Excellent ethanol sensing properties based on Er2O3-Fe2O3 nanotubes*
Liu Chang-Baia), He Yingb), Wang Sheng-Leia)
       
TEM images of pure α -Fe2O3 nanotubes ((a) and (c)) and 3 wt% Er2O3-Fe2O3 nanotubes ((b) and (d)).