scholarly journals An electrodeposited molecularly imprinted quartz crystal microbalance sensor sensitized with AuNPs and rGO material for highly selective and sensitive detection of amantadine

RSC Advances ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 6600-6607 ◽  
Author(s):  
Yaguang Yun ◽  
Mingfei Pan ◽  
Guozhen Fang ◽  
Ying Gu ◽  
Wenjun Wen ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Quartz Crystal Microbalance ◽  
Quartz Crystal ◽  
Au Nanoparticles ◽  
Oxide Material ◽  
Molecularly Imprinted ◽  
Quartz Crystal Microbalance Sensor ◽  
Reduced Graphene

In the present work, a new amantadine imprinted quartz crystal microbalance sensor sensitized by Au nanoparticles and reduced graphene oxide material was fabricated by electrodeposition of o-aminothiophenol by cyclic voltammetry scanning.

Selective and Sensitive Determination of Folic Acid Based on Molecularly Imprinted Poly (o-aminophenol) and Reduced Graphene Oxide Decorated with Au Nanoparticles

2020 ◽  
Vol 17 ◽  
Author(s):  
Youyuan Peng ◽  
Xiaojing Zhang
Keyword(s):  
Graphene Oxide ◽  
Folic Acid ◽  
Reduced Graphene Oxide ◽  
Au Nanoparticles ◽  
Water Soluble ◽  
Molecularly Imprinted ◽  
Selective Determination ◽  
Reduced Graphene ◽  
Molecularly Imprinted Film

Background: Folic acid (pteroylglutamic acid, FA), known as a water soluble vitamin of B complex family, plays an important role in the human body. However, excess intake of FA would mask the vitamin B12 deficiency symptoms which may lead to other health risks. Therefore, it is very important to develop a method for the sensitive and selective determination of FA in natural sources, fortified foods and multivitamin preparations. Methods: An electrochemical sensor was fabricated for the analysis of FA, which was based on electropolymerized molecularly imprinted poly (o-aminophenol) film and reduced graphene oxide decorated with Au nanoparticles composites (rGO-AuNPs). Transmission electron microscope, cyclic voltammetry, electrochemical impedance spectroscopy and differential pulse voltammetry were utilized for the characterization of the imprinted polymer film. Results: Under the optimized experimental conditions, the proposed sensor exhibited two distinct linear responses ranging from 0.02 to 0.8 μmol L-1 and 0.8 to 10 μmol L-1 towards the concentrations of FA, and the detection limit was found to be 2.8 nmol L-1 (S/N=3). The molecularly imprinted film proposed was also found to exhibit comparatively high selectivity toward folic acid against structurally similar analogues, and the preparation of the sensor was simple and reproducible. Conclusions: In this work, a molecularly imprinted film fabricated on a rGO-AuNPs modified electrode was developed for the sensitive and selective determination of FA. Furthermore, the method was applied to the detection of FA in infant formula milk, multivitamin tablets and blood serum sample with satisfactory results.

scholarly journals Reduced Graphene Oxide Fibre Electrodes for Drug Sensing

Proceedings ◽  
2021 ◽  
Vol 68 (1) ◽  
pp. 18
Author(s):  
Sutthima Sriprasertsuk ◽  
John R. Varcoe ◽  
Carol Crean
Keyword(s):  
Cyclic Voltammetry ◽  
Graphene Oxide ◽  
Carbon Fibre ◽  
Reduced Graphene Oxide ◽  
Limit Of Detection ◽  
Linear Range ◽  
Oxidation Peak ◽  
Reduced Graphene ◽  
Fibre Sensor ◽  
Model Drug

Reduced graphene oxide (rGO) fibre electrodes and their ability to sense paracetamol (as model drug) were studied. rGO was electrodeposited onto carbon fibre by two different approaches: potentiostatic deposition and cyclic voltammetry (CV) in the presence of graphene oxide solution. Carbon fibre electrodes coated with rGO (after five CV cycles) could sense paracetamol with an oxidation peak at 0.62 V (vs. Ag/AgCl). The limit of detection of this fibre sensor was found to be 36.3 µM with a linear range of 50–500 µM of paracetamol (R2 = 0.9901).

A sensitive sensor based on molecularly imprinted polypyrrole on reduced graphene oxide modified glassy carbon electrode for nevirapine analysis

2021 ◽  
Author(s):  
Bayazid Hassan Pour ◽  
Nahid Haghnazari ◽  
Fatemeh Keshavarzi ◽  
Elahe Ahmadi ◽  
Bahareh Rahimian Zarif
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
Carbon Electrode ◽  
Molecularly Imprinted ◽  
Reduced Graphene ◽  
Electrochemically Reduced Graphene Oxide ◽  
Sensitive Sensor ◽  
Mip Sensor

A molecularly imprinted polymer (MIP) sensor was offered for nevirapine (NVP) analysis based on the electropolymerization of pyrrole (Py) on electrochemically reduced graphene oxide (ErGO) immobilized on a glassy carbon electrode (GCE).

scholarly journals Synthesis and Characterization of Reduced Graphene Oxide/ Polyaniline/Au Nanoparticles Hybrid Material for Energy Applications

2018 ◽  
Author(s):  
Carmina Menchaca-Campos ◽  
Elsa Pereyra-Laguna ◽  
César García-Pérez ◽  
Miriam Flores-Domínguez ◽  
Miguel A. García-Sánchez ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Hybrid Material ◽  
Au Nanoparticles ◽  
Synthesis And Characterization ◽  
Energy Applications ◽  
Reduced Graphene
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