An electrochemical sensor based on reduced graphene oxide decorated with polypyrrole nanofibers and zinc oxide–copper oxide p–n junction heterostructures for the simultaneous voltammetric determination of ascorbic acid, dopamine, paracetamol, and tryptophan

2018 ◽  
Vol 42 (11) ◽  
pp. 8512-8523 ◽  
Author(s):  
Kh. Ghanbari ◽  
S. Bonyadi
Keyword(s):  
Ascorbic Acid ◽  
Zinc Oxide ◽  
Graphene Oxide ◽  
Electrochemical Sensor ◽  
Three Dimensional ◽  
Voltammetric Determination ◽  
Reduced Graphene ◽  
Simultaneous Voltammetric Determination ◽  
Porous Nanocomposite

A three-dimensional porous nanocomposite was fabricated and used for the simultaneous voltammetric determination of ascorbic acid, dopamine, paracetamol, and tryptophan.

Reduced graphene oxide/platinum nanoparticles/nafion nanocomposite as a novel 2D electrochemical sensor for voltammetric determination of aliskiren

2017 ◽  
Vol 41 (24) ◽  
pp. 15320-15326 ◽  
Author(s):  
Ali Kemal Ateş ◽  
Engin Er ◽  
Hüseyin Çelikkan ◽  
Nevin Erk
Keyword(s):  
Graphene Oxide ◽  
Electrochemical Sensor ◽  
Reduced Graphene Oxide ◽  
Platinum Nanoparticles ◽  
Biological Samples ◽  
Voltammetric Determination ◽  
Renin Inhibitors ◽  
Reduced Graphene ◽  
Highly Sensitive

A highly sensitive and selective 2D electrochemical sensor based on an rGO/PtNPs/NFN nanocomposite was developed for routine detection of renin inhibitors such as aliskiren in biological samples.

Direct Electrodeposition to Fabricate Vertically-Oriented Graphene Nanosheets Modified Electrode and its Application for Determination of Levodopa in the Presence of Uric Acid and Ascorbic Acid

NANO ◽  
2017 ◽  
Vol 12 (07) ◽  
pp. 1750087 ◽  
Author(s):  
Yanju Wu ◽  
Huijun Song ◽  
Kui Lu ◽  
Yong Ye ◽  
Mingxiu Lv ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Uric Acid ◽  
Graphene Oxide ◽  
Electrochemical Sensor ◽  
Modified Electrode ◽  
Graphene Nanosheets ◽  
Potential Method ◽  
Vertical Orientation ◽  
Reduced Graphene

The electrodeposition of reduced graphene oxide (rGO) film with preferred vertical orientation was fabricated on a glassy carbon electrode by using pulse potential method in a graphene oxide solution. The rGO film was applied in developing a high-sensitive electrochemical sensor for detection of levodopa (L-dopa). The new electrochemical sensor displayed a significant response to L-dopa because of its excellent electric conductivity and large specific surface area. Moreover, the determination of L-dopa on this modified electrode was not interfered by the coexistence of ascorbic acid (AA) and uric acid (UA). Under the selective conditions, the modified electrode showed a linear voltammetric response to L-dopa within a certain concentration ranging from [Formula: see text][Formula: see text] mol L[Formula: see text], with the detection limit of [Formula: see text] mol L[Formula: see text]. Besides, the modified electrode also exhibited an excellent selectivity, stability, reproducibility and repeatability.

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