Visual detection of glyphosate in environmental water samples using cysteamine-stabilized gold nanoparticles as colorimetric probe

Zheng, Jiajia; Zhang, Haijuan; Qu, Ji-chun; Zhu, Qian; Chen, Xingguo

doi:10.1039/c2ay26391b

Cited by 83 publications

(35 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[12][13][14][15][16] Several literatures had been reported on pesticides residues sensing based on the aggregation of AuNPs accompanied with color change. 14,17,18 For instance, Liu et al 19 have developed colorimetric sensor based on bare AuNPs for cartap analysis e®ectively with a detection limit of 0.04 mg/kg. However, bare AuNPs would act not only with amino (-NH 2 Þ but also with other functional groups such as cyanogroup (-CN) and imino or nitrilo group in other pesticides, 16,18 which may lead to some false color signal in cartap analysis.…”

Section: Introductionmentioning

confidence: 99%

Development of Simple and Effective Dual-Readout Sensor Based on Gold Nanoparticles and Cadmium Telluride Quantum Dots for Cartap Analysis

Hou

et al. 2016

NANO

View full text Add to dashboard Cite

Cartap is among the most popular pesticides that are widely used to boost food production, however, its residues pose a great threat to human health and the environment. We presented simple and e®ective colorimetric sensor based on aggregation of gold nanoparticles (AuNPs) with appropriate diameter and°uorescent sensor via inner¯lter e®ect (IFE) of AuNPs on cadmium telluride quantum dots (CdTe QDs), respectively. Firstly, e®ect of diameter of AuNPs was investigated and the results indicated that AuNPs with diameter of 13 nm (AuNPs 13nm Þ showed better sensitivity toward cartap. Thus, AuNPs 13nm was chosen for colorimetric and°uorescent cartap assay. On one hand, mercaptoacetic acid (MA) was functionalized on AuNPs 13nm for the improvement of anti-disturbance ability for discrimination study. A decent linear relationship for cartap was obtained in the range from 1 M to 50 M with detection limit of 1.32 M for colorimetric readout; on the other hand,°uorescent sensor based on AuNPs 13nm displayed excellent linear relationship with cartap concentration varying from 20 nM to 100 nM with low detection limit of 4.02 nM. And the above-mentioned sensor showed acceptable anti-disturbance ability for cartap discrimination. These results demonstrated that the sensor as-developed would be a great potential candidate for cartap detection in real application.

show abstract

Section: Introductionmentioning

confidence: 99%

Development of Simple and Effective Dual-Readout Sensor Based on Gold Nanoparticles and Cadmium Telluride Quantum Dots for Cartap Analysis

Hou

et al. 2016

NANO

View full text Add to dashboard Cite

show abstract

“…While the simplicity of preparation and generality of cysAuNPs are comparable to that of citAuNPs, the former is relatively stable due to the stronger Au-S bonds as previously described. 10,11 Given their interesting properties, cysAuNPs have been incorporated into various assays for different sensing purposes, including colorimetric 8,12-20 and electrochemical. 21,22 In the context of cysAuNPs-derived aptasensors, they are mainly based on the following general principles: (i) In the absence of targets, electrostatic interaction between oppositely charged DNA aptamers and cysAuNPs leads to close proximity of the particles and aggregate them;…”

Section: Introductionmentioning

confidence: 99%

Cysteamine-coated gold nanoparticles for bimodal colorimetric detection with inverse sensitivity: a proof-of-concept with lysozyme

Wai

New

2020

RSC Adv.

View full text Add to dashboard Cite

show abstract

“…Recent years, the combination of QDs and AuNPs in one micro matrix is expected to result in ideal sensors. AuNPs have been successfully applied for detecting a large variety of targets owing to their excellent photoelectrical properties (Xiao and Yu 2010;Ma et al 2011) and the accompanying color change of solution (Li and Rothberg 2004;Zhu et al 2012;Kanagaraj et al 2012;Sun et al 2011;Zheng et al 2013;Imene et al 2014;Tan et al 2014;Li et al 2014;Zhang et al 2014). Hence, colorimetric sensor for pesticide and herbicide by controlling the surface condition of AuNPs is a hotspot in trace sensing.…”

Section: Introductionmentioning

confidence: 99%

Highly sensitive colorimetric and fluorescent sensor for cyanazine based on the inner filter effect of gold nanoparticles

et al. 2016

View full text Add to dashboard Cite

Cyanazine residue poses a great threat to human health and its derivatives would remain in soils, natural waters, and other environmental domains for a long time. Herein, a simple, rapid, and ultrasensitive analytical method for the determination of cyanazine (CZ) based on inner filter effect (IFE) of Au nanoparticles (AuNPs) on the fluorescence of CdTe quantum dots (QDs) is first described in this study.With the presence of citrate-stabilized AuNPs, the fluorescence of GSH-capped CdTe QDs was remarkably quenched by AuNPs via IFE. The fluorescence of the AuNP-CdTe QD system was recovered upon addition of CZ. CZ can adsorb on to the surface of AuNPs due to its cyano group that has good affinity with gold, which could induce the aggregation of AuNPs accompanying color change from red to blue. Thus, the IFE of AuNPs on CdTe QDs was weakened, and the fluorescence intensity of CdTe QDs was recovered accordingly. A good linear correlation for detection of CZ was exhibited from 0.05 to 9 lM, and the detection limit reached 0.1568 lM, which was much lower than the safety limit required by the USA, the UK, and China. In order to probe into the selectivity of AuNPs towards CZ over other pesticides, various frequently used pesticides were mixed with AuNPs. AuNP composite solution shows good selectivity towards CZ among other pesticides. This method was successfully carried out for the assessment of CZ in real samples with satisfactory results, Electronic supplementary material The online version of this article (

show abstract

Visual detection of glyphosate in environmental water samples using cysteamine-stabilized gold nanoparticles as colorimetric probe

Cited by 83 publications

References 47 publications

Development of Simple and Effective Dual-Readout Sensor Based on Gold Nanoparticles and Cadmium Telluride Quantum Dots for Cartap Analysis

Development of Simple and Effective Dual-Readout Sensor Based on Gold Nanoparticles and Cadmium Telluride Quantum Dots for Cartap Analysis

Cysteamine-coated gold nanoparticles for bimodal colorimetric detection with inverse sensitivity: a proof-of-concept with lysozyme

Highly sensitive colorimetric and fluorescent sensor for cyanazine based on the inner filter effect of gold nanoparticles

Contact Info

Product

Resources

About