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

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

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,...

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Main Authors: Qian Feng, Wenqing Xiao, Yuan Liu, Yongping Zheng, Yuda Lin, Jiaxin Li, Qingying Ye, Zhigao Huang
Format: Article
Language:English
Published: MDPI AG 2018-01-01
Series:Materials
Subjects:
fluorinated graphene
thermal cutting
graphene quantum dots
photoluminescence
paramagnetism
Online Access:http://www.mdpi.com/1996-1944/11/1/91
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spelling doaj-bad011e329604e50a54b5356a62428a12020-11-24T22:58:55ZengMDPI AGMaterials1996-19442018-01-011119110.3390/ma11010091ma11010091Novel Synthesis of Slightly Fluorinated Graphene Quantum Dots with Luminescent and Paramagnetic Properties through Thermal Cutting of Fluorinated GrapheneQian Feng0Wenqing Xiao1Yuan Liu2Yongping Zheng3Yuda Lin4Jiaxin Li5Qingying Ye6Zhigao Huang7Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials, College of Physics and Energy, Fujian Normal University, Fuzhou 350117, ChinaFujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials, College of Physics and Energy, Fujian Normal University, Fuzhou 350117, ChinaFaculty of Science, Jiangsu University, Zhenjiang 212013, ChinaFujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials, College of Physics and Energy, Fujian Normal University, Fuzhou 350117, ChinaFujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials, College of Physics and Energy, Fujian Normal University, Fuzhou 350117, ChinaFujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials, College of Physics and Energy, Fujian Normal University, Fuzhou 350117, ChinaFujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials, College of Physics and Energy, Fujian Normal University, Fuzhou 350117, ChinaFujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials, College of Physics and Energy, Fujian Normal University, Fuzhou 350117, ChinaA 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.http://www.mdpi.com/1996-1944/11/1/91fluorinated graphenethermal cuttinggraphene quantum dotsphotoluminescenceparamagnetism
collection DOAJ
language English
format Article
sources DOAJ
author Qian Feng
Wenqing Xiao
Yuan Liu
Yongping Zheng
Yuda Lin
Jiaxin Li
Qingying Ye
Zhigao Huang
spellingShingle Qian Feng
Wenqing Xiao
Yuan Liu
Yongping Zheng
Yuda Lin
Jiaxin Li
Qingying Ye
Zhigao Huang
Novel Synthesis of Slightly Fluorinated Graphene Quantum Dots with Luminescent and Paramagnetic Properties through Thermal Cutting of Fluorinated Graphene
Materials
fluorinated graphene
thermal cutting
graphene quantum dots
photoluminescence
paramagnetism
author_facet Qian Feng
Wenqing Xiao
Yuan Liu
Yongping Zheng
Yuda Lin
Jiaxin Li
Qingying Ye
Zhigao Huang
author_sort Qian Feng
title Novel Synthesis of Slightly Fluorinated Graphene Quantum Dots with Luminescent and Paramagnetic Properties through Thermal Cutting of Fluorinated Graphene
title_short Novel Synthesis of Slightly Fluorinated Graphene Quantum Dots with Luminescent and Paramagnetic Properties through Thermal Cutting of Fluorinated Graphene
title_full Novel Synthesis of Slightly Fluorinated Graphene Quantum Dots with Luminescent and Paramagnetic Properties through Thermal Cutting of Fluorinated Graphene
title_fullStr Novel Synthesis of Slightly Fluorinated Graphene Quantum Dots with Luminescent and Paramagnetic Properties through Thermal Cutting of Fluorinated Graphene
title_full_unstemmed Novel Synthesis of Slightly Fluorinated Graphene Quantum Dots with Luminescent and Paramagnetic Properties through Thermal Cutting of Fluorinated Graphene
title_sort novel synthesis of slightly fluorinated graphene quantum dots with luminescent and paramagnetic properties through thermal cutting of fluorinated graphene
publisher MDPI AG
series Materials
issn 1996-1944
publishDate 2018-01-01
description 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.
topic fluorinated graphene
thermal cutting
graphene quantum dots
photoluminescence
paramagnetism
url http://www.mdpi.com/1996-1944/11/1/91
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