2023 Fiscal Year Final Research Report
Synthesis of novel nanocarbon materials by reducing interlayer coupling in 3D-stacked graphene
| Project/Area Number |
21H01763
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Review Section |
Basic Section 28030:Nanomaterials-related
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| Research Institution | Osaka University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
仁科 勇太 岡山大学, 異分野融合先端研究コア, 教授 (50585940)
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | グラフェン / 酸化グラフェン / 化学気相成長法 / ナノ炭素材料 / 結晶成長 / ランダム積層 / 層間相互作用 / 超高温プロセス |
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| Outline of Final Research Achievements |
We have developed a method to form nanocarbon structures with excellent two-dimensional physical properties comparable to those of single-layer graphene by suppressing the interactions between the layers of multilayer graphene, and verified the physical advantages of this method. In order to suppress the interlayer interaction, we approached from two aspects: (1) the use of random stacking structure, which we have been investigating recently, and (2) the insertion of hetero-materials (spacers) between the graphene layers. We have achieved the large-area growth required for device application by growing randomly stacked graphene by the chemical vapor deposition with sequential process under extremely clean conditions. The spacer insertion by the alternating-drop method and the transfer method increased the layer spacing compared to random stacking, resulting in significantly improved two-dimensionality, such as uniform optical absorption over wide wavelength from UV-Vis to IR.
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| Free Research Field |
ナノ材料工学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究で得られたナノ炭素構造体である層間相互作用を抑制した3次元積層グラフェン薄膜は、多層でありながら単層と同様の電子構造を持ち、単層グラフェンの優れた特性が維持される。本技術はグラフェンを実用材料として応用する場合の障害のひとつである多層化による電子物性の劣化という課題を解決するための基盤となる。今後、欠陥密度低減やドメインサイズ拡大、さらには３次元集積化を進めることにより、大面積フレキシブルエレクトロニクス材料や電極・放熱シート等の複合体材料など、多層グラフェンの大きな容量を活かした応用展開が期待される。
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