Ammonia Gas Detection Using Fabricated Zinc Oxide (ZnO) Nanoparticles on Glass Tube Substrates

Kurt Brian Daine B. Punzalan; Franz Kevin B. Manalo; Emmanuel A. Florido

doi:10.4028/www.scientific.net/KEM.775.266

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Ammonia Gas Detection Using Fabricated Zinc Oxide (ZnO) Nanoparticles on Glass Tube Substrates

Abstract:

This study aimed to determine the ammonia (NH₃) gas sensing ability of zinc oxide (ZnO) films deposited on glass tube substrates via successive ionic layer adsorption and reaction (SILAR) technique. The fabricated films were annealed at different temperatures. The sensor films were exposed to different volumes of ammonium hydroxide (NH₄OH), converted to parts per million (ppm). The change in voltage from concentrations 595ppm up to 1189ppm exhibited a linear trend. However, no trend was revealed in concentrations 2378ppm and 3964ppm due to film saturation. Results showed that the films annealed at 250 °C, 300 °C, 350 °C, and 400 °C presented sensitivities of 2.7×10^-4V/ppm, 1.0×10^-4V/ppm, 2.3×10^-4V/ppm, and 1.5×10^-4V/ppm with R² values of 0.997, 0.994, 0.904, 0.999 and resolutions of 3.7 ppm/mV, 9.9 ppm/mV, 4.4 ppm/mV, and 6.6 ppm/mV, respectively. Furthermore, this research study had proven that high quality gas sensors may be fabricated at a lower cost.

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Periodical:

Key Engineering Materials (Volume 775)

Pages:

266-271

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.775.266

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Online since:

August 2018

Authors:

Kurt Brian Daine B. Punzalan, Franz Kevin B. Manalo, Emmanuel A. Florido*

Keywords:

Ammonia, Sensitivity, SILAR, Zinc Oxide

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* - Corresponding Author

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