A novel molecularly imprinted electrochemical sensor based on graphene quantum dots coated on hollow nickel nanospheres with high sensitivity and selectivity for the rapid determination of bisphenol S

2018 ◽  
Vol 100 ◽  
pp. 341-347 ◽  
Author(s):  
Hanbing Rao ◽  
Xun Zhao ◽  
Xin Liu ◽  
Ji Zhong ◽  
Zhaoyi Zhang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Electrochemical Sensor ◽  
Rapid Determination ◽  
Graphene Quantum Dots ◽  
High Sensitivity ◽  
Bisphenol S ◽  
Molecularly Imprinted ◽  
Sensitivity And Selectivity

scholarly journals Highly Selective Electrochemiluminescence Sensor Based on Molecularly Imprinted-quantum Dots for the Sensitive Detection of Cyfluthrin

Sensors ◽  
2020 ◽  
Vol 20 (3) ◽  
pp. 884 ◽  
Author(s):  
Jinjin Xu ◽  
Rongrong Zhang ◽  
Chenxi Liu ◽  
Aili Sun ◽  
Jiong Chen ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Rapid Determination ◽  
High Sensitivity ◽  
Multiwall Carbon Nanotube ◽  
Molecularly Imprinted ◽  
Grafting Technique ◽  
Seawater Samples ◽  
Multiwall Carbon ◽  
High Sensitivity Detection

A highly selective and sensitive molecularly imprinted electrochemiluminescence (MIECL) sensor was developed based on the multiwall carbon nanotube (MWCNT)-enhanced molecularly imprinted quantum dots (MIP-QDs) for the rapid determination of cyfluthrin (CYF). The MIP-QDs fabricated by surface grafting technique exhibited excellent selective recognition to CYF, resulting in a specific decrease of ECL signal at the MWCNT/MIP-QD modified electrode. Under optimal conditions, the MIECL signal was proportional to the logarithm of the CYF concentration in the range of 0.2 µg/L to 1.0 × 103 µg/L with a determination coefficient of 0.9983. The detection limit of CYF was 0.05 µg/L, and good recoveries ranging from 86.0% to 98.6% were obtained in practical samples. The proposed MIECL sensor provides a novel, rapid, high sensitivity detection strategy for successfully analyzing CYF in fish and seawater samples.

Electrochemical Sensor Based on Molecularly Imprinted Carbon Nanotubes for Selective Determination of Bisphenol A

2013 ◽  
Vol 303-306 ◽  
pp. 170-179
Author(s):  
Hui Min Zhao ◽  
Ya Qiong Chen ◽  
Hong Bo Cheng ◽  
Fang Yuan ◽  
Xie Quan
Keyword(s):  
Carbon Nanotubes ◽  
Bisphenol A ◽  
Electrochemical Sensor ◽  
High Sensitivity ◽  
Molecularly Imprinted ◽  
Multi Wall Carbon Nanotubes ◽  
Selective Determination ◽  
Sensitivity And Selectivity ◽  
Modified Sensor

Based on the unique electronic properties and high adsorption capacity of carbon nanotubes, as well as the specific recognition ability of molecularly imprinted polymers, a novel molecularly imprinted carbon nanotubes electrochemical sensor with high sensitivity and selectivity was developed for bisphenol A (BPA) determination in water. The sensor was fabricated by directly thermalpolymerising molecularly imprinted film on a multi-wall carbon nanotubes (MWNTs) modified glassy carbon electrode (GCE). The linear sweep voltammogram of BPA on this sensor exhibited a well defined anodic peak. Under optimum conditions, the oxidation peak currents were linear to the concentration of BPA in the range of 0.1 mg/L-10.0 mg/L with a correlation coefficient of 0.9987 and a detection limit of 24.2 μg/L (S/N = 3). The proposed electrode exhibited good sensitivity and selectivity, and provided operation and store stability for the determination of BPA. The experiment results indicated a good potential application of the modified sensor in the detection of BPA.

Graphene quantum dots supported by graphene oxide as a sensitive fluorescence nanosensor for cytochrome c detection and intracellular imaging

2017 ◽  
Vol 5 (31) ◽  
pp. 6300-6306 ◽  
Author(s):  
Lin Cao ◽  
Xiangqing Li ◽  
Lixia Qin ◽  
Shi-Zhao Kang ◽  
Guodong Li
Keyword(s):  
Quantum Dots ◽  
Graphene Oxide ◽  
Cytochrome C ◽  
Graphene Quantum Dots ◽  
A549 Cells ◽  
High Sensitivity ◽  
Fluorescence Sensor ◽  
Intracellular Imaging ◽  
New Class ◽  
Sensitivity And Selectivity

A new class of Cyt c detection fluorescence sensor based on graphene quantum dots supported by graphene oxide has been facilely developed. The sensor shows a high sensitivity and selectivity for Cyt c detection, and further exhibits favorable intracellular imaging in A549 cells.

A glassy carbon electrode based on graphene quantum dots (GQDs) for simultaneous detection of acetaminophen and ascorbic acid

2015 ◽  
Vol 7 (20) ◽  
pp. 8877-8881 ◽  
Author(s):  
Chengfei Zhao ◽  
Zong'en Liu ◽  
Wentan Xu ◽  
Min Chen ◽  
Shaohuang Weng ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Ascorbic Acid ◽  
Citric Acid ◽  
Electrochemical Sensor ◽  
Glassy Carbon ◽  
Graphene Quantum Dots ◽  
Simultaneous Detection ◽  
Carbon Electrode ◽  
Pyrolysis Method

In this present work, graphene quantum dots (GQDs) were handily prepared with citric acid by the pyrolysis method and used to fabricate an electrochemical sensor for the simultaneous determination of acetaminophen (AC) and ascorbic acid (AA) in compound preparation.

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