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Volume 12
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10.3390/s120302598
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Article

Investigation of the Carbon Monoxide Gas Sensing Characteristics of Tin Oxide Mixed Cerium Oxide Thin Films

by
Sardar M. A. Durrani
*,
Mohammad F. Al-Kuhaili
,
Imran A. Bakhtiari
and
Muhammad B. Haider
Physics Department, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
*
Author to whom correspondence should be addressed.
Sensors 2012, 12(3), 2598-2609; https://doi.org/10.3390/s120302598
Submission received: 6 January 2012 / Revised: 11 February 2012 / Accepted: 16 February 2012 / Published: 27 February 2012
(This article belongs to the Special Issue Sensing at the Nano-Scale: Chemical and Bio-Sensing)
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Abstract

Thin films of tin oxide mixed cerium oxide were grown on unheated substrates by physical vapor deposition. The films were annealed in air at 500 °C for two hours, and were characterized using X-ray photoelectron spectroscopy, atomic force microscopy and optical spectrophotometry. X-ray photoelectron spectroscopy and atomic force microscopy results reveal that the films were highly porous and porosity of our films was found to be in the range of 11.6–21.7%. The films were investigated for the detection of carbon monoxide, and were found to be highly sensitive. We found that 430 °C was the optimum operating temperature for sensing CO gas at concentrations as low as 5 ppm. Our sensors exhibited fast response and recovery times of 26 s and 30 s, respectively.
Keywords: thin film; AFM; XPS; CeO2; SnO2; CO sensor; semiconductor gas sensor thin film; AFM; XPS; CeO2; SnO2; CO sensor; semiconductor gas sensor
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MDPI and ACS Style

Durrani, S.M.A.; Al-Kuhaili, M.F.; Bakhtiari, I.A.; Haider, M.B. Investigation of the Carbon Monoxide Gas Sensing Characteristics of Tin Oxide Mixed Cerium Oxide Thin Films. Sensors 2012, 12, 2598-2609. https://doi.org/10.3390/s120302598

AMA Style

Durrani SMA, Al-Kuhaili MF, Bakhtiari IA, Haider MB. Investigation of the Carbon Monoxide Gas Sensing Characteristics of Tin Oxide Mixed Cerium Oxide Thin Films. Sensors. 2012; 12(3):2598-2609. https://doi.org/10.3390/s120302598

Chicago/Turabian Style

Durrani, Sardar M. A., Mohammad F. Al-Kuhaili, Imran A. Bakhtiari, and Muhammad B. Haider. 2012. "Investigation of the Carbon Monoxide Gas Sensing Characteristics of Tin Oxide Mixed Cerium Oxide Thin Films" Sensors 12, no. 3: 2598-2609. https://doi.org/10.3390/s120302598

APA Style

Durrani, S. M. A., Al-Kuhaili, M. F., Bakhtiari, I. A., & Haider, M. B. (2012). Investigation of the Carbon Monoxide Gas Sensing Characteristics of Tin Oxide Mixed Cerium Oxide Thin Films. Sensors, 12(3), 2598-2609. https://doi.org/10.3390/s120302598

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