Synthesis of SnO₂–ZnO core–shell nanofibers via a novel two-step process and their gas sensing properties

SnO₂–ZnO core–shell nanofibers were synthesized via a novel two-step process. First, SnO₂ nanofibers were synthesized by electrospinning. In sequence, ZnO shell layers were deposited using atomic layer deposition on the electrospinning synthesized SnO₂ nanofibers. To demonstrate the practical applications of the synthesized core–shell nanofibers, we investigated their sensing properties to O₂ and NO₂. The high sensitivity and dynamic repeatability observed in these sensors reveal that the core–shell nanofibers are promising as sensitive and reliable chemical sensors.