Synthesis and Fabrication of ZnO Nanorods on Silicon for Methanol Gas Sensor

  • Abdulqader Dawood Faisal
  • Mofeed Abdul Latif Jaleel
  • Fahad Zaher Kamal

Abstract

Zinc Oxide nanorods (ZnO NRs) were successfully synthesized via hydrothermal method. The growth process was conducted with seed layer concentration of 30 mM. The as-synthesized nanostructures were characterized by x-ray diffraction (XRD), scanning electron microscope (SEM), atomic force microscope (AFM), and ultraviolet-visible (UV-VIS) spectrophotometer. The analysis results revealed a pure Wurtzite ZnO hexagonal nanostructures with preferred orientation (002) along c-direction. The calculated band gap and crystallite size are 3.2 eV and 53.18 nm respectively.  A methanol gas sensor was fabricated based on the annealed ZnO NRs on the silicon substrate. Optimized sensitivity at 250 ppm methanol vapor with fast response and recovery time was achieved. So, ZnO NRs film can serve as a good candidate for a methanol gas sensing device.

Author Biographies

Abdulqader Dawood Faisal
University of Technoloy, Applied Sciences Department, Applied Sciences Research Unit.
Mofeed Abdul Latif Jaleel
University of Technoloy, Applied Sciences Department, Materials Science.
Fahad Zaher Kamal
University of Technoloy, Applied Sciences Department, Materials Science.
Published
2019-10-25
How to Cite
Faisal, A. D., Jaleel, M. A. L., & Kamal, F. Z. (2019). Synthesis and Fabrication of ZnO Nanorods on Silicon for Methanol Gas Sensor. Engineering and Technology Journal, 37(3 B), 74-81. Retrieved from http://engtechjournal.org/index.php/et/article/view/173