Fluorescence enhancement of CdTe quantum dots by HBcAb-HRP for sensitive detection of H 2 O 2  in human serum

Gong, Tingting; Liu, Junfeng; Wu, Yiwei; Xiao, Yao; Wang, Xuehan; Yuan, S.L.

doi:10.1016/j.bios.2017.01.048

Cited by 50 publications

(10 citation statements)

References 36 publications

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“…QDs have been used for the determination of various target analytes at trace levels typical analytes include salicylic acid [12], glucose [13], H2O2 [14], 6-mercaptopurine [15], ochratoxin A [16], kaempferol [17] and copper (II) ion [18]. In addition, QDs have many unique optical properties such as tunable size-dependent photoluminescence, good photostability and narrow symmetric emissions [19,20].…”

Section: Introductionmentioning

confidence: 99%

A nanocomposite optosensor containing carboxylic functionalized multiwall carbon nanotubes and quantum dots incorporated into a molecularly imprinted polymer for highly selective and sensitive detection of ciprofloxacin

Yuphintharakun

Nurerk

Chullasat

et al. 2018

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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A nanocomposite optosensor consisting of carboxylic acid functionalized multiwall carbon nanotubes and CdTe quantum dots embedded inside a molecularly imprinted polymer (COOH@MWCNT-MIP-QDs) was developed for trace ciprofloxacin detection. The COOH@MWCNT-MIP-QDs were synthesized through a facile sol-gel process using ciprofloxacin as a template molecule, 3-aminopropylethoxysilane as a functional monomer and tetraethoxysilane as a cross-linker at a molar ratio of 1:8:20. The synthesized nanocomposite optosensor had high sensitivity, excellent specificity and high binding affinity to ciprofloxacin. Under optimal conditions, the fluorescence intensity of the optosensor decreased in a linear fashion with the concentration of ciprofloxacin and two linear dynamic ranges were obtained, 0.10-1.0 μg L and 1.0-100.0 μg L with a very low limit of detection of 0.066 μg L. The imprinting factors of the two linear range were 17.67 and 4.28, respectively. The developed nanocomposite fluorescence probe was applied towards the determination of ciprofloxacin levels in chicken muscle and milk samples with satisfactory recoveries being obtained in the range of 82.6 to 98.4%. The results were also in good agreement with a HPLC method which indicates that the optosensor can be used as a sensitive, selective and rapid method to detect ciprofloxacin in chicken and milk samples.

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Section: Introductionmentioning

confidence: 99%

A nanocomposite optosensor containing carboxylic functionalized multiwall carbon nanotubes and quantum dots incorporated into a molecularly imprinted polymer for highly selective and sensitive detection of ciprofloxacin

Yuphintharakun

Nurerk

Chullasat

et al. 2018

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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“…These factors limit their widespread use. Developing a detection method for Hg 2+ , which involves relatively low-cost and simple instruments, is a major research focus. − …”

Section: Introductionmentioning

confidence: 99%

Detection of Hg²⁺ by a Dual-Fluorescence Ratio Probe Constructed with Rare-Earth-Element-Doped Cadmium Telluride Quantum Dots and Fluorescent Carbon Dots

et al. 2021

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Quantum dots (QDs) and carbon quantum dots (CDs) are classes of zero-dimensional materials whose sizes can be ≤10 nm. They exhibit excellent optical properties and are widely used to prepare fluorescent probes for qualitative and quantitative detection of test objects. In this article, we used cerium chloride as the cerium source and used the in situ doped cerium (rare-earth element) to develop cadmium telluride (CdTe) quantum dots following the aqueous phase method. CdTe: Ce quantum dots were successfully synthesized. The solution of CdTe:Ce QDs was mixed with the CD solution prepared following the green microwave method to form a ratio fluorescence sensor that can be potentially used for the selective detection of mercury ions (Hg 2+ ). We used transmission electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction, and other microscopy and spectral characterization techniques to validate that Ce had been successfully doped. The test results on the fluorescence performance revealed that Ce doping enhances the predoped fluorescence performance of the CdTe QDs. We have quantitatively detected Hg 2+ using a ratiometric fluorescence sensor to show that in the range of 10–60 nM, the fluorescence quenching efficiency increases linearly with the increase in Hg 2+ concentration. The linear correlation coefficient R 2 = 0.9978, and its detection limit was found to be 2.63 nM L –1 . It was observed that other interfering ions do not significantly affect the fluorescence intensity of the probe. According to the results of the blank addition experiment, the developed proportional fluorescence probe can be used for the detection of Hg 2+ in actual samples.

