Reproducible preparation of a stable polypyrrole-coated-silver nanoparticles decorated polypyrrole-coated-polycaprolactone-nanofiber-based cloth electrode for electrochemical sensor application

Abstract

A piece of conductive cloth has been successfully constructed from polypyrrole-coated silver nanoparticle (Ag@PPy) composites decorated on electrospun polycaprolactone (PCL) nanofibers that formed the core-shell structure of Ag@PPy/PCL@PPy via a photo-induced one-step redox reaction. The photochemical reaction method both accelerated the rate of formation of silver nanoparticles (Ag NPs) and enhanced the dispersion of Ag NPs at the surface of PCL@PPy film. The resulting Ag@PPy/PCL@PPy-based cloth was flexible enough to be cut and pasted onto a glass carbon electrode for the preparation of a biosensor. The resulting biosensor showed good electrochemical activity toward the reduction of H2O2 with low detection limit down to 1 μM (S/N = 3) and wide linear detection ranging from 0.01 mM to 3.5 mM (R(2) = 0.990). This sensor has been applied to detect the trace H2O2 residual in milk. The cloth electrode has been proved to exhibit long-term stability, high selectivity, and excellent reproducibility.

Electrospun Nanofibers for Drug Delivery and Biosensing

“…108 The authors also remarked that the synthetic technique they employ can be readily expanded to detecting other cancer biomarkers and that its potential for ultrasensitive cancer diagnostics is very promising. 108 Core-shell ESNFs have also been fabricated and reported by Li et al 109 and Shen et al 110 as novel H 2 O 2 ECBSs. Li et al constructed a piece of conductive cloth from electrospun polycaprolactone (PCL) NFs decorated with polypyrrole (PPy)-coated silver nanoparticles (Ag@PPy), which formed the core-shell structure of Ag@PPy / PCL@PPy.…”

“…Core–shell ESNFs have also been fabricated and reported by Li et al and Shen et al as novel H 2 O 2 ECBSs. Li et al constructed a piece of conductive cloth from electrospun polycaprolactone (PCL) NFs decorated with polypyrrole (PPy)-coated silver nanoparticles (Ag@PPy), which formed the core–shell structure of Ag@PPy/PCL@PPy.…”

Electrospun CuO-Nanoparticles-Modified Polycaprolactone @Polypyrrole Fibers: An Application to Sensing Glucose in Saliva

“…Electrospinning is one of the most straightforward and cost-effective methods for producing nanofibers in a large scale way and the resultant fibers present the properties of a large surface area and high porosity [ 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 ]. In this study, polypyrrole (PPy) was chosen for electrospinning fabrication and textile electrode preparation because PPy is one of the conducting polymers that show favorable thermal stability, high electrical conductivity and ingenious redox properties as well as environmental stability.…”