| Project/Area Number |
24241025
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Environmental technology/Environmental materials
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| Research Institution | Kochi University of Technology |
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Principal Investigator |
YAMAMOTO Tetsuya 高知工科大学, 公私立大学の部局等, 教授 (30320120)
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| Co-Investigator(Kenkyū-buntansha) |
SONG Huaping 高知工科大学, 公私立大学の部局等, 助教 (00611831)
MAKINO Hisao 高知工科大学, 公私立大学の部局等, 准教授 (40302210)
KISHIMOTO Seiichi 高知工業高等専門学校, その他部局等, その他 (90177816)
NOMOTO Junichi 高知工科大学, 公私立大学の部局等, 助教 (30711288)
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| Co-Investigator(Renkei-kenkyūsha) |
KOBAYASHI Keisuke 高知工科大学, 公私立大学の部局等, 客員教授 (50372149)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥26,130,000 (Direct Cost: ¥20,100,000、Indirect Cost: ¥6,030,000)
Fiscal Year 2014: ¥6,630,000 (Direct Cost: ¥5,100,000、Indirect Cost: ¥1,530,000)
Fiscal Year 2013: ¥8,450,000 (Direct Cost: ¥6,500,000、Indirect Cost: ¥1,950,000)
Fiscal Year 2012: ¥11,050,000 (Direct Cost: ¥8,500,000、Indirect Cost: ¥2,550,000)
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| Keywords | グリーンケミストリ / 水素センサー / 半導体センサー / 酸化物半導体 / 酸化亜鉛 / 導電性薄膜 / 半導体式センサー / t90 / 吸着酸素 / peroxide / superoxide / 酸化物半導体式 / 応答時間 / 起動時間 / スーパーオキシドアニオン / 活性酸素 / 化学吸着 / 環境材料 / 表面・界面物性 / 水素 / プラズマ加工 / 電子・電気材料 |
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| Outline of Final Research Achievements |
In this study, we achieved hydrogen gas sensors based on oxide semiconductors which operate at a temperature of 170 ℃; their performance is a response time within almost 1 s with current changes of 0.1 mA. 50-nm-thick conductive ZnO polycrystalline films were used as gas sensing materials. With regard to the operating temperatures, significant reduction in temperature is realized when compared with the prior technologies (the typical temperature is 300 ℃). The value of the response time is found to be very short, compared to that of conventional semiconductor-based sensors, typically 20 s.Note that the feature of the hydrogen gas sensors that have been achieved in this study is applicable to both DC source and AC source (patents application already).
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