Observing Graphene Grow: Catalyst–Graphene Interactions during Scalable Graphene Growth on Polycrystalline Copper
| Autor: | Carsten Baehtz, Robert S. Weatherup, Raoul Blume, Zhu-Jun Wang, Stephan Hofmann, Piran R. Kidambi, Marc Georg Willinger, Robert Schloegl, Bernhard C. Bayer |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Materials science
Letter Surface Properties Inorganic chemistry environmental scanning electron microscopy chemistry.chemical_element Bioengineering 02 engineering and technology Chemical vapor deposition 010402 general chemistry 7. Clean energy 01 natural sciences law.invention polycrystalline copper (Cu) in situ X-ray diffractometry X-ray photoelectron spectroscopy law intercalation General Materials Science Graphite in situ X-ray photoelectron spectroscopy Graphene oxide paper chemical vapor deposition (CVD) Graphene Mechanical Engineering Photoelectron Spectroscopy General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Carbon 0104 chemical sciences Nanostructures Oxygen Chemical engineering chemistry Crystallite 0210 nano-technology Crystallization Graphene nanoribbons Copper |
| Zdroj: | Nano Letters Nano Letters 13(2013), 4769-4778 |
| ISSN: | 1530-6992 1530-6984 |
| Popis: | Complementary in situ X-ray photoelectron spectroscopy (XPS), X-ray diffractometry, and environmental scanning electron microscopy are used to fingerprint the entire graphene chemical vapor deposition process on technologically important polycrystalline Cu catalysts to address the current lack of understanding of the underlying fundamental growth mechanisms and catalyst interactions. Graphene forms directly on metallic Cu during the high-temperature hydrocarbon exposure, whereby an upshift in the binding energies of the corresponding C1s XPS core level signatures is indicative of coupling between the Cu catalyst and the growing graphene. Minor carbon uptake into Cu can under certain conditions manifest itself as carbon precipitation upon cooling. Postgrowth, ambient air exposure even at room temperature decouples the graphene from Cu by (reversible) oxygen intercalation. The importance of these dynamic interactions is discussed for graphene growth, processing, and device integration. |
| Databáze: | OpenAIRE |
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