A novel electrochemical sensor for determination of dopamine based on AuNPs@SiO2 core-shell imprinted composite

2012 ◽  
Vol 38 (1) ◽  
pp. 270-277 ◽  
Author(s):  
Dajun Yu ◽  
Yanbo Zeng ◽  
Yanxia Qi ◽  
Tianshu Zhou ◽  
Guoyue Shi
Keyword(s):  
Electrochemical Sensor ◽  
Core Shell

scholarly journals Rapid and sensitive electrochemical sensor of cross-linked polyaniline/oxidized carbon nanomaterials core-shell nanocomposites for determination of 2,4-dichlorophenol

PLoS ONE ◽  
2020 ◽  
Vol 15 (6) ◽  
pp. e0234815 ◽  
Author(s):  
Dina F. Katowah ◽  
Gharam I. Mohammed ◽  
Dyab A. Al-Eryani ◽  
Tariq R. Sobahi ◽  
Mahmoud A. Hussein
Keyword(s):  
Electrochemical Sensor ◽  
Carbon Nanomaterials ◽  
Core Shell ◽  
Oxidized Carbon

Sensitive determination of catechol using a glassy carbon electrode modified with l-cysteine and ZnS:Ni/ZnS quantum dots

2015 ◽  
Vol 7 (1) ◽  
pp. 260-265 ◽  
Author(s):  
Jianying Qu ◽  
Yong Wang ◽  
Ying Dong ◽  
Zhuanying Zhu ◽  
Huanhuan Xing
Keyword(s):  
Quantum Dots ◽  
Electrochemical Sensor ◽  
Glassy Carbon ◽  
Shell Structure ◽  
Water Soluble ◽  
Core Shell ◽  
Carbon Electrode ◽  
Sensitive Determination ◽  
Core Shell Structure

In this work, water-soluble ZnS:Ni/ZnS quantum dots with core/shell structure were obtained successfully. Based on this, a novel electrochemical sensor for sensitive determination of CC was fabricated.

Development of an electrochemical sensor for the determination of antibiotic sulfamethazine in cow milk using graphene oxide decorated with Cu–Ag core–shell nanoparticles

2021 ◽  
Vol 13 (7) ◽  
pp. 910-917
Author(s):  
Azizallah Feizollahi ◽  
Amir Abbas Rafati ◽  
Parnaz Assari ◽  
Roghayeh Asadpour Joghani
Keyword(s):  
Graphene Oxide ◽  
Electrochemical Sensor ◽  
Dairy Products ◽  
Cow Milk ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Core Shell Nanoparticles

Antibiotic (Sulfamethazine) determination in dairy products by a new electrochemical sensor.

Graphene Modified Molecular Imprinting Electrochemical Sensor for Determining the Content of Dopamine

2019 ◽  
Vol 15 (6) ◽  
pp. 628-634
Author(s):  
Rong Liu ◽  
Jie Li ◽  
Tongsheng Zhong ◽  
Liping Long
Keyword(s):  
Electrochemical Sensor ◽  
Molecular Imprinting ◽  
Neurological Disorders ◽  
Room Temperature ◽  
Low Cost ◽  
Differential Pulse ◽  
Current Response ◽  
Specific Selectivity ◽  
Pulse Voltammetry

Background: The unnatural levels of dopamine (DA) result in serious neurological disorders such as Parkinson’s disease. Electrochemical methods which have the obvious advantages of simple operation and low-cost instrumentation were widely used for determination of DA. In order to improve the measurement performance of the electrochemical sensor, molecular imprinting technique and graphene have always been employed to increase the selectivity and sensitivity. Methods: An electrochemical sensor which has specific selectivity to (DA) was proposed based on the combination of a molecular imprinting polymer (MIP) with a graphene (GR) modified gold electrode. The performance and effect of MIP film were investigated by differential pulse voltammetry (DPV) and cyclic voltammetry (CV) in the solution of 5.0 ×10-3 mol/L K3[Fe(CN)6] and K4[Fe(CN)6] with 0.2 mol/L KCl at room temperature. Results: This fabricated sensor has well repeatability and stability, and was used to determine the dopamine of urine. Under the optimized experiment conditions, the current response of the imprinted sensor was linear to the concentration of dopamine in the range of 1.0×10-7 ~ 1.0×10-5 mol/L, the linear equation was I (µA) = 7.9824+2.7210lgc (mol/L) with the detection limit of 3.3×10-8 mol/L. Conclusion: In this work, a highly efficient sensor for determination of DA was prepared with good sensitivity by GR and great selectivity of high special recognization ability by molecular imprinting membrane. This proposed sensor was used to determine the dopamine in human urine successfully.

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