Electrophoretic Deposition of Carbon Nanofibers/Co(OH)2 Nanocomposites: Application for Non-Enzymatic Glucose Sensing

The synthesis of carbon nanofibers (CNFS)/Co(OH)(2) nanocomposites for non-enzymatic electrochemical sensing of glucose is presented. The sensing matrix was fabricated by electrophoretic deposition of a mixture of Co(NO3)(2) and CNFS in ethanol at 50V for 2min onto gold electrodes. The formed CNFS/Co(OH)(2) matrix was characterised by X-ray photoelectron spectroscopy, scanning electron microscopy and cyclic voltammetry. Its electrocatalytic properties towards the oxidation of glucose in 0.1M NaOH were tested. A detection limit of 5 mu M with linearity of 10 mu M to 0.12mM was obtained. The current response was selective towards glucose and stable over time. The good analytical performance of the nanocomposite allowed for sensing glucose in real human serum samples.