A photoluminescence “switch-on” nanosensor composed of nitrogen and sulphur co-doped carbon dots and gold nanoparticles for discriminative detection of glutathione

The Analyst ◽  
2018 ◽  
Vol 143 (9) ◽  
pp. 2083-2089 ◽  
Author(s):  
Jizhou Li ◽  
Xinyue Rao ◽  
Feng Xiang ◽  
Jianjia Wei ◽  
Mengke Yuan ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Carbon Dots ◽  
Doped Carbon Dots ◽  
Co Doped ◽  
Signal Readout

A nanosensor was established to discriminate glutathione (GSH) from other competitive biothiols based on a photoluminescence (PL) “switch-on” signal readout.

Nitrogen and Sulfur Co-doped Fluorescent Carbon Dots for the Detection of Morin and Cell Imaging

2018 ◽  
Vol 15 (1) ◽  
pp. 47-55
Author(s):  
Xuebing Li ◽  
Haifen Yang ◽  
Ning Wang ◽  
Tijian Sun ◽  
Wei Bian ◽  
...  
Keyword(s):  
Microwave Heating ◽  
Fluorescent Probe ◽  
Fluorescence Intensity ◽  
Carbon Dots ◽  
Cell Imaging ◽  
Water Soluble ◽  
Heating Process ◽  
X Ray ◽  
Doped Carbon Dots ◽  
Co Doped

Background: Morin has many pharmacological functions including antioxidant, anticancer, anti-inflammatory, and antibacterial effects. It is commonly used in the treatment of antiviral infection, gastropathy, coronary heart disease and hepatitis B in clinic. However, researches have shown that morin is likely to show prooxidative effects on the cells when the amount of treatment is at high dose, leading to the decrease of intracellular ATP levels and the increase of necrosis process. Therefore, it is necessary to determine the concentration of morin in biologic samples. Method: Novel water-soluble and green nitrogen and sulfur co-doped carbon dots (NSCDs) were prepared by a microwave heating process with citric acid and L-cysteine. The fluorescence spectra were collected at an excitation wavelength of 350 nm when solutions of NSCDs were mixed with various concentrations of morin. Results: The as-prepared NSCDs were characterized by transmission electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy. The fluorescence intensity of NSCDs decreased significantly with the increase of morin concentration. The fluorescence intensity of NSCDs displayed a linear response to morin in the concentration 0.10-30 μM with a low detection limit of 56 nM. The proposed fluorescent probe was applied to analysis of morin in human body fluids with recoveries of 98.0-102%. Conclusion: NSCDs were prepared by a microwave heating process. The present analytical method is sensitive to morin. The quenching process between NSCDs and morin is attributed to the static quenching. In addition, the cellular toxicity on HeLa cells indicated that the as-prepared NSCDs fluorescent probe does not show obvious cytotoxicity in cell imaging. Our proposed method possibly opens up a rapid and nontoxic way for preparing heteroatom doped carbon dots with a broad application prospect.

Multifunctional N,S co-doped carbon dots for sensitive probing of temperature, ferric ion, and methotrexate

2019 ◽  
Vol 411 (8) ◽  
pp. 1647-1657 ◽  
Author(s):  
Pengli Zuo ◽  
Jianhua Liu ◽  
Hongna Guo ◽  
Chenghong Wang ◽  
Hongqian Liu ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Ferric Ion ◽  
Doped Carbon Dots ◽  
Co Doped

Excitation-dependent multiple luminescence emission of nitrogen and sulfur co-doped carbon dots for cysteine sensing, bioimaging, and photoluminescent ink applications

2021 ◽  
pp. 106280
Author(s):  
Sonaimuthu Mohandoss ◽  
Subramanian Palanisamy ◽  
Veeraraghavan Vishnu Priya ◽  
Surapaneni Krishna Mohan ◽  
Jae-Jin Shim ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Luminescence Emission ◽  
Doped Carbon Dots ◽  
Co Doped

Magnesium-nitrogen co-doped carbon dots enhance plant growth through multifunctional regulation in photosynthesis

2021 ◽  
Vol 422 ◽  
pp. 130114
Author(s):  
Yadong Li ◽  
Xiaokai Xu ◽  
Bingfu Lei ◽  
Jianle Zhuang ◽  
Xuejie Zhang ◽  
...  
Keyword(s):  
Plant Growth ◽  
Carbon Dots ◽  
Doped Carbon Dots ◽  
Co Doped

Nitrogen and Sulfur Co-doped Carbon Dots Enhance Drought Resistance in Tomato and Mung Beans

2021 ◽  
Author(s):  
Erfeng Kou ◽  
Wei Li ◽  
Haoran Zhang ◽  
Xian Yang ◽  
Yunyan Kang ◽  
...  
Keyword(s):  
Drought Resistance ◽  
Carbon Dots ◽  
Doped Carbon Dots ◽  
Co Doped
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