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ZDRAŽIL, L. ZAHRADNÍČEK, R. MOHAN, R. SEDLÁČEK, P. NEJDL, L. SCHMIEDOVÁ, V. POSPÍŠIL, J. HORÁK, M. WEITER, M. ZMEŠKAL, O. HUBÁLEK, J.
Original Title
Preparation of Graphene Quantum Dots through Liquid Phase Exfoliation Method
Type
journal article in Web of Science
Language
English
Original Abstract
Here we report the preparation of low defect blue fluorescent graphene quantum dots (GQDs) through microwave expansion and liquid phase exfoliation (LPE) of graphite flakes with a high preparation yield of 0.63 g of GQDs per 1 g of original graphite substrate. The maximum emission in the prepared GQDs occurs at 467 nm for 370 nm excitation. The photoluminescence quantum yield of the prepared GQDs was measured as 3.4 %. Prepared GQDs are composed of carbon, oxygen and nitrogen elements. They have high percentage (86 %) of C-C/C=C, indicating few structural defects of the graphitic core, due to lesser number of edge- or surface-located oxygenated functional groups. This preparation technique, unlike others, does not require additional chemical components and is energetically undemanding. Furthermore, the reported method is also suitable for scalable preparation of quantum structures from other two-dimensional layered materials.
Keywords
Carbon material; nanoparticles; liquid phase exfoliation; microwave expansion; luminescence
Authors
ZDRAŽIL, L.; ZAHRADNÍČEK, R.; MOHAN, R.; SEDLÁČEK, P.; NEJDL, L.; SCHMIEDOVÁ, V.; POSPÍŠIL, J.; HORÁK, M.; WEITER, M.; ZMEŠKAL, O.; HUBÁLEK, J.
Released
7. 8. 2018
ISBN
1872-7883
Periodical
JOURNAL OF LUMINESCENCE
Year of study
1
Number
State
Kingdom of the Netherlands
Pages from
203
Pages to
208
Pages count
6
URL
https://www.sciencedirect.com/science/article/pii/S0022231318307075
BibTex
@article{BUT149162, author="Lukáš {Zdražil} and Radim {Zahradníček} and Rajneesh {Mohan} and Petr {Sedláček} and Lukáš {Nejdl} and Veronika {Schmiedová} and Jan {Pospíšil} and Michal {Horák} and Martin {Weiter} and Oldřich {Zmeškal} and Jaromír {Hubálek}", title="Preparation of Graphene Quantum Dots through Liquid Phase Exfoliation Method", journal="JOURNAL OF LUMINESCENCE", year="2018", volume="1", number="1", pages="203--208", doi="10.1016/j.jlumin.2018.08.017", issn="1872-7883", url="https://www.sciencedirect.com/science/article/pii/S0022231318307075" }