Highly fluorescent N,S-co-doped carbon dots: synthesis and multiple applications

2017 ◽  
Vol 41 (19) ◽  
pp. 11125-11137 ◽  
Author(s):  
Jie Shen ◽  
Ting Zhang ◽  
Yan Cai ◽  
Xiuying Chen ◽  
Shaoming Shang ◽  
...  
Keyword(s):  
Human Serum ◽  
Lake Water ◽  
Carbon Dots ◽  
Cell Imaging ◽  
Living Cells ◽  
Doped Carbon Dots ◽  
Co Doped

N and S co-doped carbon dots (N,S-CDs) synthesized from biomass can be used as multicolor probes for cell imaging. The N,S-CDs can selectively and sensitively detect Cr(vi) in real lake water, human serum and living cells.

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.

Green and Simple Synthesis of Photoluminescence-Tunable Carbon Dots for Sensing and Cell Imaging Applications

2021 ◽  
Vol 21 (12) ◽  
pp. 6101-6110
Author(s):  
Dong Sun ◽  
Shu-Jun Li ◽  
Chun-Feng Wang ◽  
Tian-Tian Liu ◽  
Guang-Yue Bai ◽  
...  
Keyword(s):  
Boric Acid ◽  
Carbon Dots ◽  
Luminescence Property ◽  
Cell Imaging ◽  
Fluorescence Emission ◽  
Fluorescent Imaging ◽  
Simple Synthesis ◽  
Low Toxicity ◽  
Doped Carbon Dots ◽  
Co Doped

Innovative nitrogen and boron co-doped carbon dots are hydrothermally produced using fructose, urea, and boric acid as precursors. The synthesized carbon dots possess a uniform morphology, and exhibit excellent fluorescence stability, tunable luminescence property, strong resistance to photobleaching, low-toxicity, and excellent biocompatibility. It is also found more dopant urea is conducive to the formation of the carbon dots with more B–N bonds, and shorter wavelength of fluorescence emission. Meanwhile, the synthesized carbon dots are well utilized as a photoluminescent probe for facile Hg2+ determination and fluorescent imaging reagent in cells.

Nitrogen and phosphorus co-doped carbon dots derived from lily bulbs for copper ion sensing and cell imaging

2018 ◽  
Vol 83 ◽  
pp. 272-278 ◽  
Author(s):  
Dan Gu ◽  
Pingbo Zhang ◽  
Lei Zhang ◽  
Hao Liu ◽  
Zhanbin Pu ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Cell Imaging ◽  
Copper Ion ◽  
Nitrogen And Phosphorus ◽  
Ion Sensing ◽  
Doped Carbon Dots ◽  
Co Doped

Nitrogen and phosphorus co-doped carbon dots as a “turn-off-on” fluorescence probe for the detection of Hg2+ and GSH and cell imaging

2019 ◽  
Vol 11 (45) ◽  
pp. 5803-5809 ◽  
Author(s):  
Xuefang Yang ◽  
Mengting Zhang ◽  
Yulu Zhang ◽  
Ning Wang ◽  
Wei Bian ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Cell Imaging ◽  
Fluorescence Probe ◽  
Raw Materials ◽  
Citric Acid Monohydrate ◽  
Hydrogen Phosphate ◽  
Nitrogen And Phosphorus ◽  
Doped Carbon Dots ◽  
Diammonium Hydrogen ◽  
Co Doped

Nitrogen and phosphorus co-doped carbon dots (NPCDs) were synthesized by a microwave method, using citric acid monohydrate and diammonium hydrogen phosphate as raw materials.

An “on–off–on” selective fluorescent probe based on nitrogen and sulfur co-doped carbon dots for detecting Cu2+ and GSH in living cells

2020 ◽  
Vol 12 (42) ◽  
pp. 5110-5119
Author(s):  
Shanshan Wei ◽  
Tinghua Li ◽  
Xinyu Zhang ◽  
Hongyuan Zhang ◽  
Chunzhu Jiang ◽  
...  
Keyword(s):  
Fluorescent Probe ◽  
Carbon Dots ◽  
Living Cells ◽  
Doped Carbon Dots ◽  
Co Doped

Nitrogen and sulfur co-doped carbon dots (N,S-CDs) as a simple “on–off–on” fluorescent probe were applied for quickly detecting Cu2+ ions and GSH in living cells.

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