An approach to controlling the fluorescence of graphene quantum dots: From surface oxidation to fluorescent mechanism

Yin Hu; Da Wei He; Yong Sheng Wang; Jia Hua Duan; Su Feng Wang; Ming Fu; Wen Shuo Wang

doi:10.1088/1674-1056/23/12/128103

An approach to controlling the fluorescence of graphene quantum dots: From surface oxidation to fluorescent mechanism

Yin Hu, Da Wei He^*, Yong Sheng Wang, Jia Hua Duan, Su Feng Wang, Ming Fu, Wen Shuo Wang

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

Abstract

We report a facile method of synthesizing graphene quantum dots (GQDs) with tunable emission. The as-prepared GQDs each with a uniform lateral dimension of ca. 6 nm have fine solubility and high stability. The photoluminescence mechanism is further investigated based on the surfacestructure and the photoluminescence behaviors. Based on our discussion, the green fluorescence emission can be attributed to the oxygen functional groups, which could possess broad emission bands within the π-π∗ gap. This work is helpful to explain the vague fluorescent mechanism of GQDs, and the reported synthetic method is useful to prepare GQDs with controllable fluorescent colors.

Original language	English
Article number	128103
Journal	Chinese Physics B
Volume	23
Issue number	12
DOIs	https://doi.org/10.1088/1674-1056/23/12/128103
Publication status	Published - 1 Dec 2014
Externally published	Yes

Keywords

Graphene quantum dots
Tunable luminescence

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10.1088/1674-1056/23/12/128103

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abstract = "We report a facile method of synthesizing graphene quantum dots (GQDs) with tunable emission. The as-prepared GQDs each with a uniform lateral dimension of ca. 6 nm have fine solubility and high stability. The photoluminescence mechanism is further investigated based on the surfacestructure and the photoluminescence behaviors. Based on our discussion, the green fluorescence emission can be attributed to the oxygen functional groups, which could possess broad emission bands within the π-π∗ gap. This work is helpful to explain the vague fluorescent mechanism of GQDs, and the reported synthetic method is useful to prepare GQDs with controllable fluorescent colors.",

keywords = "Graphene quantum dots, Tunable luminescence",

author = "Yin Hu and He, {Da Wei} and Wang, {Yong Sheng} and Duan, {Jia Hua} and Wang, {Su Feng} and Ming Fu and Wang, {Wen Shuo}",

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T1 - An approach to controlling the fluorescence of graphene quantum dots

T2 - From surface oxidation to fluorescent mechanism

AU - Hu, Yin

AU - He, Da Wei

AU - Wang, Yong Sheng

AU - Duan, Jia Hua

AU - Wang, Su Feng

AU - Fu, Ming

AU - Wang, Wen Shuo

PY - 2014/12/1

Y1 - 2014/12/1

N2 - We report a facile method of synthesizing graphene quantum dots (GQDs) with tunable emission. The as-prepared GQDs each with a uniform lateral dimension of ca. 6 nm have fine solubility and high stability. The photoluminescence mechanism is further investigated based on the surfacestructure and the photoluminescence behaviors. Based on our discussion, the green fluorescence emission can be attributed to the oxygen functional groups, which could possess broad emission bands within the π-π∗ gap. This work is helpful to explain the vague fluorescent mechanism of GQDs, and the reported synthetic method is useful to prepare GQDs with controllable fluorescent colors.

AB - We report a facile method of synthesizing graphene quantum dots (GQDs) with tunable emission. The as-prepared GQDs each with a uniform lateral dimension of ca. 6 nm have fine solubility and high stability. The photoluminescence mechanism is further investigated based on the surfacestructure and the photoluminescence behaviors. Based on our discussion, the green fluorescence emission can be attributed to the oxygen functional groups, which could possess broad emission bands within the π-π∗ gap. This work is helpful to explain the vague fluorescent mechanism of GQDs, and the reported synthetic method is useful to prepare GQDs with controllable fluorescent colors.

KW - Graphene quantum dots

KW - Tunable luminescence

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DO - 10.1088/1674-1056/23/12/128103

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VL - 23

JO - Chinese Physics B

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ER -

An approach to controlling the fluorescence of graphene quantum dots: From surface oxidation to fluorescent mechanism

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Keywords

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