Journal of Materials Chemistry A, volume 17, issue 25, pages 2661
Photo-assisted synthesis of highly fluorescent ZnSe(S) quantum dots in aqueous solution
Publication type: Journal Article
Publication date: 2007-04-23
Journal:
Journal of Materials Chemistry A
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor: 11.9
ISSN: 20507488, 20507496, 09599428, 13645501
DOI:
10.1039/b702469j
Materials Chemistry
General Chemistry
Abstract
This paper describes the synthesis of highly water-soluble and fluorescent ZnSe(S)-alloyed quantum dots (QDs). We used zinc perchlorate hexahydrate, sodium hydrogen selenide as precursors and mercaptopropionic acid as stabilizer to synthesize ZnSe QDs in aqueous solution at 160 °C for 9 h. The as-prepared ZnSe QDs possess a quantum yield (QY) of 8.1% and high trapped emission. After UV irradiation using a 100 W Hg–Xe lamp for 0.5 h, ZnSe(S) QDs having a QY of 19.0% are formed from ZnSe QDs. However, aggregation of ZnSe(S) QDs under longer UV irradiation (> 0.5 h) takes place, leading to instability and irreproducibility. To overcome this, additional thiol compounds (mercaptopropionic acid, mercaptosuccinic acid, 11-mercaptoundecanoic acid, and thioglycolic acid) were separately added to ZnSe QD solutions during UV irradiation. UV irradiation and oxygen accelerate the release of S2− from the thiol compounds, leading to the formation of ZnSe(S) QDs. Among the thiol compounds, mercaptosuccinic acid is the most suitable in terms of stability and photoluminescence intensity. We suggest that the size and functional group of the thiol compounds play an important role in determining the optical properties and stability of ZnSe(S) QDs. The as-prepared ZnSe(S) QDs fluoresce strongly (QY up to 44.0%) at 407 nm with a narrow bandwidth (W1/2 < 25 nm) when excited at 325 nm.
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Citations by publishers
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5
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Elsevier
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2 publications, 2.04%
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1 publication, 1.02%
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1 publication, 1.02%
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1 publication, 1.02%
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Scientific Publishers
1 publication, 1.02%
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Hindawi Limited
1 publication, 1.02%
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Trans Tech Publications
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1 publication, 1.02%
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1 publication, 1.02%
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- We do not take into account publications without a DOI.
- Statistics recalculated only for publications connected to researchers, organizations and labs registered on the platform.
- Statistics recalculated weekly.
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Lan G. Yu. et al. Photo-assisted synthesis of highly fluorescent ZnSe(S) quantum dots in aqueous solution // Journal of Materials Chemistry A. 2007. Vol. 17. No. 25. p. 2661.
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Lan G. Yu., Lan G., Lin Y., Huang Y., Chang H. Photo-assisted synthesis of highly fluorescent ZnSe(S) quantum dots in aqueous solution // Journal of Materials Chemistry A. 2007. Vol. 17. No. 25. p. 2661.
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TY - JOUR
DO - 10.1039/b702469j
UR - https://doi.org/10.1039/b702469j
TI - Photo-assisted synthesis of highly fluorescent ZnSe(S) quantum dots in aqueous solution
T2 - Journal of Materials Chemistry A
AU - Lan, Guo Yu
AU - Lin, Yang
AU - Huang, Yu-Fen
AU - Chang, Huan
AU - Lan, Guo-Yu
PY - 2007
DA - 2007/04/23 00:00:00
PB - Royal Society of Chemistry (RSC)
SP - 2661
IS - 25
VL - 17
SN - 2050-7488
SN - 2050-7496
SN - 0959-9428
SN - 1364-5501
ER -
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@article{2007_Lan,
author = {Guo Yu Lan and Yang Lin and Yu-Fen Huang and Huan Chang and Guo-Yu Lan},
title = {Photo-assisted synthesis of highly fluorescent ZnSe(S) quantum dots in aqueous solution},
journal = {Journal of Materials Chemistry A},
year = {2007},
volume = {17},
publisher = {Royal Society of Chemistry (RSC)},
month = {apr},
url = {https://doi.org/10.1039/b702469j},
number = {25},
pages = {2661},
doi = {10.1039/b702469j}
}
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Lan, Guo Yu., et al. “Photo-assisted synthesis of highly fluorescent ZnSe(S) quantum dots in aqueous solution.” Journal of Materials Chemistry A, vol. 17, no. 25, Apr. 2007, p. 2661. https://doi.org/10.1039/b702469j.