journal article·2014-11-26

Effect of Cooling Condition on Chemical Vapor Deposition Synthesis of Graphene on Copper Catalyst

Dong Soo Choi, Keun Soo Kim, Hyeongkeun Kim, Yena Kim, TaeYoung Kim, Se-hyun Rhy, Cheol-Min Yang, Dae Ho Yoon, Woo Seok Yang

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Abstract

Here, we show that chemical vapor deposition growth of graphene on copper foil is strongly affected by the cooling conditions. Variation of cooling conditions such as cooling rate and hydrocarbon concentration in the cooling step has yielded graphene islands with different sizes, density of nuclei, and growth rates. The nucleation site density on Cu substrate is greatly reduced when the fast cooling condition was applied, while continuing methane flow during the cooling step also influences the nucleation and growth rate. Raman spectra indicate that the graphene synthesized under fast cooling condition and methane flow on cool-down exhibit superior quality of graphene. Further studies suggest that careful control of the cooling rate and CH4 gas flow on the cooling step yield a high quality of graphene.
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Research context

OpenAlex topics: Business, Innovation, and Economy · Organizational Management and Innovation · Diverse Applied Research Studies

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Affiliations

School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 440-746, Republic of Korea

Electronic Materials and Device Research Center, Korea Electronics Technology Institute, Seongnam 463-816, Republic of Korea

Department of Physics and Graphene Research Institute, Sejong University, Seoul 143-747, Republic of Korea

Department of Bionanotechnology, Gachon University, Seongnam 461-701, Republic of Korea

Intelligent Mechatronics Research Center, Korea Electronics Technology Institute, Puchon 420-140, Republic of Korea

Institute of Advanced Composite Materials, Korea Institute of Science and Technology (KIST), Wanju-gun, Jeollabuk-do 565-905, Republic of Korea

SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon 440-746, Republic of Korea

Funding

Ministry of Knowledge Economy · Ministry of Trade, Industry and Energy · National Research Foundation of Korea

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