2019 Fiscal Year Research-status Report
Highly-accurate and self-powered environmental sensor based on integrated graphene NEMS-nano particles with signal amplification
| Project/Area Number |
18K04260
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| Research Institution | Japan Advanced Institute of Science and Technology |
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Principal Investigator |
MURUGANATH AN.M 北陸先端科学技術大学院大学, 先端科学技術研究科, 講師 (20639322)
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| Project Period (FY) |
2018-04-01 – 2021-03-31
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| Keywords | Graphene / Ammonia / Charge neutrality point |
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| Outline of Annual Research Achievements |
We have devised a method to distinguish various gas via the tuning voltage induced charge transfer characteristics. The experimental procedure involved iterative determinations of the difference in the charge neutrality point of graphene in a particular gas environment at two constant tuning voltages applied separately to the gate. This charge neutrality point difference was observed in various environments: dry air, 100% N2 and 100% O2, Ammonia/N2, and (84 ppm, 5ppb) Ammonia/Real Air, and shown to be characteristic of each environment. Additionally, a quasi-equilibrium distribution of adsorbed gases on graphene as a function of ambient temperature and pressure was also observed.
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| Current Status of Research Progress |
Current Status of Research Progress
1: Research has progressed more than it was originally planned.
Reason
We are carrying out different and detailed measurements of graphene sensors. Our first-principles simulation also helps to understand the microscopic details of sensing characteristics.
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| Strategy for Future Research Activity |
In the next phase of work, we are going to do Acetone and Ethanol sensing. In order to improve sensing, we will find out a better graphene coating material. Moreover, atomistic simulations will be carried out to understand the details of sensing mechanism.
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