| 학회 |
한국재료학회 |
| 학술대회 |
2020년 가을 (11/18 ~ 11/20, 휘닉스 제주 섭지코지) |
| 권호 |
26권 1호 |
| 발표분야 |
G. 나노/박막 재료 분과 |
| 제목 |
Evaluation of gas barrier property of graphene grown by two-step growth process and electro-chemical polishing |
| 초록 |
Graphene with chemical inertness and complete impermeability to any gases can be used as a gas barrier against water and oxygen diffusion and protective layer to prevent the metal electrodes from oxidation, corrosion, and degradation in electrochemical systems.[1] In this study, we use a combined approach of electro-chemical polishing (ECP) and two-step growth methods to improve the gas barrier property of graphene without an increase in the layer numbers or additional fabrication process. Three different graphene layers were prepared as follows: The first graphene was grown on as-received Cu foil without any treatment by one step growth (1step-w/o ECP), the second graphene was grown on electrochemically polished Cu foil by one step growth (1step-ECP) and the third graphene was grown on ECP Cu foil by two step growth (2step-ECP). Figure 1 shows water vapor transmission rate (WVTR) with time for three different samples. The formation of graphene on PET leads to a decrease in WVTR results compared to bare PET. In particular, 2step-ECP graphene on PET exhibits the lowest WVTR value of 0.665±0.046 g/m2-day, which is 57.9% less than 1.58±0.029 g/m2-day of bare PET due to large domains and improved graphene quality with minimized defects. The CVD graphene reported here could open up the possibility for exploring graphene-based gas barrier. |
| 저자 |
Su Jin Kim, Eun Mi Kim, Chil-Hyoung Lee, Jongho Lee, Tae Hoon Seo
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| 소속 |
Korea Institute of Industrial Technology |
| 키워드 |
Graphene; gas barrier; two-step growth; electro-chemical polishing(ECP); water vapor transmission rate (WVTR)
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| E-Mail |
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