2002 Fiscal Year Final Research Report Summary
Materials Design for Molecular Recognition Devices using Nano-space between tow Oxide Semiconductor Crystals
| Project/Area Number |
13650878
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
工業物理化学
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| Research Institution | The University of Tokyo |
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Principal Investigator |
NAKAMURA Yoshinobu The University of Tokyo, Graduate School of Engineering, Research Associate, 大学院・工学系研究科, 助手 (30198254)
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| Project Period (FY) |
2001 – 2002
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| Keywords | STM / copper oxide / zinc oxide / enzyme / nano-space / alcohol / molecular recognition / チューニング |
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| Research Abstract |
By using the STM system, structurally well-controlled CuO-ZnO "open junction" (tunnel junction) is prepared and the effect of the crystal axis orientation relationship at the junction interface on its alcohol sensing properties is discussed. The CuO-ZnO tunnel junctions have atmosphere sensitive electrical properties even at room temperature. When a CuO tip and Zn-terminated polar surface of ZnO (ZnO (Zn-face)) are chosen for making the tunnel junction, the obtained CuO-ZnO(Zn-face) junction shows highly rectifying characters, where CuO-ZnO(O-face) shows not so good rectifying character. Only the CuO-ZnO(Zn-face) tunnel junction shows a pronounced ethanol sensing characteristics. The catalytic active surface of ZnO(Zn-face) would play an important role for the alcohol sensing characteristics of the CuO-ZnO tunnel junction. Through the current studies on the electrical characterization of the tunnel junction between CuO and ZnO, it is appeared that a structurally well-controlled "open interface" having nano-space between two crystals will be appropriate for the chemical sensor elements, which have an ability of molecular recognition.
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