Thin Film Gas Sensors Based on Planetary Ball-Milled Zinc Oxide Nanoinks: Effect of Milling Parameters on Sensing Performance

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dc.contributor.authorSapkota, Raju
dc.contributor.authorDuan, Pengjun
dc.contributor.authorKumar, Tanay
dc.contributor.authorVenkataraman, Anusha
dc.contributor.authorPapadopoulos, Chris
dc.date.accessioned2021-11-01T18:00:32Z
dc.date.available2021-11-01T18:00:32Z
dc.date.copyright2021en_US
dc.date.issued2021
dc.descriptionWe thank Sahil Dawka for assisting with sample fabrication; the UBC Bioimaging Facility for SEM, EDX, and PL spectroscopy; and Western Economic Diversification Canada and A.G Brolo for Raman spectroscopy. T. Kumar was supported by the MITACS Globalink program.en_US
dc.description.abstractPlanetary ball-milled zinc oxide (ZnO) nanoparticle suspensions (nanoinks) were used to produce thin film chemiresistive gas sensors that operate at room temperature. By varying milling or grinding parameters (speed, time, and solvent) different thin film gas sensors with tunable particle sizes and porosity were fabricated and tested with dry air/oxygen against hydrogen, argon, and methane target species, in addition to relative humidity, under ambient light conditions. Grinding speeds of up to 1000 rpm produced particle sizes and RMS thin film roughness below 100 nm, as measured by atomic force and scanning electron microscopy. Raman spectroscopy, photoluminescence, and X-ray analysis confirmed the purity and structure of the resulting ZnO nanoparticles. Gas sensor response at room temperature was found to peak for nanoinks milled at 400 rpm and for 30 min in ethylene glycol and deionized water, which could be correlated to an increased film porosity and enhanced variation in electron concentration resulting from adsorption/desorption of oxygen ions on the surfaces of ZnO nanoparticles. Sensor response and dynamic behavior was found to improve as the temperature was increased, peaking between 100 and 150 C. This work demonstrates the use of low-cost PBM nanoinks as the active materials for solution-processed thin film gas/humidity sensors for use in environmental, medical, food packaging, laboratory, and industrial applications.en_US
dc.description.reviewstatusRevieweden_US
dc.description.scholarlevelFacultyen_US
dc.description.sponsorshipThis work was funded in part by Natural Sciences and Engineering Research Council of Canada and the Canada Foundation for Innovation.en_US
dc.identifier.citationSapkota, R., Duan, P., Kumar, T., Venkataraman, A., & Papadopoulos, C. (2021). Thin film gas sensors based on planetary ball-milled zinc oxide nanoinks: Effect of milling parameters on sensing performance. applied sciences, 11(9676), 1-17. https://doi.org/10.3390/app11209676en_US
dc.identifier.urihttps://doi.org/10.3390/app11209676
dc.identifier.urihttp://hdl.handle.net/1828/13474
dc.language.isoenen_US
dc.publisherapplied sciencesen_US
dc.subjectZnOen_US
dc.subjectnanoparticlesen_US
dc.subjectplanetary ball millingen_US
dc.subjectgas sensoren_US
dc.subjectthin filmsen_US
dc.subjectnanoinken_US
dc.titleThin Film Gas Sensors Based on Planetary Ball-Milled Zinc Oxide Nanoinks: Effect of Milling Parameters on Sensing Performanceen_US
dc.typeArticleen_US

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