scholarly journals An Improved Synthesis of Water-Soluble Dual Fluorescence Emission Carbon Dots from Holly Leaves for Accurate Detection of Mercury Ions in Living Cells

2021 ◽  
Vol Volume 16 ◽  
pp. 2045-2058
Author(s):  
Pengchong Wang ◽  
Yan Yan ◽  
Ying Zhang ◽  
Tingting Gao ◽  
Hongrui Ji ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Fluorescence Emission ◽  
Living Cells ◽  
Water Soluble ◽  
Dual Fluorescence ◽  
Mercury Ions ◽  
Accurate Detection

One pot selective synthesis of water and organic soluble carbon dots with green fluorescence emission

RSC Advances ◽  
2015 ◽  
Vol 5 (15) ◽  
pp. 11667-11675 ◽  
Author(s):  
Baozhan Zheng ◽  
Tao Liu ◽  
Man Chin Paau ◽  
Meina Wang ◽  
Yang Liu ◽  
...  
Keyword(s):  
Energy Saving ◽  
Carbon Dots ◽  
Room Temperature ◽  
Fluorescence Emission ◽  
Water Soluble ◽  
Selective Synthesis ◽  
Green Fluorescence ◽  
One Pot ◽  
Soluble Carbon

This work reports a simple and energy-saving strategy for selective synthesis of water-soluble and organic-soluble carbon dots at room temperature.

scholarly journals Preparation of water-soluble asphalt carbon dots and hyperchromic effect to Cr (VI)

2018 ◽  
Vol 238 ◽  
pp. 02007
Author(s):  
Lijuan Gao ◽  
Jia Sui ◽  
Xiaoqin Qiao ◽  
Chaoshuai Hu ◽  
Xuefei Zhao
Keyword(s):  
Carbon Dots ◽  
Water Solubility ◽  
Fluorescence Emission ◽  
Acid Precipitation ◽  
Water Soluble ◽  
Raw Material ◽  
Precipitation Method ◽  
Acid Oxidation ◽  
Excitation Wavelength ◽  
Uv Spectrum

Water-soluble asphalt carbon dots (W-CDs) was prepared from medium - temperature coal tar pitch as raw material, via mixed acid oxidation, alkali solubilization and acid precipitation method. It was observed that as-prepared W-CDs were irregular particles with good water dispersibility and the particle size was controlled by the pH of the acid precipitation solution by a polarizing microscope. Infrared spectroscopy confirmed that the surface of the W-CDs was functionalized by hydrophilic and color-promoting functional groups, which had good water solubility; the thermal weight loss proved to be good thermal stability below 200°C; the fluorescence spectrum proved that the fluorescence emission peak position of the carbon dots appears red shift with increase of excitation wavelength, with fluorescence conversion property, and its emission light intensity decreases, belonging to non-resonant fluorescence type of direct jump fluorescence; UV spectrum proves that the addition of W-CDs can be chromium (VI) CrO42- content The detection limit was increased from milligram to microgram; the molar absorptivity of CrO42- was increased by 4 times. The experimentally optimized W-CDs-ultraviolet-viscometry method for measuring CrO42- conditions: W-CDs to chromium ratio of 8:2, pH of 8, hexamethylenetetramine as a surfactant, and the solution was allowed to stand at room temperature for 45 min.

Self-formed C-dot-based 2D polysiloxane with high photoluminescence quantum yield and stability

Nanoscale ◽  
2020 ◽  
Vol 12 (19) ◽  
pp. 10771-10780
Author(s):  
Guangqi Hu ◽  
Xiaokai Xu ◽  
Bingfu Lei ◽  
Jianle Zhuang ◽  
Xuejie Zhang ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Carbon Dots ◽  
Fluorescence Emission ◽  
Quantum Yields ◽  
Dual Fluorescence ◽  
Photoluminescence Quantum Yield ◽  
Si Doped ◽  
Doped Carbon Dots

A novel 2D polysiloxane embedded with Si-doped-carbon-dots was synthesized, which shows dual-fluorescence emission, and high photoluminescence quantum yields and stability.

Nitrogen-doped carbon dots for the detection of mercury ions in living cells and visualization of latent fingerprints

2018 ◽  
Vol 42 (9) ◽  
pp. 6824-6830 ◽  
Author(s):  
Guojuan Ren ◽  
Yuxi Meng ◽  
Qi Zhang ◽  
Mingyu Tang ◽  
Baoya Zhu ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Solvothermal Method ◽  
Living Cells ◽  
Mercury Ions ◽  
Latent Fingerprints ◽  
Nitrogen Doped ◽  
Doped Carbon Dots ◽  
Nitrogen Doped Carbon

Nitrogen-doped carbon dots (NCDs) were synthesised using a simple and straightforward solvothermal method.

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.

Nitrogen-doped carbon dots from Hutai-8 grape skin and their application in Hg2+ detection

2020 ◽  
Vol 16 ◽  
Author(s):  
Pan Zhang ◽  
Shun-Sheng Zhao ◽  
JiaJia Wang ◽  
Xiang Rong Liu
Keyword(s):  
Heavy Metal ◽  
Carbon Source ◽  
Fluorescence Quenching ◽  
Hydrothermal Method ◽  
Water Samples ◽  
Carbon Dots ◽  
Mercury Ions ◽  
Grape Skin ◽  
Fluorescent Carbon Dots ◽  
Fluorescent Carbon

Background: In recent years, environmental pollution and heavy metal pollution caused by rapid urbanization and industrialization have become increasingly serious. Among them, mercury (II) ion (Hg2+) is one of the highly toxic heavy metal ions, and its pollution comes from various natural resources and human activities. Therefore, people attach great importance to the development of analytical methods for effective analysis and sensitive detection of Hg2+ . Objective: Using grape skin as a green and environmental friendly carbon source, to synthesize fluorescent carbon dots, and try to apply them to the detect the concentration of Hg2+ in water. Method: Using "Hutai No. 8" grape skin as carbon source, fluorescent carbon dots were synthesized by one-step hydrothermal method. Structure and fluorescent properties of the carbon dots were tested using TEM, XPS, XRD and other characterization instruments, and their utilization on detection of mercury ions in the actual water samples was explored. Results: The CDs had a particle size of about 4.8 nm and a spherical shape. There are N-H, C-N, C=O and other functional groups on the surface. It was found that Hg2+ has obvious fluorescence quenching effect on CDs, and thus CDs fluorescence quenching method to detect the concentration Hg2+ was established, and the detection limit is 3.7 μM, which could be applied to test the concentration of Hg2+ in water samples. Conclusion: Using grape skin as carbon source, fluorescent carbon dots were successfully synthesized by hydrothermal method. Carbon dots were used to detect mercury ions in water, and a method for detecting mercury ions in actual water samples was established.

Carbon dots derived from Fusobacterium nucleatum for intracellular determination of Fe3+ and bioimaging both in vitro and in vivo

2021 ◽  
Author(s):  
Lijuan Liu ◽  
Shengting Zhang ◽  
Xiaodan Zheng ◽  
Hongmei Li ◽  
Qi Chen ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Fusobacterium Nucleatum ◽  
Living Cells ◽  
First Time ◽  
Fluorescent Carbon Dots ◽  
Fluorescent Carbon

Fusobacterium nucleatum has been employed for the first time to synthesize fluorescent carbon dots which could be applied for the determination of Fe3+ ions in living cells and bioimaging in vitro and in vivo with excellent biocompatibility.

Sign in / Sign up

Export Citation Format

Share Document