| 학회 |
한국화학공학회 |
| 학술대회 |
2012년 가을 (10/24 ~ 10/26, 부산 BEXCO) |
| 권호 |
18권 2호, p.2403 |
| 발표분야 |
재료 |
| 제목 |
Synthesis of Graphene Balls by Carbon Segregation from Nickel Nanoparticles |
| 초록 |
We report the fabrication of multilayer graphene balls (GBs) by template-directed carbon segregation using nickel nanoparticles (Ni-NPs) as template materials. To maintain the ball shape of the template Ni-NPs, we used a carburization process using polyol solution as carbon source, and a thermal annealing process to synthesize graphene layers via carbon segregation on the outer surface of the Ni-NPs. The resulting GBs were hollow structures composed of multilayer graphene after the removal of core Ni-NPs, and the thickness of the graphene layers and the size of GBs were tunable by controlling the graphene synthesis conditions. X-ray diffraction (XRD) analysis and in situ transmission electron microscope (TEM) characterization revealed that carbon atoms diffused effectively into the Ni-NPs during the carburization step, and that the diffused carbon atoms in Ni-NPs segregated and successfully formed graphene layer on the surface of the Ni-NPs during thermal annealing. We also performed the further heat treatment at high temperature to improve the quality of graphene layer, resulting high crystalline GBs. |
| 저자 |
최원묵1, 윤선미2, 신현진2, 백현석3, 최재영2
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| 소속 |
1울산대, 2삼성종합기술원, 3한국기초과학지원(연) |
| 키워드 |
graphene; graphene balls; carbon segregation
|
| E-Mail |
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| 원문파일 |
초록 보기 |
