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Materials 2018, 11(1), 91; https://doi.org/10.3390/ma11010091

Novel Synthesis of Slightly Fluorinated Graphene Quantum Dots with Luminescent and Paramagnetic Properties through Thermal Cutting of Fluorinated Graphene

1
Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials, College of Physics and Energy, Fujian Normal University, Fuzhou 350117, China
2
Fujian Provincial Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Xiamen 361005, China
3
Faculty of Science, Jiangsu University, Zhenjiang 212013, China
*
Authors to whom correspondence should be addressed.
Received: 19 December 2017 / Revised: 3 January 2018 / Accepted: 5 January 2018 / Published: 8 January 2018
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Abstract

A novel approach has been developed to synthesize slightly fluorinated graphene quantum dots (GQDs-F) through thermal cutting of highly fluorinated graphene. The fluorinated graphene with substantial structure defects is fragile and is readily attacked. The direct evaporation of abundant CFn (n = 2, 3) groups near structure defects lead to the loss of adjacent skelton C atoms, and the fluorinated graphene can be thermally cut into GQDs-F with a relatively uniform nanosize in pyrolysis at 810 K. The GQDs-F with a low F/C atomic ratio of ca. 0.03 exhibit excitation wavelength-dependent properties with multicolor photoluminescence (PL) from blue to green. At the same time, F adatoms that are most likely located at the edges of GQDs-F have a high efficiency of introducing paramagnetic centres, and GQDs-F show a strong paramagnetism because of sp3-type defects and magnetic zigzag edges. The graphene quantum dots with such multimodal capabilities should have great applied value in material science. View Full-Text
Keywords: fluorinated graphene; thermal cutting; graphene quantum dots; photoluminescence; paramagnetism fluorinated graphene; thermal cutting; graphene quantum dots; photoluminescence; paramagnetism
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Feng, Q.; Xiao, W.; Liu, Y.; Zheng, Y.; Lin, Y.; Li, J.; Ye, Q.; Huang, Z. Novel Synthesis of Slightly Fluorinated Graphene Quantum Dots with Luminescent and Paramagnetic Properties through Thermal Cutting of Fluorinated Graphene. Materials 2018, 11, 91.

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