Solid-state graphene formation via a nickel carbide intermediate phase [Nickel carbide (Ni<sub>3</sub>C) as an intermediate phase for graphene formation] [electronic resource].
- Washington, D.C. : United States. Dept. of Energy. Office of Science, 2015. and Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
- Physical Description:
- pages 99,037-99,043 : digital, PDF file
- Additional Creators:
- Oak Ridge National Laboratory, United States. Department of Energy. Office of Science, and United States. Department of Energy. Office of Scientific and Technical Information
- Restrictions on Access:
- Free-to-read Unrestricted online access
- Direct formation of graphene with controlled number of graphitic layers on dielectric surfaces is highly desired for practical applications. Despite significant progress achieved in understanding the formation of graphene on metallic surfaces through chemical vapor deposition (CVD) of hydrocarbons, very limited research is available elucidating the graphene formation process via rapid thermal processing (RTP) of solid-state amorphous carbon, through which graphene is formed directly on dielectric surfaces accompanied by autonomous nickel evaporation. It is suggested that a metastable hexagonal nickel carbide (Ni<sub>3</sub>C) intermediate phase plays a critical role in transforming amorphous carbon to 2D crystalline graphene and contributing to the autonomous Ni evaporation. Temperature resolved carbon and nickel evolution in the RTP process is investigated using Auger electron spectroscopic (AES) depth profiling and glancing-angle X-ray diffraction (GAXRD). Formation, migration and decomposition of the hexagonal Ni<sub>3</sub>C are confirmed to be responsible for the formation of graphene and the evaporation of Ni at 1100 °C. The Ni<sub>3</sub>C-assisted graphene formation mechanism expands the understanding of Ni-catalyzed graphene formation, and provides insightful guidance for controlled growth of graphene through the solid-state transformation process.
- Published through SciTech Connect., 11/10/2015., "KC0406010", "ERKCM03", RSC Advances 5 ISSN 2046-2069 AM, and W Xiong; Yunshen Zhou; Wenjia Hou; Thomas Guillemet; Jean-François Silvain; Michel Lahaye; Eric Lebraud; Shen Xu; Xinwei Wang; David A Cullen; Karren Leslie More; Yong Feng Lu.
- Funding Information:
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