Fabrication of Polyindole/Mn۲O۳ Nanofiber-Modified Glassy Carbon Electrode for Enhanced Dopamine Sensing

This study presents a high-performance electrochemical sensor for dopamine (DA) detection, achieved by modifying a glassy carbon electrode (GCE) with polyindole (PIN) nanofibers embedded with Mn۲O۳ nanoparticles. The nanofiber composite was synthesized via electrospinning, ensuring homogeneous dispersion of Mn۲O۳ within the polymer. Electrochemical analyses, including cyclic voltammetry (CV) and differential pulse voltammetry (DPV), revealed that the modified electrode possesses excellent electrocatalytic properties, remarkable stability, and outstanding selectivity toward dopamine. The sensor demonstrated a broad dynamic range and a low limit of detection, confirming the suitability of PIN/Mn۲O۳ nanofibers for sensitive neurotransmitter monitoring.

Keywords:

Polyindole , Mn۲O۳ , Nanofibers , Dopamine , Electrochemical Sensor , Glassy Carbon Electrode