Surface Diffusion Directed Growth of Anisotropic Graphene Domains onDifferent Copper Lattices
| Autor: | Ji Eun Nam, Heekyung Jeong, Cheong Kang, Jin Seok Lee, Dahee Jung |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Surface diffusion
Work (thermodynamics) Multidisciplinary Materials science Atmospheric pressure Graphene chemistry.chemical_element 02 engineering and technology Chemical vapor deposition 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Copper Article 0104 chemical sciences law.invention chemistry law Chemical physics 0210 nano-technology Anisotropy Graphene nanoribbons |
| Zdroj: | SCIENTIFIC REPORTS(6) Scientific Reports |
| Popis: | Anisotropic graphene domains are of significant interest since the electronic properties of pristine graphene strongly depend on its size, shape, and edge structures. In this work, considering that the growth of graphene domains is governable by the dynamics of the graphene-substrate interface during growth, we investigated the shape and defects of graphene domains grown on copper lattices with different indices by chemical vapor deposition of methane at either low pressure or atmospheric pressure. Computational modeling identified that the crystallographic orientation of copper strongly influences the shape of the graphene at low pressure, yet does not play a critical role at atmospheric pressure. Moreover, the defects that have been previously observed in the center of four-lobed graphene domains grown under low pressure conditions were demonstrated for the first time to be caused by a lattice mismatch between graphene and the copper substrate. |
| Databáze: | OpenAIRE |
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