Au@NiO core-shell nanoparticles as a p-type gas sensor: Novel synthesis, characterization, and their gas sensing properties with sensing mechanism
DC Field | Value | Language |
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dc.contributor.author | Majhi, Sanjit Manohar | - |
dc.contributor.author | Naik, Gautam Kumar | - |
dc.contributor.author | Lee, Hu-Jun | - |
dc.contributor.author | Song, Ho-Geun | - |
dc.contributor.author | Lee, Cheul-Ro | - |
dc.contributor.author | Lee, In-Hwan | - |
dc.contributor.author | Yu, Yeon-Tae | - |
dc.date.accessioned | 2021-09-02T06:31:29Z | - |
dc.date.available | 2021-09-02T06:31:29Z | - |
dc.date.created | 2021-06-16 | - |
dc.date.issued | 2018-09-01 | - |
dc.identifier.issn | 0925-4005 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/73147 | - |
dc.description.abstract | In this work, Au@NiO core-shell nanoparticles (C-S NPs) as a p-type gas sensing material was synthesized by a facile wet-chemical method, and evaluated their gas sensing properties as compared to the pristine NiO NPs gas sensors. Transmission electron microscope (TEM) results exhibited the well-dispersed formation of Au@NiO C-S NPs having the total size of 70-120 nm and NiO shells having 30-50 nm thickness. The C-S morphology as well as the overall particle sizes are unchanged even at 500 degrees C. The gas sensing result reveals that the response of Au@NiO C-S NPs gas sensor is higher than pristine NiO NPs gas sensor for 100 ppm of ethanol at 200 degrees C operating temperature. The baseline resistance in the air for Au@NiO C-S NPs sensor is lowered as compared to pristine NiO NPs, which is due to the increased number of holes as charge carriers in Au@NiO C-S NPs. The high response of Au@NiO core-shell NPs as compared to pristine NiO NPs is attributed to electronic and chemical sensitization effects of Au. In Au@NiO C-S structure, the contact between metal (Au) and semiconductor (NiO) formed a Schottky junction since Au metal acted as electron acceptor, a withdrawal of electrons from NiO by Au metal core leaved behind number of holes as charge carriers in Au@NiO C-S NPs. Therefore, the baseline resistance of Au@NiO C-S NPs greatly decreased than pristine NiO NPs, as a result the Au@NiO C-S NPs showed higher response. On the other hand, in chemical sensitization effect, Au NPs catalyzed to dissociate O-2 molecules into ionic species. This work will give some clue to the researchers for the further development of p-type based C-S NPs sensors. (c) 2018 Elsevier B.V. All rights reserved. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | ELSEVIER SCIENCE SA | - |
dc.subject | METAL-ORGANIC FRAMEWORKS | - |
dc.subject | SELECTIVE DETECTION | - |
dc.subject | SNO2 NANOTUBES | - |
dc.subject | TIN DIOXIDE | - |
dc.subject | NANOSTRUCTURES | - |
dc.subject | PERFORMANCE | - |
dc.subject | CATALYSTS | - |
dc.subject | SURFACE | - |
dc.subject | DESIGN | - |
dc.subject | AG | - |
dc.title | Au@NiO core-shell nanoparticles as a p-type gas sensor: Novel synthesis, characterization, and their gas sensing properties with sensing mechanism | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Lee, In-Hwan | - |
dc.identifier.doi | 10.1016/j.snb.2018.04.119 | - |
dc.identifier.scopusid | 2-s2.0-85046438468 | - |
dc.identifier.wosid | 000432776800031 | - |
dc.identifier.bibliographicCitation | SENSORS AND ACTUATORS B-CHEMICAL, v.268, pp.223 - 231 | - |
dc.relation.isPartOf | SENSORS AND ACTUATORS B-CHEMICAL | - |
dc.citation.title | SENSORS AND ACTUATORS B-CHEMICAL | - |
dc.citation.volume | 268 | - |
dc.citation.startPage | 223 | - |
dc.citation.endPage | 231 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Chemistry | - |
dc.relation.journalResearchArea | Electrochemistry | - |
dc.relation.journalResearchArea | Instruments & Instrumentation | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Analytical | - |
dc.relation.journalWebOfScienceCategory | Electrochemistry | - |
dc.relation.journalWebOfScienceCategory | Instruments & Instrumentation | - |
dc.subject.keywordPlus | METAL-ORGANIC FRAMEWORKS | - |
dc.subject.keywordPlus | SELECTIVE DETECTION | - |
dc.subject.keywordPlus | SNO2 NANOTUBES | - |
dc.subject.keywordPlus | TIN DIOXIDE | - |
dc.subject.keywordPlus | NANOSTRUCTURES | - |
dc.subject.keywordPlus | PERFORMANCE | - |
dc.subject.keywordPlus | CATALYSTS | - |
dc.subject.keywordPlus | SURFACE | - |
dc.subject.keywordPlus | DESIGN | - |
dc.subject.keywordPlus | AG | - |
dc.subject.keywordAuthor | Au@NiO | - |
dc.subject.keywordAuthor | Core-shell NPs | - |
dc.subject.keywordAuthor | Baseline resistance | - |
dc.subject.keywordAuthor | Sensitivity | - |
dc.subject.keywordAuthor | M@p-MOS | - |
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