An “on–off–on” fluorescent nanoprobe for recognition of Cu2+ and GSH based on nitrogen co-doped carbon quantum dots, and its logic gate operation

2019 ◽  
Vol 11 (20) ◽  
pp. 2650-2657 ◽  
Author(s):  
Yifang Gao ◽  
Huilin Zhang ◽  
Shaomin Shuang ◽  
Hui Han ◽  
Chuan Dong
Keyword(s):  
Quantum Dots ◽  
Carbon Dots ◽  
Logic Gate ◽  
Carbon Quantum Dots ◽  
Gate Operation ◽  
Fluorescent Nanoprobe ◽  
Highly Sensitive ◽  
Doped Carbon Dots ◽  
Co Doped

Novel nitrogen co-doped carbon dots (NCDs) were synthesized as a fluorescent “on–off–on” switch for the highly sensitive and selective sensing of Cu2+ and glutathione (GSH) by a straightforward pyrolysis route.

A green one-pot synthesis of nitrogen and sulfur co-doped carbon quantum dots for sensitive and selective detection of cephalexin

2017 ◽  
Vol 95 (6) ◽  
pp. 641-648 ◽  
Author(s):  
Farhad Akhgari ◽  
Naser Samadi ◽  
Khalil Farhadi ◽  
Mehrdad Akhgari
Keyword(s):  
Quantum Dots ◽  
Carbon Dots ◽  
Limit Of Detection ◽  
Carbon Quantum Dots ◽  
Water Soluble ◽  
Soluble Nitrogen ◽  
Selective Detection ◽  
Photoluminescence Intensity ◽  
Doped Carbon Dots ◽  
Co Doped

The article reports a simple, economic, and green method for preparing water-soluble, nitrogen and sulfur co-doped carbon quantum dots via a one-step hydrothermal method. Pomegranate juice served as the carbon source, and the L-cysteine provided nitrogen and sulfur. Co-doped carbon dots were characterized by X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), and Fourier transform infrared (FTIR) spectroscopy techniques. The co-doped carbon dots served as fluorescent probes for sensitive and selective detection of cephalexin. Briefly, the co-doped carbon dot systems showed quenching of photoluminescence intensity in the presence of cephalexin. The decrease of fluorescence intensity made it possible to analyze cephalexin with satisfactory detection limits and linear ranges. The Sterne–Volmer plot showed a linear relationship (R2 = 0.998) between F0/F and the concentration of cephalexin over the range from 0.3 to 10 μmol L−1. The limit of detection (LOD) was estimated to be 1 × 10−7 mol L−1 (at a signal to noise ratio of 3). To validate the applicability, the described method was successfully applied for the detection of cephalexin in human urine and raw milk samples.

A ratiometric fluorescence platform composed of MnO2 nanosheets and nitrogen, chlorine co-doped carbon dots and its logic gate performance for glutathione determination

2021 ◽  
Author(s):  
Fujuan Bai ◽  
Haiwei Wang ◽  
Longyi Lin ◽  
Longshan Zhao
Keyword(s):  
Carbon Dots ◽  
Logic Gate ◽  
Ratiometric Fluorescence ◽  
Mno2 Nanosheets ◽  
Selective Determination ◽  
The Absolute ◽  
Doped Carbon Dots ◽  
Glutathione Determination ◽  
Absolute Fluorescence ◽  
Co Doped

Herein, a ratiometric fluorescence strategy based on the MnO2 nanosheets and nitrogen, chlorine co-doped carbon dots (N, Cl-CDs) was constructed for selective determination glutathione (GSH) and the absolute fluorescence quantum...

Bright-green-emissive nitrogen-doped carbon dots as a nanoprobe for bifunctional sensing, its logic gate operation and cellular imaging

Talanta ◽  
2018 ◽  
Vol 179 ◽  
pp. 554-562 ◽  
Author(s):  
Fangfang Du ◽  
Xiaojuan Gong ◽  
Wenjing Lu ◽  
Yang Liu ◽  
Yifang Gao ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Logic Gate ◽  
Cellular Imaging ◽  
Gate Operation ◽  
Nitrogen Doped ◽  
Bright Green ◽  
Doped Carbon Dots ◽  
Nitrogen Doped Carbon

Cuttlefish ink-based N and S co-doped carbon quantum dots as fluorescent sensor for highly sensitive and selective para-nitrophenol detection

2021 ◽  
Author(s):  
Xiaotong Huang ◽  
Chunli Yang ◽  
Yingxin Chen ◽  
Zebin Zhu ◽  
Lihua Zhou
Keyword(s):  
Quantum Dots ◽  
Organic Synthesis ◽  
Fluorescent Sensor ◽  
Environmental Problems ◽  
Carbon Quantum Dots ◽  
Raw Material ◽  
Highly Sensitive ◽  
Co Doped

Para-nitrophenol (PNP) is an important raw material for organic synthesis and its extensive use has produced a series of environmental problems. Here, we develop a highly sensitive and selective fluorescent...

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