Monitoring isoniazid level in human fluids in the presence of theophylline using gold@platinum core@shell nanoparticles modified glassy carbon electrode

2016 ◽  
Vol 230 ◽  
pp. 157-166 ◽  
Author(s):  
N.S.K. Gowthaman ◽  
Srinivasan Kesavan ◽  
S. Abraham John
Keyword(s):  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
Core Shell ◽  
Carbon Electrode ◽  
Modified Glassy Carbon Electrode ◽  
Shell Nanoparticles ◽  
Core Shell Nanoparticles ◽  
Human Fluids ◽  
Gold Platinum

Modification of a glassy carbon electrode with gold–platinum core–shell nanoparticles by electroless deposition and their electrocatalytic activity

RSC Advances ◽  
2015 ◽  
Vol 5 (53) ◽  
pp. 42369-42375 ◽  
Author(s):  
N. S. K. Gowthaman ◽  
S. Abraham John
Keyword(s):  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
Electroless Deposition ◽  
Core Shell ◽  
Carbon Electrode ◽  
Deposition Method ◽  
Electrocatalytic Reduction ◽  
Shell Nanoparticles ◽  
Core Shell Nanoparticles ◽  
Gold Platinum

Gold@platinum core–shell nanoparticles were modified on a glassy carbon electrode by an electroless deposition method and then used for the electrocatalytic reduction of dioxygen and oxidation of hydrazine.

scholarly journals Au-PDA@SiO2 core-shell nanospheres decorated rGO modified electrode for electrochemical sensing of cefotaxime

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
M. Z. H. Khan ◽  
M. Daizy ◽  
C. Tarafder ◽  
X. Liu
Keyword(s):  
Electron Microscopy ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
Modified Electrodes ◽  
Core Shell ◽  
Carbon Electrode ◽  
Modified Glassy Carbon Electrode ◽  
Reduced Graphene

AbstractIn this work, we have successfully synthesized core-shell structured Au-PDA@SiO2 nanospheres and decorated on reduced graphene oxide (rGO) modified glassy carbon electrode for the electrochemical detection of cefotaxime. The one-pot hydrothermal method was used to synthesis core-shell nanostructures by loading Au nanoparticles on polydopamine (PDA) coated SiO2 nanospheres. The as-prepared Au-PDA@SiO2 nanospheres were used to fabricate electrochemically reduced graphene oxide (rGO) modified glassy carbon electrode (Au-PDA@SiO2/rGO/GCE) for electrochemical determination of cefotaxime. Scanning electron microscopy, powder x-ray diffraction, transmission electron microscopy, and Fourier-transform infrared spectroscopy were used to confirm the structure and morphology of the as-prepared nanospheres. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) were performed for electrochemical characterizations different modified electrodes. It was revealed that the nanocomposite modified electrodes exhibited excellent electrochemical performances for electrooxidation of target analytes and could achieve ultra-sensitive detections. A linear relationship was observed between peak currents and concentrations in the ranges of 1.0 × 10−9 to 5.0 × 10−8 M (R2 = 0.9877), and 1.0 × 10−7 to 5.0 × 10−6 M (R2 = 0.9821) for cefotaxime with a detection limit (S/N = 3) of 1.0 × 10−10 M. It can be deduced that the proposed sensor is suitable for the sensitive detection of cefotaxime in pharmaceutical samples.

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