Enzymeless Electrochemical Glucose Sensor Based On Carboxylated Multiwalled Carbon Nanotubes Decorated With Nickel (Ii) Electrocatalyst And Self-Assembled Molecularly Imprinted Polyethylenimine

In this paper a new enzymeless electrochemical glucose sensor based on carboxylated multiwalled carbon nanotubes (cMWCNT) with immobilized nickel (II) acetylacetonate (NiL) as electrocatalyst and molecularly imprinted polymer fabricated through electrostatic self-assembling of polyethyleneimine (PEI) crosslinked with glutaric dialdehyde (GDA). The electrocatalytic properties of NiL and PEI-cMWCNT, PEI-GDA and PEI-glucose interactions is studied for the first time. Developed sensor demonstrates excellent electrocatalytic activity towards glucose oxidation and possessing high stability, sensitivity of 5897.42 +/- 161.00 mu A . mM(-1) cm(-2), LOD of 0.138 mM and high selectivity in the presence of creatinine, L-alanine, glycine, D-glutamine, uric acid, L-ascorbic acid, urea and BSA.