scholarly journals Rapid Detection of Ascorbic Acid Based on a Dual-Electrode Sensor System Using a Powder Microelectrode Embedded with Carboxyl Multi-Walled Carbon Nanotubes

Sensors ◽  
2017 ◽  
Vol 17 (7) ◽  
pp. 1549 ◽  
Author(s):  
◽  
Keyword(s):  
Carbon Nanotubes ◽  
Ascorbic Acid ◽  
Rapid Detection ◽  
Sensor System ◽  
Electrode Sensor ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Powder Microelectrode

Simultaneous determination of ascorbic acid, dopamine, uric acid and hydrogen peroxide based on co-immobilization of PEDOT and FAD using multi-walled carbon nanotubes

2014 ◽  
Vol 6 (20) ◽  
pp. 8321-8327 ◽  
Author(s):  
Kuo Chiang Lin ◽  
Jia Yan Huang ◽  
Shen Ming Chen
Keyword(s):  
Carbon Nanotubes ◽  
Hydrogen Peroxide ◽  
Ascorbic Acid ◽  
Uric Acid ◽  
Simultaneous Determination ◽  
High Conductivity ◽  
Hybrid Films ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Illustration of electro-codeposition of PEDOT and FAD hybrid films using high conductivity and steric MWCNTs as a template.

Enhanced Sensitivity of Electrochemical Biosensor on Microfluidic Paper Based Analytical Device Using Zno/MWCNTS Nanocomposite

2019 ◽  
Vol 9 (02) ◽  
Author(s):  
Roekmono . ◽  
Harsono Hadi1 ◽  
Luthviyah Choirotul Muhimmah1 ◽  
Ruri Agung Wahyuono ◽  
Hilya Nur Imtihani ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Ascorbic Acid ◽  
Electrochemical Biosensor ◽  
Glucose Measurement ◽  
Present System ◽  
Current Response ◽  
Enhanced Sensitivity ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Analytical Device

This paper presents an integrated ZnO/multi-walled carbon nanotubes (MWCNTs) electrode in novel stacking paper-based microfluidic analytical device for electrochemical biosensor. The designed sensors were subjected to detect glucose and ascorbic acid in a simulated body fluid using electrochemical methods, including cyclic voltammetry and impedance spectroscopy. The composite of ZnO/multi-walled carbon nanotubes (MWCNTs) with variations in mass fractions of 0.1, 0.5, 1, 2, 4 and 8% MWCNTs for measuring ascorbic acid and glucose with concentrations spanning from 0.02 to 5.12mM. The best results are obtained by 2% of MWCNTs in composited electrode, in which linear characteristics (R2>0.8) of the current response value show a sensitivity (gradient) of 0.017 and 0.085 µA/mM.cm2 for ascorbic acid and glucose measurement, respectively. The electrochemical detection by means of impedance spectra shows a linearly decreasing trend of chemical capacitance with increasing concentration of glucose and ascorbic acid. However, in the present system it is not sufficient to specifically distinguish the frequency response associated to glucose and ascorbic acid.

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