| 학회 |
한국고분자학회 |
| 학술대회 |
2019년 가을 (10/09 ~ 10/11, 제주컨벤션센터) |
| 권호 |
44권 2호 |
| 발표분야 |
기능성 고분자 |
| 제목 |
Size-dependent Fractionation of Graphene Quantum Dots using Cross-flow Filtration |
| 초록 |
Graphene quantum dots (GQDs) have received a great attention for biological, opto-electronics, and energy applications due to its low toxicity, stable photoluminescence (PL), and high chemical resistance. Especially, unique PL features of GQDs depending on its size and shape make it possible. Although many synthetic routes have been proposed to produce a GQD, the broad size distribution of GQDs limits its use as efficient optical agents. Here, we present a method for size fractionation of GQDs (diameter: 5-25 nm) using a cross-flow filtration and a track-etched membrane with cylindrical nanopores. After filtration, we observed a clear blue fluorescence in the permeate side attributed by selective permeation of relatively small GQD molecules and it was estimated that the selectivity in terms of separation factor between green and blue fluorescent GQD was 0.74. Our results demonstrate a feasible method facilitating size fractionation of 2D nanostructures using a cross-flow filtration. |
| 저자 |
임상구1, 강예은1, 문병기2, 정은상1, 양승윤1
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| 소속 |
1부산대, 2부경대 |
| 키워드 |
graphene quantum dots; membrane filtration; tangential flow filtration; 2D nanomaterials
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| E-Mail |
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