Gas sensing using Tri-metal oxides for breathe analysis

International Conference on Materials Engineering and Science

Othman, F.M.^1 ; Abdul-Hamead, A.A.^1 ; Aljanabi, Z.A.^1

Materials Engineering Departments, University of Technology, Baghdad, Iraq^1

关键词: Breath analysis;    Chemical spray pyrolysis;    Detection device;    Disease diagnosis;    Gas sensing properties;    Metal oxide film;    Metal oxides;    Semiconductor gas sensors;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/454/1/012060/pdf
DOI  :  10.1088/1757-899X/454/1/012060

来源: IOP

【 摘 要 】

This article describes the use of a semiconductor gas sensor for disease diagnosis that may potentially serve as diagnostic tool handheld breath analyzer to provide detection device. Tri metal oxides were fabricated by a modified chemical spray pyrolysis technique by the mixing of tungsten and tin salts composition at (1:1, 3:1) respectively, with a concentration of (0.1M). The substrate used was silicon n-type at a temperature (500 °C ±5), with spray distance (25 cm). Structural properties, including x-ray diffraction XRD, scanning electron microscopy SEM and atomic force microscopy AFM, were examined. Moreover, the gas sensing property toward nitrous oxide NO2 gas at a concentration of (10) ppm in air was investigated. Experimental results show formation of tri-metal oxide film (α-SnWO4) with wire and rods structures were achieved from the used salts, which make the sensor suitable for the detection of nitrous oxide levels in the exhaled human breath.