manage cookies]                
skip to main content
article
Free access

Sensing of ethanol with nanosize Fe-ZnO thin films

Published: 01 January 2009 Publication History

Abstract

Sensing of ethanol with iron doped ZnO (Fe-ZnO) thin films has been studied in this work. By X-ray diffraction spectroscopy, it is found that ZnO is the main compound in the low-iron (<10%) doped ZnO thin films. ZnFe2O4 is also found as 20-50% of iron are doped on the thin films. The 5% Fe-ZnO thin film has a very high sensitivity (Rair/Rethanol > 70) to 1000 ppm of ethanol at 300 K. It seems that iron can promote the sensivity of the ZnO thin film. The thin film doped with a greater amount (20-50%) of iron has, however, a much less sensitivity (<15) to ethanol. The chemical interactions between oxygen of ethanol and zinc on the Fe-ZnO thin film cause changes of the bond distances of Zn-O and Fe-O in the thin films to 1.90 and 1.98 Å which can be restored to 1.91 and 1.97 Å, respectively, in the absence of ethanol.

References

[1]
T. Seiyama, A. Kato, K. Fujiishi, and M. Nagatani, "A new detector for gaseous components using semiconductive thin films," Analytical Chemistry, vol. 34, no. 11, pp. 1502-1503, 1962.
[2]
D. F. Paraguay, M. Miki-Yoshida, J. Morales, J. Solis, and L.W. Estrada, "Influence of Al, In, Cu, Fe and Sn dopants on the response of thin film ZnO gas sensor to ethanol vapour," Thin Solid Films, vol. 373, no. 1-2, pp. 137-140, 2000.
[3]
I. Stambolova, K. Konstantinov, S. Vassilev, P. Peshev, and T. Tsacheva, "Lanthanum doped SnO2 and ZnO thin films sensitive to ethanol and humidity," Materials Chemistry and Physics, vol. 63, no. 2, pp. 104-108, 2000.
[4]
S. M. Chou, L. G. Teoh, W. H. Lai, Y. H. Su, and M. H. Hon, "ZnO:Al thin film gas sensor for detection of ethanol vapor," Sensors, vol. 6, no. 10, pp. 1420-1427, 2006.
[5]
L.-J. Meng and M. P. dos Santos, "Properties of indium tin oxide (ITO) films prepared by r.f. reactive magnetron sputtering at different pressures," Thin Solid Films, vol. 303, no. 1-2, pp. 151-155, 1997.
[6]
X. L. Cheng, H. Zhao, L. H. Huo, S. Gao, and J. G. Zhao, "ZnO nanoparticulate thin film: preparation, characterization and gas-sensing property," Sensors and Actuators B, vol. 102, no. 2, pp. 248-252, 2004.
[7]
M. Ohyama, H. Kozuka, and T. Yoko, "Sol-gel preparation of transparent and conductive aluminum-doped zinc oxide films with highly preferential crystal orientation," Journal of the American Ceramic Society, vol. 81, no. 6, pp. 1622-1632, 1998.
[8]
P. P. Sahay and R. K. Nath, "Al-doped ZnO thin films as methanol sensors," Sensors and Actuators B, vol. 134, no. 2, pp. 654-659, 2008.
[9]
E. Traversa and A. Bearzotti, "A novel humidity-detection mechanism for ZnO dense pellets," Sensors and Actuators B, vol. 23, no. 2-3, pp. 181-186, 1995.
[10]
P. Nunes, E. Fortunato, A. Lopes, and R. Martins, "Influence of the deposition conditions on the gas sensitivity of zinc oxide thin films deposited by spray pyrolysis," International Journal of Inorganic Materials, vol. 3, no. 8, pp. 1129-1131, 2001.
[11]
S. K. Hazra and S. Basu, "Hydrogen sensitivity of ZnO p-n homojunctions," Sensors and Actuators B, vol. 117, no. 1, pp. 177-182, 2006.
[12]
Y. Liu and M. Liu, "Ordered ZnO nanorods synthesized by combustion chemical vapor deposition," Journal of Nanoscience and Nanotechnology, vol. 7, no. 12, pp. 4529-4533, 2007.
[13]
L. P. Schuler, M. M. Alkaisi, P. Miller, and R. J. Reeves, "UV sensing using surface acoustic wave device on DC sputtered ZnO monolayer," Microelectronic Engineering, vol. 83, no. 4-9, pp. 1403-1406, 2006.
[14]
M. S. Wagh, L. A. Patil, T. Seth, and D. P. Amalnerkar, "Surface cupricated SnO2-ZnO thick films as a H2S gas sensor," Materials Chemistry and Physics, vol. 84, no. 2-3, pp. 228-233, 2004.
[15]
S. Dixit, A. Srivastava, A. Srivastava, and R. K. Shukla, "Sol-gel derived zinc oxide films and their sensitivity to humidity," Japanese Journal of Applied Physics, vol. 47, no. 7, pp. 5613-5618, 2008.
[16]
K. R. Murali, "Properties of sol-gel dip-coated zinc oxide thin films," Journal of Physics and Chemistry of Solids, vol. 68, no. 12, pp. 2293-2296, 2007.
[17]
E. Comini, "Metal oxide nano-crystals for gas sensing," Analytica Chimica Acta, vol. 568, no. 1-2, pp. 28-40, 2006.
[18]
N. Yamazoe, "New approaches for improving semiconductor gas sensors," Sensors and Actuators B, vol. 5, no. 1-4, pp. 7-19, 1991.
[19]
R. Wang, L. L. H. King, and A. W. Sleight, "Highly conducting transparent thin films based on zinc oxide," Journal of Materials Research, vol. 11, no. 7, pp. 1659-1664, 1996.

Index Terms

  1. Sensing of ethanol with nanosize Fe-ZnO thin films

          Recommendations

          Comments

          Information & Contributors

          Information

          Published In

          cover image Journal of Nanomaterials
          Journal of Nanomaterials  Volume 2009, Issue
          Special issue on nanocomposites for engineering applications
          January 2009
          67 pages
          ISSN:1687-4110
          EISSN:1687-4129
          Issue’s Table of Contents

          Publisher

          Hindawi Limited

          London, United Kingdom

          Publication History

          Accepted: 24 February 2009
          Published: 01 January 2009
          Received: 07 October 2008

          Qualifiers

          • Article

          Contributors

          Other Metrics

          Bibliometrics & Citations

          Bibliometrics

          Article Metrics

          • 0
            Total Citations
          • 130
            Total Downloads
          • Downloads (Last 12 months)35
          • Downloads (Last 6 weeks)5
          Reflects downloads up to 14 Feb 2025

          Other Metrics

          Citations

          View Options

          View options

          PDF

          View or Download as a PDF file.

          PDF

          eReader

          View online with eReader.

          eReader

          Login options

          Figures

          Tables

          Media

          Share

          Share

          Share this Publication link

          Share on social media