Skip to main content
×
×
Home

Low Cost Environmental Sensors Using Zinc Oxide Nanowires and Nanostructures

  • Nima Mohseni Kiasari (a1), Saeid Soltanian (a1), Bobak Gholamkhass (a1) and Peyman Servati (a1)
Abstract
ABSTRACT

Zinc oxide (ZnO) nanowires (NW) are grown on both silicon and sapphire substrates using conventional chemical vapor deposition (CVD) system. As-grown nanostructures are characterized by scanning electron microscope (SEM), X-ray diffraction (XRD) as well as energy dispersive spectroscopy (EDS) and the results confirm high-quality c-axis growth of single-crystalline zinc oxide nanowires. Nanowire are dispersed in solvent and then placed between micro-patterned gold electrodes fabricated on silicon wafers using low cost and scalable dielectrophoresis (DEP) process for fabrication of oxygen and humidity sensors. These sensors are characterized in a vacuum chamber connected to a semiconductor analyzer. Current-voltage characteristics of each device are systematically investigated under different hydrostatic pressure of various gaseous environments such as nitrogen, argon, dry and humid air. It is observed that the electrical conductivity of the nanowires is significantly dependent on the number of oxygen and water molecules adsorbed to the surface of the metal oxide nanowire. These results are critical for development of low cost metal oxide sensors for high performance ubiquitous environmental sensors of oxygen and humidity.

Copyright
References
Hide All
[1] Mohseni Kiasari N. and Servati P., “Dielectrophoresis-Assembled ZnO Nanowire Oxygen Sensors,” Electron Device Letters, IEEE, pp. 13, 2011.
[2] Fan Z., Wang D., Chang P. C., Tseng W. Y., and Lu J. G., “ZnO nanowire field-effect transistor and oxygen sensing property,” Applied Physics Letters, vol. 85, pp. 59235925, 2004.
[3] Gholamkhass B., Kiasari N. M., and Servati P., “An efficient inverted organic solar cell with improved ZnO and gold contact layers,” Organic Electronics, 2012.
[4] Kiasari N. M., Shen J., Gholamkhass B., Soltanian S., and Servati P., “Well-aligned zinc oxide nanowire arrays for transparent electrode applications,” in Photonics Conference (PHO), 2011 IEEE, 2011, pp. 561562.
[5] Wang Z. L. and Song J., “Piezoelectric nanogenerators based on zinc oxide nanowire arrays,” Science, vol. 312, pp. 242246, 2006.
[6] Comini E., “Metal oxide nano-crystals for gas sensing,” Analytica Chimica Acta, vol. 568, pp. 2840, 2006.
[7] Wang Z. L., “Zinc oxide nanostructures: growth, properties and applications,” Journal of Physics: Condensed Matter, vol. 16, p. R829, 2004.
[8] Liu B. and Zeng H. C., “Hydrothermal synthesis of ZnO nanorods in the diameter regime of 50 nm,” Journal of the American Chemical Society, vol. 125, pp. 44304431, 2003.
[9] Kong Y., Yu D., Zhang B., Fang W., and Feng S., “Ultraviolet-emitting ZnO nanowires synthesized by a physical vapor deposition approach,” Applied Physics Letters, vol. 78, p. 407, 2001.
[10] Hartanto A., Ning X., Nakata Y., and Okada T., “Growth mechanism of ZnO nanorods from nanoparticles formed in a laser ablation plume,” Applied Physics A: Materials Science & Processing, vol. 78, pp. 299301, 2004.
[11] Gondrand C., Laurent J., Pauchet J., Prat M., Quintard M., Rouillon L., and Tafforeau P., “Characterization of polymer electrolyte fuel cell (PEFC) active layer and experimental study of the water behaviour in a micro fuel cell,” Fuel cells, vol. 2, p. 4.
[12] Freer E. M., Grachev O., Duan X., Martin S., and Stumbo D. P., “High-yield self-limiting single-nanowire assembly with dielectrophoresis,” Nature nanotechnology, vol. 5, pp. 525530, 2010.
[13] TAKATA M., TSUBONE D., and YANAGIDA H., “Dependence of electrical conductivity of ZnO on degree of sintering,” Journal of the American Ceramic Society, vol. 59, pp. 48, 1976.
[14] Advani G. N. and Nanis L., “Effects of humidity on hydrogen sulfide detection by SnO2 solid state gas sensors,” Sensors and Actuators, vol. 2, pp. 201206, 1982.
[15] Chang S. P., Chang S. J., Lu C. Y., Li M. J., Hsu C. L., Chiou Y. Z., Hsueh T. J., and Chen I., “A ZnO nanowire-based humidity sensor,” Superlattices and Microstructures, vol. 47, pp. 772778, 2010.
[16] Chen Z. and Lu C., “Humidity sensors: a review of materials and mechanisms,” Sensor Letters, vol. 3, pp. 274295, 2005.
[17] Wu R. J., Sun Y. L., Lin C. C., Chen H. W., and Chavali M., “Composite of TiO2 nanowires and nafion as humidity sensor material,” Sensors and Actuators B: Chemical, vol. 115, pp. 198204, 2006.
[18] Kuang Q., Lao C., Wang Z. L., Xie Z., and Zheng L., “High-sensitivity humidity sensor based on a single SnO2 nanowire,” Journal of the American Chemical Society, vol. 129, pp. 60706071, 2007.
Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

MRS Online Proceedings Library (OPL)
  • ISSN: -
  • EISSN: 1946-4274
  • URL: /core/journals/mrs-online-proceedings-library-archive
Please enter your name
Please enter a valid email address
Who would you like to send this to? *
×

Keywords:

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 3 *
Loading metrics...

Abstract views

Total abstract views: 94 *
Loading metrics...

* Views captured on Cambridge Core between September 2016 - 22nd January 2018. This data will be updated every 24 hours.