fluorescent carbon dots
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2022 ◽  
Author(s):  
Shiqi Liuye ◽  
Shiqiang Cui ◽  
Mengmeng Lu ◽  
Shouzhi Pu

Abstract Photo-controlled fluorescent switching is of great utility in fluorescence sensors, reversible data storage, and logic circuit, based on their modifiable emission intensity and spectra. In this work, a novel photo-controlled reversible fluorescent switching system was constructed based on photochromic diarylethene (DT) molecular modified fluorescent carbon dots (CDs). The fluorescent CDs acted as fluorescent donors and the photochromic diarylethene molecular functioned as acceptors in this fluorescent switching system. The fluorescence modulation efficiency of the fluorescent switching was determined to be 97.1%. The result was attributable to Förster resonance energy transfer (FRET) between the CDs and the diarylethene molecular. The fluorescent switching could undergo 20 cycles without significant decay.


Carbon ◽  
2022 ◽  
Author(s):  
Junli Wang ◽  
Jingxia Zheng ◽  
Yongzhen Yang ◽  
Xuguang Liu ◽  
Jieshan Qiu ◽  
...  

2022 ◽  
Author(s):  
Xiao Gong ◽  
Wenjing Li ◽  
Min Wu ◽  
Hang Jiang ◽  
Longhui Yang ◽  
...  

A facile synthesis approach to prepare eco-friendly white fluorescent carbon dots (CDs)/ZnO quantum dots (QDs) composites through electrostatic force was proposed, which can be used for fabrication of high-performance white...


Nanomaterials ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 66
Author(s):  
Hweiyan Tsai ◽  
Kaiying Chang ◽  
Wanshing Lee ◽  
C. Bor Fuh

Fluorescent carbon dots with blue, green, and red emissions were rapidly prepared from modified pine needles through microwave irradiation in a one-pot reaction. The fluorescence intensity and emission versatility for a carbon source were experimentally optimized. The reaction times were under 10 min and the reaction temperatures were lower than 220 °C. Potential applications of magnetic fluorescence-linked immunoassays of carcinoembryonic antigen (CEA) and tumor necrosis factor-alpha (TNF-α) were presented. The detection limits for CEA and TNF-α (3.1 and 2.8 pg mL−1, respectively) are lower than those presented in other reports, whereas the linear ranges for CEA and TNF-α (9 pg mL−1 to 18 ng mL−1 and 8.5 pg mL−1 to 17 ng mL−1, respectively) are wider than those presented in other reports. Magnetic immunoassays with fluorescent CDs prepared from pine needles can enable rapid, sensitive, and selective detections for biochemical analysis.


2021 ◽  
Vol 17 (S2) ◽  
Author(s):  
Nayomi S Camilus ◽  
Sarah Lucas ◽  
Colin Wu ◽  
Rafik Naccache ◽  
Sanela Martic

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