Silicon carbide nanoparticles electrospun nanofibrous enzymatic glucose sensor

This paper presents an electrospun-nanofibrous-membrane (ENFM) of silicon carbide nanoparticles (SiCNPs) with a conductive polymer (CP) for an electrochemical enzymatic glucose sensor. The surface area of a fiber matrix is a key physical property of a nanofiber membrane for enzyme binding. It is found that glucose sensing electrodes, having a SiCNPs-ENFM nanostructure, show enhanced binding of glucose oxidase (GOx) enzyme within the fibrous membrane. Morphological characterization of SiCNPs based ENFM was performed by using scanning electron microscopy (SEM) and using transmission electron microscopy (TEM) for SiC nanoparticles. The electrochemical analysis of SiCNPs-ENFM electrode was conducted by using cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and chronoamperometry (CA) methods. Glucose concentration was detected at +0.6 V in a 5 mM potassium ferricyanide electrolyte. SiCNPs-ENFM based glucose electrodes show a detection range from 0.5 mM to 20 mM concentration with the sensitivity of 30.75 μA/mM cm2 and the detection limit was 0.56 μM. The lower change in current response for SiCNPs-ENFM based glucose sensing electrodes was observed for a 50 day period. •Demonstrated silicon carbide nanoparticles embedded electrospun nanofibrous membrane based glucose sensor electrode.•Morphological characterization of SiCNPs-ENFM electrode shows binding of the GOx enzyme within the fibrous membrane.•Electrochemical analysis proved that SiCNPs-ENFM electrode provides enhanced sensitivity, limit of detection, and durability.•SiCNPs-ENFM encouraging the application of nanofibers for the fabrication of potential biosensor in future.