Development of Pt/Au/PPy-COOH multisegmental nanowires modified label-free impedimetric immunosensor to determine...

In this study, a label-free nanowire-based impedimetric immunosensor was developed for the purpose of determining cancer biomarkers mucin 1 (MUC1). Nanowires were selected for sensor modification due to their high catalytic properties and high enzyme loading capacity. The synthesis, characterization, and application of Pt/Au/PPy-COOH nanowires to modify SPE electrodes were conducted. The nanowire-based immunosensors developed as a result of this research demonstrated a broad linear working range for MUC1 (20-3000 fg/mL), a low LOD value (0.244 fg/mL), and a low LOQ value (0.815 fg/mL). The nanowire-based immunosensor exhibited several notable characteristics. Firstly, it demonstrated excellent reproducibility, selectivity, and long-term stability. Furthermore, it demonstrated notable regenerative capabilities. It is noteworthy that the sensor exhibited the capability to detect MUC1 in commercial human serum samples, even in the presence of interfering agents. The affordability, simplicity, and expeditious analysis of nanowire-based immunosensors render them more appealing than alternative commercial kits. Consequently, these sensors hold considerable promise for clinical applications.