A novel fluorescent sensor for mercury (<scp>ii</scp>) ion using self-assembly of poly(diallyl dimethyl ammonium)chloride functionalized CdTe quantum dots

Yang, Ran; Ding, Xiaojie; Zhou, Yuchen; Li, Jianjun; Qu, Lingbo; Zhang, Kangyi

doi:10.1039/c4ay01710b

Cited by 9 publications

(1 citation statement)

References 39 publications

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“…20 It contains many positively charged quaternary ammonium ions, which enables it to easily assemble with electronegative probes through electrostatic self-assembly. 21 In this study, we studied the response of GQDs to the different concentrations of PDDA. As shown in Fig.…”

Section: Characterization Of Gqdsmentioning

confidence: 99%

Sensitive detection of acid phosphatase based on graphene quantum dots nanoassembly

2016

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In this study, we report a convenient label-free fluorescence biosensor for the detection of acid phosphatase based on the aggregation-caused quenching of graphene quantum dots (GQDs). The fluorescence of GQDs could be quenched by poly-(dimethyl diallyl ammonium chloride) (PDDA); the high efficiency of the quenching was caused by the non-covalent binding of positively charged PDDA to negatively charged GQDs through electrostatic interactions, aggregating to form a GQDs-PDDA complex. Addition of sodium hexametaphosphate (NaPO3)6 could effectively turn on the quenched fluorescence due to the stronger electrostatic interactions between positively charged PDDA and negatively charged (NaPO3)6. The introduction of acid phosphatase (ACP) would lead to the breakdown of (NaPO3)6 into small fragments and disassemble the complex of PDDA-(NaPO3)6. As a result, the recovered fluorescence could be quenched again by the addition of ACP. Quantitative evaluation of ACP activity in a broad range from 30 nU mL(-1) to 420 nU mL(-1) with a detection limit of 12 nU mL(-1) can be achieved in this way, endowing the assay with sufficiently high sensitivity for practical detection of ACP in human serum.

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Section: Characterization Of Gqdsmentioning

confidence: 99%

Sensitive detection of acid phosphatase based on graphene quantum dots nanoassembly

2016

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A Fe3O4@SiO2@graphene quantum dot core-shell structured nanomaterial as a fluorescent probe and for magnetic removal of mercury(II) ion

Alvand

Shemirani

2017

Microchim Acta

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A simple fluorescent probe for detecting mercury(II) ion in aqueous solution and on agar gels

Duan

Zhou

et al. 2017

J IRAN CHEM SOC

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A novel fluorescent sensor for mercury (ii) ion using self-assembly of poly(diallyl dimethyl ammonium)chloride functionalized CdTe quantum dots

Abstract: A novel fluorescent sensor was constructed for selective quantitative analysis of mercury(ii) ion based on poly(diallyl dimethyl ammonium)chloride (PDDA) functionalized CdTe quantum dots.

Cited by 9 publications

References 39 publications

Sensitive detection of acid phosphatase based on graphene quantum dots nanoassembly

Sensitive detection of acid phosphatase based on graphene quantum dots nanoassembly

A Fe3O4@SiO2@graphene quantum dot core-shell structured nanomaterial as a fluorescent probe and for magnetic removal of mercury(II) ion

A simple fluorescent probe for detecting mercury(II) ion in aqueous solution and on agar gels

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