期刊
BIOSENSORS & BIOELECTRONICS
卷 186, 期 -, 页码 -出版社
ELSEVIER ADVANCED TECHNOLOGY
DOI: 10.1016/j.bios.2021.113285
关键词
Silicon carbide nanoparticles; Conductive polymer; Glucose oxidase enzyme; Electrospun nanofibrous membrane; Electrochemical; Biosensor
类别
资金
- University of South Florida (USF) Graduate School Signature Doctoral Research Fellowship
- USF Nanotechnology Research and Education Center (NREC)
This study presents an electrochemical enzymatic glucose sensor with SiCNPs-ENFM nanostructure, which can detect glucose concentration with high sensitivity and good stability.
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 mu A/mM cm2 and the detection limit was 0.56 mu M. The lower change in current response for SiCNPs-ENFM based glucose sensing electrodes was observed for a 50 day period.
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