Fabrication of a fluorescent sensor by organogelation: CdSe/ZnS quantum dots embedded molecularly imprinted organogel nanofibers

2016 ◽  
Vol 234 ◽  
pp. 122-129 ◽  
Author(s):  
Youngdo Kim ◽  
Ji Young Chang
The Analyst ◽  
2014 ◽  
Vol 139 (22) ◽  
pp. 5785-5792 ◽  
Author(s):  
Fangdi Wei ◽  
Yanzi Wu ◽  
Guanhong Xu ◽  
Yankun Gao ◽  
Jing Yang ◽  
...  

A fluorescent sensor with recognition ability for norepinephrine was simply prepared and actually used to determine norepinephrine in rat plasma.


2020 ◽  
Vol 1124 ◽  
pp. 113-120 ◽  
Author(s):  
Kang Luo ◽  
Haicheng Chen ◽  
Qing Zhou ◽  
Zhihong Yan ◽  
Zhengquan Su ◽  
...  

Biosensors ◽  
2018 ◽  
Vol 8 (3) ◽  
pp. 82 ◽  
Author(s):  
Tongchang Zhou ◽  
Arnab Halder ◽  
Yi Sun

In this work, we developed a novel fluorescent sensor by combining molecularly imprinted polymers (MIPs) with graphene quantum dots (GQDs) for the determination of tetracycline (TC) in aqueous samples. Firstly, we developed a one-pot green method to synthesize GQDs as the fluorescent probes. GQDs with carboxyl groups or amino groups were fabricated. It was found that carboxyl groups played an important role in the fluorescence quenching. Based on these findings, the GQDs-MIPs microspheres were prepared using a sol-gel process. GQDs-MIPs showed strong fluorescent emission at 410 nm when excited at 360 nm, and the fluorescence was quenched in the presence of TC. Under optimum conditions, the fluorescence intensity of GQDs-MIPs decreased in response to the increase of TC concentration. The linear rage was from 1.0 to 104 µg·L−1, and the limit of detection was determined to be 1 µg·L−1. The GQDs-MIPs also demonstrated high selectivity towards TC. The fluorescent sensor was successfully applied for the detection of TC in real spiked milk samples.


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