Chemical Vapor Deposition of Graphene on Cu-Ni Alloys: The Impact of Carbon Solubility
| Autor: | Samir H. Al-Hilfi, Brian Derby, Ian A. Kinloch |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
copper-nickel alloys
Materials science Diffusion chemistry.chemical_element 02 engineering and technology Substrate (electronics) Chemical vapor deposition carbon solubility 010402 general chemistry 01 natural sciences law.invention law Materials Chemistry Solubility Graphene Slow cooling graphene Surfaces and Interfaces Engineering (General). Civil engineering (General) 021001 nanoscience & nanotechnology 0104 chemical sciences Surfaces Coatings and Films chemistry Chemical engineering chemical vapour deposition TA1-2040 0210 nano-technology Bilayer graphene Carbon |
| Zdroj: | Coatings, Vol 11, Iss 892, p 892 (2021) Coatings Volume 11 Issue 8 |
| ISSN: | 2079-6412 |
| DOI: | 10.3390/coatings11080892 |
| Popis: | Chemical vapour deposition (CVD) is the most promising graphene synthesis route for film and electronic applications but the growth mechanism is still not fully understood. Herein, we investigate the role of the solubility of carbon in the underlying growth substrate on the CVD growth of graphene. A range of Cu-Ni alloys compositions that cover the carbon (C) solubility range between low C solubility (pure Cu) and high C solubility (pure Ni) were used as the catalytic growth substrates. The CVD of graphene on Cu-Ni alloys showed a transition from bilayer graphene (BLG) to few-layer graphene (FLG) at a substrate Ni concentration of 45 wt.%, which was attributed to an increase in the bulk diffusion of C. The Cu-rich alloys had a high graphene coverage (BLG) at a fast-cooling rate (367 °C/min), while the Ni-rich alloys had a low coverage (FLG) under the same cooling condition. In contrast, at slow cooling rates (27 °C/min), the Cu-rich alloys had a low coverage of graphene (BLG) and the Ni-rich alloys had a high coverage of graphene (FLG). Glow discharge optical emission spectroscopy (GDOES) was used to profile the subsurface composition, particularly the C concentration, as a function of depth. |
| Databáze: | OpenAIRE |
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