Effect of metal ions on the quenching of photoluminescent CdTe QDs and their recovery

Aiwu Wang; Li Fu; Tingke Rao; Wen Cai; Muk Fung Yuen; Jiasong Zhong

doi:10.1016/j.optmat.2015.01.010

Effect of metal ions on the quenching of photoluminescent CdTe QDs and their recovery

Aiwu Wang
, Li Fu
, Tingke Rao
, Wen Cai
, Muk Fung Yuen
, Jiasong Zhong

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

34 Scopus citations

Abstract

Herein, we report a simple, rapid and low-cost method as a probe for ultrasensitive Cu²⁺ detection by using CdTe quantum dots. For the detection of Cu²⁺, we simply synthesized three different sizes of thioglycolic acid (TGA) stabilized CdTe quantum dots (QDs) by tuning the refluxing time. A rapid and reliable detection of Cu²⁺ with a detection limit as low as 0.04 nM (1 × 10^-9 mol/L) is obtained, to our knowledge, which was the lowest concentration for detection of Cu²⁺ by using CdTe QDs. And we also found that copper (II) ions, other than other metal ions, can quench the fluorescent of quantum dots with excellent selectivity in the linear response range of 0.25-617.53 nM. Moreover, the ammonium solution was used to recover the fluorescence quenched by metal ions for the first time. Mechanism for turn-off-on of photoluminescence (PL) in CdTe QDs was also systematically discussed.

Original language	English
Pages (from-to)	548-552
Number of pages	5
Journal	Optical Materials
Volume	42
DOIs	https://doi.org/10.1016/j.optmat.2015.01.010
State	Published - 1 Apr 2015
Externally published	Yes

Keywords

CdTe QDs
Copper ions
Photoluminescence
Recovery

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10.1016/j.optmat.2015.01.010

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@article{aba8c7633bfd474396d4ba0368c59468,

title = "Effect of metal ions on the quenching of photoluminescent CdTe QDs and their recovery",

abstract = "Herein, we report a simple, rapid and low-cost method as a probe for ultrasensitive Cu2+ detection by using CdTe quantum dots. For the detection of Cu2+, we simply synthesized three different sizes of thioglycolic acid (TGA) stabilized CdTe quantum dots (QDs) by tuning the refluxing time. A rapid and reliable detection of Cu2+ with a detection limit as low as 0.04 nM (1 × 10-9 mol/L) is obtained, to our knowledge, which was the lowest concentration for detection of Cu2+ by using CdTe QDs. And we also found that copper (II) ions, other than other metal ions, can quench the fluorescent of quantum dots with excellent selectivity in the linear response range of 0.25-617.53 nM. Moreover, the ammonium solution was used to recover the fluorescence quenched by metal ions for the first time. Mechanism for turn-off-on of photoluminescence (PL) in CdTe QDs was also systematically discussed.",

keywords = "CdTe QDs, Copper ions, Photoluminescence, Recovery",

author = "Aiwu Wang and Li Fu and Tingke Rao and Wen Cai and Yuen, \{Muk Fung\} and Jiasong Zhong",

year = "2015",

month = apr,

day = "1",

doi = "10.1016/j.optmat.2015.01.010",

language = "英语",

volume = "42",

pages = "548--552",

journal = "Optical Materials",

issn = "0925-3467",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Effect of metal ions on the quenching of photoluminescent CdTe QDs and their recovery

AU - Wang, Aiwu

AU - Fu, Li

AU - Rao, Tingke

AU - Cai, Wen

AU - Yuen, Muk Fung

AU - Zhong, Jiasong

PY - 2015/4/1

Y1 - 2015/4/1

N2 - Herein, we report a simple, rapid and low-cost method as a probe for ultrasensitive Cu2+ detection by using CdTe quantum dots. For the detection of Cu2+, we simply synthesized three different sizes of thioglycolic acid (TGA) stabilized CdTe quantum dots (QDs) by tuning the refluxing time. A rapid and reliable detection of Cu2+ with a detection limit as low as 0.04 nM (1 × 10-9 mol/L) is obtained, to our knowledge, which was the lowest concentration for detection of Cu2+ by using CdTe QDs. And we also found that copper (II) ions, other than other metal ions, can quench the fluorescent of quantum dots with excellent selectivity in the linear response range of 0.25-617.53 nM. Moreover, the ammonium solution was used to recover the fluorescence quenched by metal ions for the first time. Mechanism for turn-off-on of photoluminescence (PL) in CdTe QDs was also systematically discussed.

AB - Herein, we report a simple, rapid and low-cost method as a probe for ultrasensitive Cu2+ detection by using CdTe quantum dots. For the detection of Cu2+, we simply synthesized three different sizes of thioglycolic acid (TGA) stabilized CdTe quantum dots (QDs) by tuning the refluxing time. A rapid and reliable detection of Cu2+ with a detection limit as low as 0.04 nM (1 × 10-9 mol/L) is obtained, to our knowledge, which was the lowest concentration for detection of Cu2+ by using CdTe QDs. And we also found that copper (II) ions, other than other metal ions, can quench the fluorescent of quantum dots with excellent selectivity in the linear response range of 0.25-617.53 nM. Moreover, the ammonium solution was used to recover the fluorescence quenched by metal ions for the first time. Mechanism for turn-off-on of photoluminescence (PL) in CdTe QDs was also systematically discussed.

KW - CdTe QDs

KW - Copper ions

KW - Photoluminescence

KW - Recovery

UR - https://www.scopus.com/pages/publications/84924180564

U2 - 10.1016/j.optmat.2015.01.010

DO - 10.1016/j.optmat.2015.01.010

M3 - 文章

AN - SCOPUS:84924180564

SN - 0925-3467

VL - 42

SP - 548

EP - 552

JO - Optical Materials

JF - Optical Materials

ER -

Effect of metal ions on the quenching of photoluminescent CdTe QDs and their recovery

Abstract

Keywords

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