DC Field | Value | Language |
---|---|---|
dc.contributor.author | Kim, Hae-Ryong | ko |
dc.contributor.author | Haensch, Alexander | ko |
dc.contributor.author | Kim, Il-Doo | ko |
dc.contributor.author | Barsan, Nicolae | ko |
dc.contributor.author | Weimar, Udo | ko |
dc.contributor.author | Lee, Jong-Heun | ko |
dc.date.accessioned | 2013-03-12T00:24:57Z | - |
dc.date.available | 2013-03-12T00:24:57Z | - |
dc.date.created | 2012-02-06 | - |
dc.date.created | 2012-02-06 | - |
dc.date.issued | 2011-12 | - |
dc.identifier.citation | ADVANCED FUNCTIONAL MATERIALS, v.21, no.23, pp.4456 - 4463 | - |
dc.identifier.issn | 1616-301X | - |
dc.identifier.uri | http://hdl.handle.net/10203/100816 | - |
dc.description.abstract | The humidity dependence of the gas-sensing characteristics in SnO2-based sensors, one of the greatest obstacles in gas-sensor applications, is reduced to a negligible level by NiO doping. In a dry atmosphere, undoped hierarchical SnO2 nanostructures prepared by the self-assembly of crystalline nanosheets show a high CO response and a rapid response speed. However, the gas response, response/recovery speeds, and resistance in air are deteriorated or changed significantly in a humid atmosphere. When hierarchical SnO2 nanostructures are doped with 0.641.27 wt% NiO, all of the gas-sensing characteristics remain similar, even after changing the atmosphere from a dry to wet one. According to diffuse-reflectance Fourier transform IR measurements, it is found that the most of the water-driven species are predominantly absorbed not by the SnO2 but by the NiO, and thus the electrochemical interaction between the humidity and the SnO2 sensor surface is totally blocked. NiO-doped hierarchical SnO2 sensors exhibit an exceptionally fast response speed (1.6 s), a fast recovery speed (2.8 s) and a superior gas response (Ra/Rg = 2.8 at 50 ppm CO (Ra: resistance in air, Rg: resistance in gas)) even in a 25% r.h. atmosphere. The doping of hierarchical SnO2 nanostructures with NiO is a very-promising approach to reduce the dependence of the gas-sensing characteristics on humidity without sacrificing the high gas response, the ultrafast response and the ultrafast recovery. | - |
dc.language | English | - |
dc.publisher | WILEY-BLACKWELL | - |
dc.subject | THIN-FILMS | - |
dc.subject | OXIDE | - |
dc.subject | SNO2 | - |
dc.subject | SURFACE | - |
dc.title | The Role of NiO Doping in Reducing the Impact of Humidity on the Performance of SnO2-Based Gas Sensors: Synthesis Strategies, and Phenomenological and Spectroscopic Studies | - |
dc.type | Article | - |
dc.identifier.wosid | 000297501000008 | - |
dc.identifier.scopusid | 2-s2.0-82555171568 | - |
dc.type.rims | ART | - |
dc.citation.volume | 21 | - |
dc.citation.issue | 23 | - |
dc.citation.beginningpage | 4456 | - |
dc.citation.endingpage | 4463 | - |
dc.citation.publicationname | ADVANCED FUNCTIONAL MATERIALS | - |
dc.contributor.localauthor | Kim, Il-Doo | - |
dc.contributor.nonIdAuthor | Kim, Hae-Ryong | - |
dc.contributor.nonIdAuthor | Haensch, Alexander | - |
dc.contributor.nonIdAuthor | Barsan, Nicolae | - |
dc.contributor.nonIdAuthor | Weimar, Udo | - |
dc.contributor.nonIdAuthor | Lee, Jong-Heun | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | gas sensors | - |
dc.subject.keywordAuthor | humidity | - |
dc.subject.keywordAuthor | SnO2 | - |
dc.subject.keywordAuthor | NiO | - |
dc.subject.keywordAuthor | response | - |
dc.subject.keywordAuthor | recovery speed | - |
dc.subject.keywordPlus | THIN-FILMS | - |
dc.subject.keywordPlus | OXIDE | - |
dc.subject.keywordPlus | SNO2 | - |
dc.subject.keywordPlus | SURFACE | - |
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