2018 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 / Gas sensing |
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| Outline of Annual Research Achievements |
We achieved fast detection of ammonia through the gate voltage modulation of the carrier density of graphene and polarization of the ammonia molecule. Consequently, the change in charge neutrality point and charge-transfer characteristics of the ammonia-graphene system was studied. Furthermore, the results indicate that the fast detection time and shift in the charge neutrality point may be attributed directly to the charge transfer between graphene and ammonia facilitated by gate voltage modulation. For the acetone concentration of 1.48% in nitrogen base gas, charge neutrality point voltage shifted negative and positive voltages for the tuning voltage of -30 V and 30 V, respectively. Amount of charge transfer between nitrogen molecules and graphene depends on the external electric field.
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
Our work is progressing as planned. We worked on different and detailed measurements of ammonia and acetone sensing measurements in real air environment. Our first-principls simulation also helps to understand the atomistics scale sensing characteritics.
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| Strategy for Future Research Activity |
In the next phase of work, we are going to deposit metal nanoparticles for sensing work. We will do more atomistic simulations to understand the details of sensing mechanism. Detailed measurements and simulations works will clarify the role of metal particles in gas molecuels sensing.
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