Carbon dots based dual-emission silica nanoparticles as ratiometric fluorescent probe for nitrite determination in food samples

2018 ◽  
Vol 260 ◽  
pp. 13-18 ◽  
Author(s):  
Guoqiang Xiang ◽  
Yule Wang ◽  
Heng Zhang ◽  
Huanhuan Fan ◽  
Lu Fan ◽  
...  
Keyword(s):  
Silica Nanoparticles ◽  
Fluorescent Probe ◽  
Carbon Dots ◽  
Food Samples ◽  
Dual Emission ◽  
Nitrite Determination ◽  
Ratiometric Fluorescent Probe

Carbon dots based dual-emission silica nanoparticles as ratiometric fluorescent probe for chromium speciation analysis in water samples

2018 ◽  
Vol 96 (1) ◽  
pp. 72-77 ◽  
Author(s):  
Guoqiang Xiang ◽  
Yue Ren ◽  
Heng Zhang ◽  
Huanhuan Fan ◽  
Xiuming Jiang ◽  
...  
Keyword(s):  
Silica Nanoparticles ◽  
Water Samples ◽  
Carbon Dots ◽  
Speciation Analysis ◽  
Chromium Speciation ◽  
Ratiometric Fluorescence ◽  
Dual Emission ◽  
Acid Type ◽  
Optimized Conditions ◽  
Ratiometric Fluorescent Probe

A simple and effective strategy for designing a ratiometric fluorescent nanosensor was described. A carbon dots (CDs) based dual-emission nanosensor for chromium speciation analysis was developed by coating CDs on the surface of dye-doped silica nanoparticles. The fluorescence of the resulting dual-emission silica nanoparticles was quenched in acetic acid through potassium bromate (KBrO3) oxidation. Cr(VI) was able to catalyze KBrO3 oxidation, resulting in ratiometric fluorescence accelerated quenching response of the dual-emission silica nanoparticles. Several important parameters affecting the nanosensor performance, including acid type, concentrations of KBrO3, and reaction temperature and time were examined. Under the optimized conditions, the detection limit of the nanosensor towards Cr(VI) reached 1.3 ng mL−1, and pretty good linearity was obtained between 20 to 500 ng mL−1. More importantly, the sensor was found suitable for speciation analysis of both Cr(III) and Cr(VI) in different water samples with satisfactory results.

Synthesis of bifunctional fluorescent nanohybrids of carbon dots–copper nanoclusters via a facile method for Fe3+ and Tb3+ ratiometric detection

2021 ◽  
Author(s):  
Shumin Lin ◽  
Jiangxue Dong ◽  
Bangwen Zhang ◽  
Zeming Yuan ◽  
Chunxiao Lu ◽  
...  
Keyword(s):  
Fluorescent Probe ◽  
Carbon Dots ◽  
Mechanical Mixing ◽  
Copper Nanoclusters ◽  
Dual Emission ◽  
Ratiometric Detection ◽  
Ratiometric Fluorescent Probe

In this work, a dual–emission ratiometric fluorescent probe of carbon dots–copper nanoclusters (CDs–Cu NCs) nanohybrids with bifunctional feature was successfully assembled through mechanical mixing. In which CDs were synthesized using...

An efficient ratiometric fluorescent probe based on dual-emission fluorescent silica nanoparticles for visual determination of Hg2+

2015 ◽  
Vol 7 (6) ◽  
pp. 2295-2299 ◽  
Author(s):  
Jing Wang ◽  
Meng Ma ◽  
Rongbin Huang ◽  
Ligeng Wang ◽  
Aimin Chen ◽  
...  
Keyword(s):  
Silica Nanoparticles ◽  
Fluorescent Probe ◽  
Visual Detection ◽  
Fluorescein Isothiocyanate ◽  
Dual Emission ◽  
Fluorescent Silica Nanoparticles ◽  
Ratiometric Fluorescent Probe

CdTe/CdS QD-tagged fluorescein isothiocyanate-doped silica nanoparticles were designed as a ratiometric fluorescent probe for visual detection of Hg2+.

Facile preparation of amino-carbon dots/gold nanoclusters FRET ratiometric fluorescent probe for sensing of Pb2+/Cu2+

2019 ◽  
Vol 282 ◽  
pp. 78-84 ◽  
Author(s):  
Li Wang ◽  
Hai-Xia Cao ◽  
Yu-Sheng He ◽  
Chang-Gang Pan ◽  
Ting-Kai Sun ◽  
...  
Keyword(s):  
Fluorescent Probe ◽  
Carbon Dots ◽  
Gold Nanoclusters ◽  
Facile Preparation ◽  
Ratiometric Fluorescent Probe
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