In-situ polymerization approach for preparation polyacrylic acid coated ZnS quantum dots

YANG Chunfeng; LI Xie; ZHANG Yingxin; WANG Tingting; WANG Hui

doi:10.13801/j.cnki.fhclxb.20200103.003

Volume 37 Issue 9

Sep. 2020

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YANG Chunfeng, LI Xie, ZHANG Yingxin, et al. In-situ polymerization approach for preparation polyacrylic acid coated ZnS quantum dots[J]. Acta Materiae Compositae Sinica, 2020, 37(9): 2258-2264. doi: 10.13801/j.cnki.fhclxb.20200103.003

Citation:

YANG Chunfeng, LI Xie, ZHANG Yingxin, et al. In-situ polymerization approach for preparation polyacrylic acid coated ZnS quantum dots[J]. Acta Materiae Compositae Sinica, 2020, 37(9): 2258-2264. doi: 10.13801/j.cnki.fhclxb.20200103.003

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In-situ polymerization approach for preparation polyacrylic acid coated ZnS quantum dots

doi: 10.13801/j.cnki.fhclxb.20200103.003

YANG Chunfeng^{1
,
,},
LI Xie^1
,,
ZHANG Yingxin^1
,,
WANG Tingting^1
,,
WANG Hui^2
,

1.
Department of Material and Chemical Engineering, Ningbo University of Technology, Ningbo 315211, China
2.
Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China

Received Date: 2019-10-16
Accepted Date: 2019-11-06

Available Online: 2020-01-03

Publish Date: 2020-09-15

Abstract

Abstract

The surface of ZnS quantum dots was modified with polyacrylic acid(PAA) by situ polymerization. The resulting ZnS@PAA composite nanoparticles were characterized by XRD, TEM, FTIR, TGA and fluorescence test. XRD results indicat that the ZnS@PAA composite nanoparticles exhibite a pure cubic phase. FTIR and TGA results reveal that the ZnS nano particles are coated with PAA. TEM results reveal that PAA coated ZnS quantum dots monodisperse and spherical shape in the water phase, the size of spherical particles is estimated to be 28 nm. The fluorescence tests show that after PAA coated, the fluorescent position and intensity of ZnS@PAA composite nanoparticles do not changed significantly. The test results display that PAA coated ZnS quantum dots have more favorable dispersion stability than that of the uncoated ones in aqueous system. The ZnS@PAA composite nanoparticles with excellen oxidation resistance, fluorescence stability, water-solubility and carboxyl-functionalization could be used for biological detection and bio-imaging.
- ZnS,
- quantum dots,
- polyacrylic acid,
- in-situ polymerization,
- surface modification,
- water-soluble polymer,
- fluorescence properties
Long Abstrsct
Innovation Points

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References(34)

References

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