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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2016.1
- 수록면
- 79 - 88 (10page)
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초록· 키워드
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The unique properties of graphene quantum dots (GQDs) make them interesting candidate materials for innovative applications. Herein, we report a facile method to synthesize aminofunctionalized graphene quantum dots (AF-GQDs) by a hydrothermal reaction. Graphene oxide (GO) was synthesized by Hummer's method where ultra-small GO sheets were obtained by a prolonged oxidation process followed by sonication using an ultrasonic probe. Subsequently, graphene hydrogel (GH) was also obtained by a hydrothermal synthesis method. Proper care was taken during synthesis to avoid contamination from water soluble impurities, which are present in the precursor, GO solution. Following the treatment of GH in ammonia, ultra-small aminofunctionalized graphene fragments (AF-GQDs) were formed, which detached from the GH to eventually disperse evenly in the water without agglomerating. This modified synthesis process enables the formation of high-purity AF-GQDs (99.14%) while avoiding time-consuming synthesis procedures. Our finding shows that AF-GQDs with sizes less than 5 nm were well dispersed. A strong photoluminescence (PL) emission at ~410 nm with 10% PL quantum yield was also observed. These AF-GQDs can be used in many bio applications in view of their low cytotoxicity and strong fluorescence that can be applied to cell imaging.
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참고문헌 (41)
참고문헌 신청
A. K. Geim / 2007 / Nat. Mater 6:183
G. Ning / 2011 / Chem. Commun 47:5976
R. R. Nair / 2008 / Science 320:1308
S. Kamal Jalali / 2015 / Graphene-Based Resonant Sensors for Detection of Ultra-Fine Nanoparticles: Molecular Dynamics and Nonlocal Elasticity Investigations / NANO 10(2):64~81
Hongyi Qin / 2016 / A Conductive Copolymer Based on Graphene Oxide and Poly (amidoxime-pyrrole) for Adsorption of Uranium (VI) / NANO 11(4):82~89
G. Ning / 2011 / Chem. Commun 47:5976
R. R. Nair / 2008 / Science 320:1308
S. Kamal Jalali / 2015 / Graphene-Based Resonant Sensors for Detection of Ultra-Fine Nanoparticles: Molecular Dynamics and Nonlocal Elasticity Investigations / NANO 10(2):64~81
Hongyi Qin / 2016 / A Conductive Copolymer Based on Graphene Oxide and Poly (amidoxime-pyrrole) for Adsorption of Uranium (VI) / NANO 11(4):82~89
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