ISSN 1000-6818CN 11-1892/O6CODEN WHXUEU
Acta Phys Chim Sin >> 2016,Vol.32>> Issue(5)>> 1267-1272     doi: 10.3866/PKU.WHXB201603014         中文摘要
Effect of Preparation Conditions on the Optical Properties of PEI-Functionalized Graphene Quantum Dots
WANG Han, WANG Xiao-Min
College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, P. R. China
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Because of their low toxicity and excellent water-solubility, graphene quantum dots have been highly anticipated for use in cellular imaging. However, their limited optical properties are hampering this use. To address this issue, graphene quantum dots surface passivated by branched polyethylenimine (GQDs-BPEI) were proposed in this paper. We discussed optical properties when prepared under different conditions including reaction time, temperature, and pH value. The results indicate that GQDs-BPEI prepared at pH 12, at a temperature of 200 ℃, and with a 20 h reaction in an autoclave can achieve a higher UV absorbency and better PL properties with a high quantum yield.

Keywords: Graphene quantum dot   Polyethylenimine   Preparation condition   Optical property   Quantum yield  
Received: 2015-12-07 Accepted: 2016-02-29 Publication Date (Web): 2016-03-01
Corresponding Authors: WANG Xiao-Min Email:

Fund: The project was supported by the National Natural Science Foundation of China (51372160, 51572184).

Cite this article: WANG Han, WANG Xiao-Min. Effect of Preparation Conditions on the Optical Properties of PEI-Functionalized Graphene Quantum Dots[J]. Acta Phys. -Chim. Sin., 2016,32 (5): 1267-1272.    doi: 10.3866/PKU.WHXB201603014

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