2022 Fiscal Year Final Research Report
Dynamics of nanoscale carbon materials under an electric field
Project/Area Number |
20K22323
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Research Category |
Grant-in-Aid for Research Activity Start-up
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Allocation Type | Multi-year Fund |
Review Section |
0202:Condensed matter physics, plasma science, nuclear engineering, earth resources engineering, energy engineering, and related fields
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Research Institution | University of Tsukuba |
Principal Investigator |
Gao Yanlin 筑波大学, 数理物質系, 助教 (50847051)
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Project Period (FY) |
2020-09-11 – 2023-03-31
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Keywords | ナノ炭素物質 / 電界効果 / ダイナミクス |
Outline of Final Research Achievements |
In this work, we focued on nano-carbon materials such as graphene and carbon nanotubes, which are candidates for highly efficient field electron emission sources. Theoretical elucidation of the structural dynamics of nanocarbon materials and composite systems composed of nano-carbon materials and other nano-materias was carried out. We found that the armchair edge would give a high current density and that the adsorption of OH and NH would increase the field emission current density of graphene.Additionally, we also investigated carrier accumulation phenomena in bilayer graphene under an external electric field, structure and electronic propeties of novel two-dimensional carbon networks consisting of five- and six-membered rings, dynamics of Ne atoms around the edges of graphene under a positive electric field, and structure and electronic properties of diamond nanowires.
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Free Research Field |
物性理論
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Academic Significance and Societal Importance of the Research Achievements |
本研究の学術的意義は、計算物質科学の手法を用いで、電界下でナノ構造物質並びに、その端近傍における原子ダイナミクスの解明を行った点にある。すなわち、強電場が印加されたグラフェン等のナノ構造物質において、その形状や電場に対する配向がダイナミクスと電子物性決定を決定する極めて重要な要素であることを明らかにした。この結果をもとに、今後の高効率な電界放出デバイスの設計指針の提示を行った点が社会的な意義となる。
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