Effects of Hydrogen Partial Pressure in the Annealing Process on Graphene Growth
- Authors
- Jung, Da Hee; Kang, Cheong; Kim, Minjung; Cheong, Hyeonsik; Lee, Hangil; Lee, Jin Seok
- Issue Date
- Feb-2014
- Publisher
- AMER CHEMICAL SOC
- Citation
- JOURNAL OF PHYSICAL CHEMISTRY C, v.118, no.7, pp 3574 - 3580
- Pages
- 7
- Journal Title
- JOURNAL OF PHYSICAL CHEMISTRY C
- Volume
- 118
- Number
- 7
- Start Page
- 3574
- End Page
- 3580
- URI
- https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/10973
- DOI
- 10.1021/jp410961m
- ISSN
- 1932-7447
1932-7455
- Abstract
- Graphene domains with different sizes and densities were successfully grown on Cu foils with use of a chemical vapor deposition method. We investigated the effects of volume ratios of argon to hydrogen during the annealing process on graphene growth, especially as a function of hydrogen partial pressure. The mean size and density of graphene domains increased with an increase in hydrogen partial pressure during the annealing time. In addition, we found that annealing with use of only hydrogen gas resulted in snowflake-shaped carbon aggregates. Energy-dispersive X-ray spectroscopy (EDX) and high-resolution photoemission spectroscopy (HRPES) revealed that the snowflake-shaped carbon aggregates have stacked sp(2) carbon configuration. With these observations, we demonstrate the key reaction details for each growth process and a proposed growth mechanism as a function of the partial pressure of H-2 during the annealing process.
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