Development of High-Performance Ethanol Gas Sensors Based on La(2)O(3) Nanoparticles-Embedded Porous SnO(2) Nanofibers.

Porous pure SnO(2) nanofibers (NFs) and La(2)O(3) nanoparticles (NPs)-embedded porous SnO(2) NFs were successfully synthesized via electrospinning followed by calcination. These materials were systematically evaluated as gas-sensing elements in metal-oxide-semiconductor (MOS) sensors. The La(2)O(3) NPs embedded in porous SnO(2) NFs demonstrated superior gas-sensing performance compared to pure SnO(2) NFs. Specifically, the incorporation of La(2)O(3) resulted in a 12-fold enhancement in gas-sensing response towards ethanol, significantly improving both sensitivity and selectivity by tuning the carrier concentration and modifying oxygen deficiencies and chemisorbed oxygen levels. Thus, La(2)O(3) NPs embedded in SnO(2) NFs present a promising strategy for the development of high-performance ethanol gas sensors.