화학공학소재연구정보센터
Korean Journal of Materials Research, Vol.24, No.12, 694-699, December, 2014
다양한 금속 기판재료에 따른 그래핀의 유도결합 플라즈마 화학기상 성장 특성
Inductively-Coupled Plasma Chemical Vapor Growth Characteristics of Graphene Depending on Various Metal Substrates
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We report the chemical vapor deposition growth characteristics of graphene on various catalytic metal substrates such as Ni, Fe, Ag, Au, and Pt. 50-nm-thick metal films were deposited on SiO2/Si substrates using dc magnetron sputtering. Graphene was synthesized on the metal/SiO2/Si substrates with CH4 gas (1 SCCM) diluted in mixed gases of 10% H2 and 90 % Ar (99 SCCM) using inductively-coupled plasma chemical vapor deposition (ICP-CVD). The highest quality of graphene film was achieved on Ni and Fe substrates at 900 oC and 500 W of ICP power. Ni substrate seemed to be the best catalytic material among the tested materials for graphene growth because it required the lowest growth temperature (600 oC) as well as showing a low ICP power of 200W. Graphene films were successfully grown on Ag, Au, and Pt substrates as well. Graphene was formed on Pt substrate within 2 sec, while graphene film was achieved on Ni substrate over a period of 5 min of growth. These results can be understood as showing the direct CVD growth of graphene with a highly efficient catalytic reaction on the Pt surface.
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