Improvement of flame-made ZnO nanoparticulate thick film morphology for ethanol sensing
ZnO nanoparticles were produced by flame spray pyrolysis using zinc naphthenate as a precursor dissolved in toluene/acetonitrile (80/20 vol%). The particles properties were analyzed by XRD, BET. The ZnO particle size and morphology was observed by SEM and HR-TEM revealing spheroidal, hexagonal, and...
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th-cmuir.6653943832-609312018-09-10T04:11:01Z Improvement of flame-made ZnO nanoparticulate thick film morphology for ethanol sensing Chaikarn Liewhiran Sukon Phanichphant Biochemistry, Genetics and Molecular Biology Chemistry Engineering Physics and Astronomy ZnO nanoparticles were produced by flame spray pyrolysis using zinc naphthenate as a precursor dissolved in toluene/acetonitrile (80/20 vol%). The particles properties were analyzed by XRD, BET. The ZnO particle size and morphology was observed by SEM and HR-TEM revealing spheroidal, hexagonal, and rod-like morphologies. The crystallite sizes of ZnO spheroidal and hexagonal particles ranged from 10-20 nm. ZnO nanorods were ranged from 10-20 nm in width and 20-50 nm in length. Sensing films were produced by mixing the nanoparticles into an organic paste composed of terpineol and ethyl cellulose as a vehicle binder. The paste was doctor-bladed onto Al2O3substrates interdigitated with Au electrodes. The morphology of the sensing films was analyzed by optical microscopy and SEM analysis. Cracking of the sensing films during annealing process was improved by varying the heating conditions. The gas sensing of ethanol (25-250 ppm) was studied at 400°C in dry air containing SiC as the fluidized particles. The oxidation of ethanol on the surface of the semiconductor was confirmed by mass spectroscopy (MS). The effect of micro-cracks was quantitatively accounted for as a provider of extra exposed edges. The sensitivity decreased notably with increasing crack of sensing films. It can be observed that crack widths were reduced with decreasing heating rates. Crack-free of thick (5-äm) ZnO films evidently showed higher sensor signal and faster response times (within seconds) than cracked sensor. The sensor signal increased and the response time decreased with increasing ethanol concentration. © 2007 by MDPI. 2018-09-10T04:01:28Z 2018-09-10T04:01:28Z 2007-01-01 Journal 14248220 14243210 2-s2.0-34249869059 10.3390/s7050650 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=34249869059&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/60931 |
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Biochemistry, Genetics and Molecular Biology Chemistry Engineering Physics and Astronomy Chaikarn Liewhiran Sukon Phanichphant Improvement of flame-made ZnO nanoparticulate thick film morphology for ethanol sensing |
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ZnO nanoparticles were produced by flame spray pyrolysis using zinc naphthenate as a precursor dissolved in toluene/acetonitrile (80/20 vol%). The particles properties were analyzed by XRD, BET. The ZnO particle size and morphology was observed by SEM and HR-TEM revealing spheroidal, hexagonal, and rod-like morphologies. The crystallite sizes of ZnO spheroidal and hexagonal particles ranged from 10-20 nm. ZnO nanorods were ranged from 10-20 nm in width and 20-50 nm in length. Sensing films were produced by mixing the nanoparticles into an organic paste composed of terpineol and ethyl cellulose as a vehicle binder. The paste was doctor-bladed onto Al2O3substrates interdigitated with Au electrodes. The morphology of the sensing films was analyzed by optical microscopy and SEM analysis. Cracking of the sensing films during annealing process was improved by varying the heating conditions. The gas sensing of ethanol (25-250 ppm) was studied at 400°C in dry air containing SiC as the fluidized particles. The oxidation of ethanol on the surface of the semiconductor was confirmed by mass spectroscopy (MS). The effect of micro-cracks was quantitatively accounted for as a provider of extra exposed edges. The sensitivity decreased notably with increasing crack of sensing films. It can be observed that crack widths were reduced with decreasing heating rates. Crack-free of thick (5-äm) ZnO films evidently showed higher sensor signal and faster response times (within seconds) than cracked sensor. The sensor signal increased and the response time decreased with increasing ethanol concentration. © 2007 by MDPI. |
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Chaikarn Liewhiran Sukon Phanichphant |
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Chaikarn Liewhiran Sukon Phanichphant |
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Chaikarn Liewhiran |
title |
Improvement of flame-made ZnO nanoparticulate thick film morphology for ethanol sensing |
title_short |
Improvement of flame-made ZnO nanoparticulate thick film morphology for ethanol sensing |
title_full |
Improvement of flame-made ZnO nanoparticulate thick film morphology for ethanol sensing |
title_fullStr |
Improvement of flame-made ZnO nanoparticulate thick film morphology for ethanol sensing |
title_full_unstemmed |
Improvement of flame-made ZnO nanoparticulate thick film morphology for ethanol sensing |
title_sort |
improvement of flame-made zno nanoparticulate thick film morphology for ethanol sensing |
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2018 |
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https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=34249869059&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/60931 |
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