| Project/Area Number |
16K06279
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Electronic materials/Electric materials
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| Research Institution | Osaka Institute of Technology |
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Principal Investigator |
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| Project Period (FY) |
2016-04-01 – 2020-03-31
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| Project Status |
Completed (Fiscal Year 2019)
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| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2018: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2017: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2016: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
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| Keywords | グラフェン / 二硫化モリブデン / 酸化インジウム / ガスセンサ / 電子-正孔パドル / 超伝導 / ファンデルワールスヘテロ接合 / 磁気抵抗 / 弱局在効果 / ラマン散乱 / アルカリ金属 / 電子・電気材料 / 半導体物性 / 原子層薄膜 |
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| Outline of Final Research Achievements |
We made the semiconductor junction consisting of graphene and molybdenum disulfide, which transduces gas-molecules adsorption on the surface and the interface into a change of the resistance. We measured the resistance by flowing hydrogen and NO gases, and confirmed that the resistance of the semiconductor junction was larger than that of single-layer graphene. Furthermore, by increasing the flow rate of the NO gas from 10 ppm through 100 ppm, a step-like change of the resistance was observed, and we confirmed the change of the resistance responded to the flow rate of NO gas. We also evaluated the gas sensing for indium oxide thin film on graphene and observed the increase of resistance by more than two orders, comparing with that of single-layer graphene. We expect the high sensitivity as a gas sensor by using indium oxide thin film on graphene.
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| Academic Significance and Societal Importance of the Research Achievements |
本研究では，グラフェン表面にチタンを蒸着させ，その膜を除去することで，トランジスタの両極性動作に成功した。この研究がグラフェン上に様々な異種材料を積層させて研究を始める契機となった。さらに，グラフェンと二硫化モリブデンとを組み合わせたデバイスを実現し，100 ppm以下の濃度でNOガスの連続モニタリングに成功し，数十秒の応答速度が得ることができた。このような原子層薄膜表面の化学的な変化を電気信号に変換して計測することができるポテンショメトリックセンサーが，リアルタイムで化学種の吸着をモニタリングするための新デバイスに発展することを期待する。
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