Synthesis of gold nanoclusters-loaded lysozyme nanoparticles for ratiometric fluorescent detection of cyanide in tap water, cyanogenic glycoside-containing plants, and soils

2021 ◽  
pp. 112144
Author(s):  
Wei-Bin Tseng ◽  
Jui-Yeh Rau ◽  
Hung-Chi Chiou ◽  
Wei-Lung Tseng
Keyword(s):  
Tap Water ◽  
Gold Nanoclusters ◽  
Fluorescent Detection ◽  
Cyanogenic Glycoside

o-Phenylenediamine as a reaction-based probe for the fluorescent detection of Ce(IV) ions

2020 ◽  
pp. 174751982092463
Author(s):  
Xiaojing Lai ◽  
Qiuxiang Ye ◽  
Ruixiang Wang ◽  
Peng Wang ◽  
Jin-Biao Liu
Keyword(s):  
River Water ◽  
Fluorescent Probe ◽  
Fluorescence Enhancement ◽  
Tap Water ◽  
Oxidative Cyclization ◽  
Fluorescent Detection ◽  
Oxidative Activity ◽  
Lateritic Soil

o-Phenylenediamine as a new fluorescent probe is designed for detecting Ce(IV) ions. The mechanism of detection relies on the oxidative activity of Ce(IV) ions, which can promote the oxidative cyclization of o-Phenylenediamine leading to the formation of fluorescent 2,3-diaminophenazine and giving a more than 150-fold fluorescence enhancement. Furthermore, the o-Phenylenediamine fluorescent probe was effectively used for the detection of Ce(IV) ions in river water, tap water, rainwater, and lateritic soil from Ganzhou.

Acid-Triggered Self-Assembled Egg White Protein-Coated Gold Nanoclusters for Selective Fluorescent Detection of Fe3+, NO2–, and Cysteine

2020 ◽  
Vol 3 (12) ◽  
pp. 11838-11849
Author(s):  
Wenyan Li ◽  
Xiangping Wen ◽  
Hemiao Zhao ◽  
Wenjun Yan ◽  
John F. Trant ◽  
...  
Keyword(s):  
Gold Nanoclusters ◽  
Egg White ◽  
Fluorescent Detection ◽  
Egg White Protein ◽  
Self Assembled

Scissor-based fluorescent detection of pepsin using lysozyme-stabilized Au nanoclusters

2014 ◽  
Vol 6 (17) ◽  
pp. 6789-6795 ◽  
Author(s):  
Wei Li ◽  
Zhao Gao ◽  
Rongxin Su ◽  
Wei Qi ◽  
Libing Wang ◽  
...  
Keyword(s):  
Gold Nanoclusters ◽  
Sensitive Detection ◽  
Fluorescent Detection ◽  
Au Nanoclusters ◽  
Hydrolysis Of

Highly selective and sensitive detection of pepsin was developed through peptic hydrolysis of lysozyme-stabilized gold nanoclusters at pH 3.

Highly sensitive fluorescent detection of trypsin based on BSA-stabilized gold nanoclusters

2012 ◽  
Vol 32 (1) ◽  
pp. 297-299 ◽  
Author(s):  
Lianzhe Hu ◽  
Shuang Han ◽  
Saima Parveen ◽  
Yali Yuan ◽  
Ling Zhang ◽  
...  
Keyword(s):  
Gold Nanoclusters ◽  
Fluorescent Detection ◽  
Highly Sensitive

scholarly journals A Fluorescent Detection for Paraquat Based on β-CDs-Enhanced Fluorescent Gold Nanoclusters

Foods ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 1178
Author(s):  
Hong-Xin Ren ◽  
Min-Xin Mao ◽  
Min Li ◽  
Cun-Zheng Zhang ◽  
Chi-Fang Peng ◽  
...  
Keyword(s):  
Fluorescence Intensity ◽  
Linear Response ◽  
High Selectivity ◽  
Gold Nanoclusters ◽  
Fluorescent Sensors ◽  
Fluorescent Detection ◽  
Tetraacetic Acid ◽  
Host Molecule ◽  
Fluorescent Sensing ◽  
Fluorescent Method

In this report, a fluorescent sensing method for paraquat based on gold nanoclusters (AuNCs) is proposed. It was found that paraquat could quench both glutathione-capped AuNCs (GSH-AuNCs) and β-cyclodextrin-modified GSH-AuNCs (GSH/β-CDs-AuNCs). The modification of β-CDs on the surface of GSH-AuNCs obviously enhanced the fluorescence intensity of GSH-AuNCs and improved the sensitivity of paraquat sensing more than 4-fold. This sensibilization was ascribed to the obvious fluorescence intensity enhancement of GSH-AuNCs by β-CDs and the “host–guest” interaction between paraquat and β-CDs. The fluorescence quenching was mainly due to the photoinduced energy transfer (PET) between GSH/β-CDs-AuNCs and paraquat. With the optimized β-CDs modification of the GSH-AuNC surfaces and under buffer conditions, the fluorescent detection for paraquat demonstrated a linear response in the range of 5.0–350 ng/mL with a detection limit of 1.2 ng/mL. The fluorescent method also showed high selectivity toward common pesticides. The interference from metal ions could be easily masked by ethylene diamine tetraacetic acid (EDTA). This method was applied to the measurement of paraquat-spiked water samples and good recoveries (93.6–103.8%) were obtained. The above results indicate that host molecule modification of fluorescent metal NC surfaces has high potential in the development of robust fluorescent sensors.

Label-free turn-on fluorescent detection of melamine based on the anti-quenching ability of Hg2+ to gold nanoclusters

2014 ◽  
Vol 53 ◽  
pp. 76-81 ◽  
Author(s):  
Haichao Dai ◽  
Yan Shi ◽  
Yilin Wang ◽  
Yujing Sun ◽  
Jingting Hu ◽  
...  
Keyword(s):  
Gold Nanoclusters ◽  
Fluorescent Detection ◽  
Label Free ◽  
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