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“…In nowadays, the traditional analytical methods for detection of triazophos include gas chromatography (GC) (Andrade et al, 2015;Matyus et al, 2012) and liquid or gas chromatography coupled with mass spectrometry (MS), and the methods have good stability and high sensitivity. However, the detection takes a long time, requires professional operation and complicated sample pre-treatment, it is not suitable for real-time detection and on-side field detection, and more importantly, the reagents required during sample processing will be polluted environment again (Du et al, 2015;Gong et al, 2017). In a large number of instances, immunoassays have been identified as a special tool for pesticide detection due to its simple, inexpensive, and rapid characteristics.…”

Section: Introductionmentioning

confidence: 99%

Simple and sensitive detection of triazophos pesticide by using quantum dots nanobeads based on immunoassay

Liao

Cui

Chen

et al. 2019

Food and Agricultural Immunology

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A rapid, ultra-sensitive and simple fluorescence immunoassay (FLISA) on CdSe/ZnS Quantum dots (QDs) for recognition pesticide triazophos have been established. In this assay, the immunoassay uses (CdSe/ZnS) Quantum dots (QDs) as a probe that carries monoclonal antibody (mAb). The free triazophos and OVA-haptens were competed for binding the mAb on the surface of the QDs. Therefore, the concentration of TRIAZ can get by calculation of the detection of fluorescence value. The assay has a linear response in the 10 ng L −1-25 μg L −1 TRIAZ concentration range, and limit of detection (IC 10) was 0.508 ng L −1. The recovery rate in the case of spiked samples ranges from 82.6% to 96.6%, and the RSD is <20%. FLISA can accurately and sensitively screen out triazophos in representative actual samples that contain trace levels of pesticides, it can play a prominent part in agricultural product and environmental detection.

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Fluorescence enhancement of CdTe quantum dots by HBcAb-HRP for sensitive detection of H 2 O 2 in human serum

Cited by 50 publications

References 36 publications

A nanocomposite optosensor containing carboxylic functionalized multiwall carbon nanotubes and quantum dots incorporated into a molecularly imprinted polymer for highly selective and sensitive detection of ciprofloxacin

A nanocomposite optosensor containing carboxylic functionalized multiwall carbon nanotubes and quantum dots incorporated into a molecularly imprinted polymer for highly selective and sensitive detection of ciprofloxacin

Detection of Hg²⁺ by a Dual-Fluorescence Ratio Probe Constructed with Rare-Earth-Element-Doped Cadmium Telluride Quantum Dots and Fluorescent Carbon Dots

Simple and sensitive detection of triazophos pesticide by using quantum dots nanobeads based on immunoassay

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Fluorescence enhancement of CdTe quantum dots by HBcAb-HRP for sensitive detection of H 2 O 2 in human serum

Cited by 50 publications

References 36 publications

A nanocomposite optosensor containing carboxylic functionalized multiwall carbon nanotubes and quantum dots incorporated into a molecularly imprinted polymer for highly selective and sensitive detection of ciprofloxacin

A nanocomposite optosensor containing carboxylic functionalized multiwall carbon nanotubes and quantum dots incorporated into a molecularly imprinted polymer for highly selective and sensitive detection of ciprofloxacin

Detection of Hg2+ by a Dual-Fluorescence Ratio Probe Constructed with Rare-Earth-Element-Doped Cadmium Telluride Quantum Dots and Fluorescent Carbon Dots

Simple and sensitive detection of triazophos pesticide by using quantum dots nanobeads based on immunoassay

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Detection of Hg²⁺ by a Dual-Fluorescence Ratio Probe Constructed with Rare-Earth-Element-Doped Cadmium Telluride Quantum Dots and Fluorescent Carbon Dots