| 학회 |
한국고분자학회 |
| 학술대회 |
2014년 가을 (10/06 ~ 10/08, 제주 ICC) |
| 권호 |
39권 2호 |
| 발표분야 |
분자전자 부문위원회 |
| 제목 |
Novel Synthesis of Graphene under Knudsen Flow on Confined Nickel Surfaces |
| 초록 |
We suggest a simple, efficient method that uses confined catalytic geometry to maximize the synthesis area and the throughput of graphene synthesis by CVD. We also systematically controlled the gas flow and the dimension of confinement of what for graphene growth. The confined stacked system follows non-continuum fluid dynamics as the interfacial gap decreases; these dynamics strongly affect the dissolution step of graphene growth. The criterion for graphene growth under this geometry was quantified by the Knudsen number, which is the ratio of mean-free-path of the gas molecules to the size of the gap. Graphene grown using this confined system showed reproducible, uniform properties at low hydrocarbon concentration, ensuring highly efficient CVD production of large-area graphene. Also, the evolution of the catalytic Ni surface under the stacked system results in larger grains with increased (111) planes than the non-stacked system, in high-quality multi-layer graphene. |
| 저자 |
봉효진, 조새벽, 강보석, 이성규, 김현호, 조길원
|
| 소속 |
POSTECH |
| 키워드 |
Graphene; Graphene growth; Confined growth; Knudsen molecular flow; Metal coil
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| E-Mail |
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