2007 Fiscal Year Final Research Report Summary
Semiconductor gas sensors based on hetero-cluster particles for VOC detection in ppb level
| Project/Area Number |
18350075
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Functional materials chemistry
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| Research Institution | Kyushu University |
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Principal Investigator |
SHIMANOE Kengo Kyushu University, Faculty of Engineering Sciences, Professor (10274531)
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| Co-Investigator(Kenkyū-buntansha) |
KIDA Tatsuya Kyushu University, Faculty of Engineering Sciences, Associate Professor (70363421)
YUASA Masayoshi Kyushu University, Faculty of Engineering Sciences, Assistant Professor (50404075)
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| Project Period (FY) |
2006 – 2007
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| Keywords | Gas sensor / Semiconductor / Structure control / Cluster / Gas diffusion / VOC / Thin film / Nanoparticle |
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| Research Abstract |
Various kinds of gas sensors have been developed or proposed and some of them have been recognized as key devices to monitor, handle or control of gases for various purposes. In this study, importance of structure control in nano- and meso-level for high-sensitive semiconductor gas sensor to VOCs, which are large size molecules, was indicated through brief effects by receptor function, transducer function and utility factor. For receptor function, it was challenged to load each colloidal particle of SnO_2 with foreign metal like Pd by a reverse micelle method and a surface modification method for surface modification. It was found that the particle size of PdO on SnO_2 nano-particle influences the gas sensing property closely. Small amount of PdO loading can be achieved as compared with PdO-loaded SnO_2 sensor prepared by the conventional impregnation method. For transducer function, doping each particle with other oxides for valence control was also challenged. We investigated the eff
… More
ects of Fe^3^+ doping in SnO_2 on the crystalline size, electric resistance, and sensor response. The Fe^3+ doping was found to decrease the carrier concentration and crystalline size. The dependence of electrical resistance on oxygen partial pressure and the sensor response to H_2are well explained in terms of the proposed theory. For utility factor, by increasing pore size through an increase in grain size and introducing macropores through forming small clusters (secondary particles) of grains, the target gas reacts with the oxide surface on its way of diffusion into the sensor device. The prepared SnO_2cluster sols were useful for fabrication of thin film type gas sensor including the microstructure with larger pores. From the sensing properties, it was found that such cluster sols have high potentiality as a precursor solution to prepare high order structure controlled devices for high performance. In order to develop high-sensitive gas sensors, it was expressed that the three key factors should be fused together in one sensor device. Less
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[Journal Article] Micro structure control and gas sensing characteristics of TiO_2 based gas sensors2008
Author(s)
M.-H., Seo, M., Yuasa, T., Kida, J.-S., Huh, K., Shimanoe, N., Yamazoe
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Journal Title
Chemical Sensors 24, A
Pages: 22-24
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Sensing performances of SnO_2 semiconductor gas sensor loading PdO by reverse micelle method2007
Author(s)
M., Yuasa, T., Masaki, T., Kida, K., Shimanoe, N., Yamazoe
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Journal Title
Chemical Sensors 23, B
Pages: 4-6
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Investigation on loading methods for PdO-SnO_2 nanoparticle gas sensor2007
Author(s)
H., Kurachi, T., Masaki, M., Yuasa, T., Kida, N., Yamazoe
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Journal Title
Proc. of the 9th. Cross Straits Symposium on Materials, Energy and Environmental Engineering
Pages: 86-88
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Micro structure control and gas sensing characteristics of TiO_2 based gas sensors2008
Author(s)
M.-H., Seo, M., Yuasa, T., Kida, J.-S., Huh, K., Shimanoe, N., Yamazoe
Organizer
45th Chemical Sensor Symposium
Place of Presentation
University of Yamanashi
Year and Date
2008-03-29
Description
「研究成果報告書概要(欧文)」より
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[Presentation] 半導体ガスセンサの材料設計2008
Author(s)
島ノ江 憲剛, ら
Organizer
第2回安全・安心を見守るセンサ材料・技術の進展
Place of Presentation
化学会館
Year and Date
2008-03-12
Description
「研究成果報告書概要(和文)」より
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[Presentation] Investigation on loading methods for PdO-SnO_2 nanoparticle gas sensor
Author(s)
H., Kurachi, T., Masaki, M., Yuasa, T., Kida, K., Shimanoe, N., Yamazoe
Organizer
9th Cross Straits Symposium on Materials, Energy and Environmental Engineering
Place of Presentation
POSTECH(Phohang, Korea)
Description
「研究成果報告書概要(欧文)」より
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