scholarly journals N-doped carbon dots from phenol derivatives for excellent colour rendering WLEDs

RSC Advances ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 4850-4856 ◽  
Author(s):  
Qian Liu ◽  
Danting Li ◽  
Zhifeng Zhu ◽  
Shimeng Yu ◽  
Yan Zhang ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Quantum Yields ◽  
White Leds ◽  
Phenol Derivatives ◽  
Doped Carbon Dots ◽  
Colour Rendering ◽  
Green Photoluminescence

Yellow-green photoluminescence carbon dots with different quantum yields were realized and used to fabricate white LEDs.

Green and Orange Emissive Carbon Dots with High Quantum Yields Dispersed in Matrices for Phosphor-Based White LEDs

2020 ◽  
Vol 8 (8) ◽  
pp. 3151-3161 ◽  
Author(s):  
Panpan Ma ◽  
Xiaobo Sun ◽  
Wei Pan ◽  
Guifeng Yu ◽  
Jinping Wang
Keyword(s):  
Carbon Dots ◽  
Quantum Yields ◽  
White Leds ◽  
High Quantum

Enhanced Photoluminescence Properties of Carbon Dots by Doping with Europium

2016 ◽  
Vol 16 (4) ◽  
pp. 3735-3738 ◽  
Author(s):  
Yuan Chen ◽  
Jiafu Xu ◽  
Bitao Liu ◽  
Jiyun Li ◽  
Xiaomei Fang ◽  
...  
Keyword(s):  
Particle Size ◽  
Polyethylene Glycol ◽  
Small Particle ◽  
Carbon Dots ◽  
Quantum Yields ◽  
Small Particle Size ◽  
Photoluminescence Properties ◽  
Enhanced Photoluminescence ◽  
Potential Applications ◽  
Doped Carbon Dots

Europium (Eu) doped carbon dots (CDs) were synthesized via a rapid and simple microwave mediated method using polyethylene glycol (PEG) as a precursor, and characterized in detail. The results were that these as-prepared CDs showed a uniform and small particle size, and exhibit good photostability and high photoluminescence quantum yields. Additionally, it also found that the doped Eu would change the fluorescence properties, which indicates potential applications in the field of biolabeling.

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.

Heteroatom Doped Carbon Dots with Nanoenzyme Like Properties as Theranostic Platforms for Free Radical Scavenging, Imaging, and Chemotherapy

2020 ◽  
Author(s):  
Khalilalrahman Dehvari ◽  
Sheng-Hui Chiu ◽  
Jin-Sheng Lin ◽  
Wubshet Mekonnen Girm ◽  
Yong-Chien Ling ◽  
...  
Keyword(s):  
Free Radical ◽  
Carbon Dots ◽  
Radical Scavenging ◽  
Free Radical Scavenging ◽  
Doped Carbon Dots

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

scholarly journals Microwave-Assisted Preparation of Luminescent Inorganic Materials: A Fast Route to Light Conversion and Storage Phosphors

Molecules ◽  
2021 ◽  
Vol 26 (10) ◽  
pp. 2882
Author(s):  
José Miranda de Carvalho ◽  
Cássio Cardoso Santos Pedroso ◽  
Matheus Salgado de Nichile Saula ◽  
Maria Claudia França Cunha Felinto ◽  
Hermi Felinto de Brito
Keyword(s):  
Rapid Heating ◽  
Inorganic Materials ◽  
Rapid Screening ◽  
Conventional Heating ◽  
Quantum Yields ◽  
Microwave Assisted Synthesis ◽  
Volumetric Heating ◽  
White Leds ◽  
Microwave Assisted ◽  
And Storage

Luminescent inorganic materials are used in several technological applications such as light-emitting displays, white LEDs for illumination, bioimaging, and photodynamic therapy. Usually, inorganic phosphors (e.g., complex oxides, silicates) need high temperatures and, in some cases, specific atmospheres to be formed or to obtain a homogeneous composition. Low ionic diffusion and high melting points of the precursors lead to long processing times in these solid-state syntheses with a cost in energy consumption when conventional heating methods are applied. Microwave-assisted synthesis relies on selective, volumetric heating attributed to the electromagnetic radiation interaction with the matter. The microwave heating allows for rapid heating rates and small temperature gradients yielding homogeneous, well-formed materials swiftly. Luminescent inorganic materials can benefit significantly from the microwave-assisted synthesis for high homogeneity, diverse morphology, and rapid screening of different compositions. The rapid screening allows for fast material investigation, whereas the benefits of enhanced homogeneity include improvement in the optical properties such as quantum yields and storage capacity.

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