Abstract
The development of a suitable sensing material for a high-sensitivity detection method for ethylene is needed to enhance the efficiency of estimating the life expectancy of agricultural products. A novel sensor for ethylene gas comprised of a polyaniline/multiwall carbon nanotube/tin oxide nanoparticle (PANi/MWCNT/SnO2NP) was successfully synthesized by electrophoretic deposition of SnO2NPs onto a gold interdigited substrate and then chronoamperometric deposition of the PANi/MWCNT film from an aniline/MWCNT solution. The sensitivity of the PANi/MWCNT/SnO2NP composite sensor was found to be almost linearly dependent on the concentration of ethylene gas in the parts per million range, with an ethylene-sensitivity of 10 ppm and a gas-sensitivity of 2.42%.
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