Fabrication of poly(alizarin red)-carbon nanofibers composite film and its application in developing nitric oxide microsensor

摘要

In this work, a simple method for the stable dispersion of carbon nanofibers (CNFs) in water by alizarin red and controllable surface addition onto carbon fiber microelectrodes (CFE) via electropolymerization is reported. We have characterized these poly(alizarin red S)-carbon nanofiber (PARS-CNF) composite films, with techniques including scanning electron microscopy (SEM), infrared spectroscopy (IR) and voltammetry. These investigations showed that the films have loose three-dimensional structure with plenty of dispersed CNFs. This PARS-CNF composite-modified CFE (PARS-CNF/CFE) exhibited good electrocatalytic ability to the electrochemical oxidation of nitric oxide (NO). We also successfully applied the PARS-CNF/CFE system to the determination of NO released from rat liver cells. The results were satisfied, which indicated that this electrode may have wide practical applications in the determination of NO.