Copper Nanowires/Reduced Graphene Oxide Nanocomposite Based Non-Enzymatic Glucose Sensor

摘要

The work was aimed to prepare and characterize a binder-free, low cost, linear and sensitive non-enzymatic glucose (NEG) sensor. An enzyme-free glucose sensor was prepared by spin coating a nanocomposite solution consisting of one-dimensional copper nanowires and two-dimensional reduced graphene oxide nanosheets (CuNWs/rGO) on an ITO coated glass substrate. One dimensional smooth and uniform copper nanowires with an average diameter of 100 nm and length $mathbf{10} mumathbf{m}$ anchored to reduced graphene oxide nanosheets were synthesized as illustrated from FESEM results. The crystallite size of the CuNWs/rGO nanocomposite obtained from XRD results was in the range 16–31 nm. The EDX results indicated the presence of copper, carbon, and oxygen in different proportions in the nanocomposite. The CV results showcased an electrocatalytic ability of the prepared nanocomposite. The prepared CuNWs/rGO/ITO electrode exhibited a high sensitivity of $mathbf{9.3} mumathbf{A}$ mM⁻¹ cm⁻²in linear glucose range 0–5 mM.