Nafion/Ni(OH)2 nanoparticles-carbon nanotube composite modified glassy carbon electrode as a sensor for simultaneous determination of dopamine and serotonin in the presence of ascorbic acid

Copper/nickel nanoparticle decorated carbon nanotubes for nonenzymatic glucose biosensor

“…S12, it was found that negligible current response was observed for these analytes, comparing to the addition of glucose. This is mainly due to the charge repulsion of Nafion to ascorbic acid, uric acid, and L-cysteine, which usually exist in anionic form [35,36]. All the results demonstrate that the specificity of the CuNi/fMWCNTs/GCE sensor for glucose in the presence of uric acid, ascorbic acid, and L-cysteine is excellent.…”

“…Similar to other polymers used to wrap and solubilize MWCNTs, Nafion bears a polar side chain with a negative charge, which attracts the positively charged Cu 2+ and Ni 2+ ions, facilitating the formation of CuNi/MWCNT hybrid composites in the following electrodeposition process. In addition, the negatively charged Nafion film can readily repel foreign species such as ascorbic acid, paracetamol, and uric acid; as a result, the analytical sensitivity and system versatility are improved [35,36]. Therefore, the use of Nafion as a solubilizing agent for MWCNTs provides a useful avenue for preparing CuNi/ MWCNT-based biosensors.…”

Application of multivariate optimization to electrochemical determination of methyldopa drug in the presence of diclofenac at a nanostructured electrochemical sensor

“…Among them, nanostructured transition metal hydroxides/oxides have excellent properties such as high surface area and enhanced chemical/electrochemical activities, as well [34,35]. Copper hydroxide nanoparticles with a small crystalline size shows a high proton diffusion coefficient, which leads to excellent electrochemical performance.…”

Rod-like hydroxyapatite and Nafion nanocomposite as an electrochemical matrix for simultaneous and sensitive detection of Hg2+, Cu2+, Pb2+ and Cd2+

“…Nafion is a sulfonated tetrafluoroethylene-based fluoropolymer-copolymer, which has been extensively applied as an electrode modifier due to its excellent antifouling capacity, high ion-conductivity, good film-forming ability, high permeability and strong adsorption ability [30, A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT 4 31]. In addition, the hydrophilic negatively charged sulfonate group in Nafion film enables selective accumulation of positively-charged drugs or ions through electrostatic interaction, thus improving the selectivity and sensitivity of electrode interface [32][33]. Then the composite material of HAP-Nafion was applied as an electrode material for the simultaneous detection of four heavy metal ions, including Hg 2+ , Cu 2+ , Pb 2+ and Cd 2+ .…”