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説明:

The integration of graphene with diamond holds great promise for all-carbon materials, yet the precise mechanism governing graphene formation on diamond has remained unclear due to the lack of direct experimental evidence. Conventional preparation methods often rely on empirical annealing parameters. In this study, the catalytic transformation from diamond into graphene or graphite (nickel (Ni) as a catalyst) is investigated through in-situ heating transmission electron microscopy (TEM). We demonstrate that the transition proceeds via a metal-induced solid-state mechanism that is driven by Ni catalysis and reaction-diffusion between Ni and carbon (C) atoms at elevated temperatures. Key processes include Ni grain migration and C–Ni interdiffusion. The annealing duration significantly influences the location and number of graphene layers. Notably, prolonged annealing causes the development of graphene on the Ni surface, whereas rapid, short-term annealing results in the formation of graphene at the diamond/Ni interface. Extended high-temperature exposure increases the number of graphene layers, potentially facilitating graphite formation. Ab initio simulations reveal the polymerization pathway of carbon within the Ni(C) solid solution during graphene nucleation. These insights provide valuable guidance for designing application-specific graphene-on-diamond (GOD) structures, promoting the development of advanced carbon-based technologies.

権利情報:

• In Copyright
  

キーワード: diamond

刊行年月日: 2025-12-27

出版者: Elsevier BV

掲載誌:

• Progress in Solid State Chemistry (ISSN: 00796786) vol. 82 100562

研究助成金:

• HORIZON EUROPE Framework Programme 101027489
• HORIZON EUROPE Framework Programme 101131231
• Horizon 2020 Framework Programme
• Beijing University of Technology
• National Key Research and Development Program of China Stem Cell and Translational Research 2016YFE0133200
• HORIZON EUROPE Framework Programme 734578
• National Key Research and Development Program of China

原稿種別: 査読前原稿 (Author's original)

MDR DOI: https://doi.org/10.48505/nims.6407

公開URL: https://doi.org/10.1016/j.progsolidstchem.2025.100562

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更新時刻: 2026-07-14 11:04:26 +0900

MDRでの公開時刻: 2026-07-14 12:30:09 +0900