2014
DOI: 10.1038/srep05624
|View full text |Cite
|
Sign up to set email alerts
|

Ultrasensitive Quantum Dot Fluorescence quenching Assay for Selective Detection of Mercury Ions in Drinking Water

Abstract: Mercury is one of the most acutely toxic substances at trace level to human health and living thing. Developing a rapid, cheap and water soluble metal sensor for detecting mercury ions at ppb level remains a challenge. Herein, a metal sensor consisting of MPA coated Mn doped ZnSe/ZnS colloidal nanoparticles was utilized to ultrasensitively and selectively detect Hg2+ ions with a low detection limit (0.1 nM) over a dynamic range from 0 to 20 nM. According to strong interaction between thiol(s) and mercury ions,… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
1
1
1

Citation Types

2
50
0
1

Year Published

2014
2014
2019
2019

Publication Types

Select...
10

Relationship

1
9

Authors

Journals

citations
Cited by 95 publications
(53 citation statements)
references
References 47 publications
2
50
0
1
Order By: Relevance
“…The energy transformation from the band gap (~3.97 eV) of the ZnS QDs to the 4 T 1 state of the Mn(II) ions results in emission at 580 nm based on the Mn(II)-Td transition between 4 T 1 and 6 A 1 . 143 Following a nonlinear optical process, UV-light-induced PL of semiconductor nanocrystals accompanied by blue-green autofluorescence can be prevented. Consequently, in vivo optical imaging obtains a higher spatial resolution and tissue depth.…”
Section: Quantum Dotsmentioning
confidence: 99%
“…The energy transformation from the band gap (~3.97 eV) of the ZnS QDs to the 4 T 1 state of the Mn(II) ions results in emission at 580 nm based on the Mn(II)-Td transition between 4 T 1 and 6 A 1 . 143 Following a nonlinear optical process, UV-light-induced PL of semiconductor nanocrystals accompanied by blue-green autofluorescence can be prevented. Consequently, in vivo optical imaging obtains a higher spatial resolution and tissue depth.…”
Section: Quantum Dotsmentioning
confidence: 99%
“…Furthermore, FTIR spectra of the obtained composite samples are displayed in Figure 5, where the surface organic groups of TiO2 NBs, MoS2, and MoS2/TiO2 samples have been investigated. The obvious peaks centered at 2920 and 2856 cm −1 , and 1502 cm −1 are attributed to stretching vibration of C-H and N-H bands from CH3-and NH2-because of usage of octylamine as a solvent [37,38]. The characteristic peak at 920 cm −1 is assigned to vibration of Mo-S band, which was not found in the pristine TiO2 NBs sample [39].…”
Section: Synthesis and Characterizations Of Mos 2 /Tio 2 Nbs Heterojumentioning
confidence: 94%
“…However, the quantum dots used for fluorescence detection often face the problem of coexisting matter interference [4] , especially for the structure and performance similar to the same material detection [5] , the selectivity is not obvious, so the quantum dot fluorescence detection of specific selectivity to be further improved [6] , more for the firm and highly selective construction methods need to be developed [7] . QDs, dissimilar usual organic fluorophores, are composed of inorganic semiconducting materials, such as CdSe, CdS, or ZnS.…”
Section: Preparation Of Quantum Dots and Fluorescent Molecularly Imprmentioning
confidence: 99%