Coaxial electrospinning Fe2O3@Co3O4 double-shelled nanotubes for enhanced ethanol sensing performance in a wide humidity range

Gas sensors play a crucial part in air monitoring and exclusive detection of exhaled biomarkers. Co3O4 is regarded as a promising gas sensing material in lower temperatures (<200 °C) due to its affinity with oxygen and multivalent characteristics. However, its poor intrinsic conductivity leads to a lower response, hindering further practical applications. The introduction of Fe2O3 is desired to enhance the conductivity and regulate...