Electro-oxidative polymerization of phenothiazine dyes into a multilayer-containing carbon nanotube on a glassy carbon electrode for the sensitive and low-potential detection of NADH

Comparative investigation of NADH electrooxidation at graphite electrodes modified with two new phenothiazine derivatives

“…The mediators for NADH electrochemical oxidation were immobilized on the electrode surface by: (i) covalent attachment [8,9]; (ii) electrochemical polymerization [10,11]; (iv) via entrapment in polymeric matrices [12]; incorporation in carbon paste [13]; (v) adsorption [14][15][16]; (vi) self-assembling [17][18][19][20]. Among these techniques, the adsorption of electrocatalytical active species onto carbonaceous electrode materials represents a simple and inexpensive procedure, leading to modified electrodes highly suitable for NADH electrocatalytic oxidation.…”

Electroanalytical Characterisation of Dopa Decarboxylase Inhibitors Carbidopa and Benserazide on Multiwalled Carbon Nanotube and Poly(Nile blue A) Modified Glassy Carbon Electrodes

“…The irreversible oxidation peak at ∼0.9 V is due to formation of the monomer radical (Figure 1). Peak currents for the electropolymerisation of NB onto MWCNT coatings were much higher than those of on the surface of the GC electrode, since modification by MWCNT leads to a larger electroactive surface area [15,24,25]. …”

“…Single-(SWCNT) and multiwalled (MWCNT) carbon nanotubes have a great interest due to their properties such as high electrical conductivity, chemical stability, high surface area, and insolubility in all solvents [14,15]. The unique and one-dimensional structures of carbon nanotubes lead them to be used in sensors and biosensors [16][17][18][19].…”

Electrocatalysis of NADH oxidation using electrochemically activated fluphenazine on carbon nanotube electrode

“…The interest in NADH determination is connected with the fact that it is the cofactor for a large number of dehydrogenase enzymes and plays an important role in the electron transfer chain in biological systems. Therefore, it is used in the construction of biosensors, in the food industry, environmental monitoring and medical analysis [12][13][14][15][16][17][18][19].…”