Excellent ethanol sensing properties based on Er2O3-Fe2O3 nanotubes*
Liu Chang-Baia), He Yingb), Wang Sheng-Leia)
       
The N2 adsorption–desorption isotherm and BJH pore size distribution curves (insert) of pure α -Fe2O3 nanotubes (a) and Er2O3-Fe2O3 nanotubes (b) at standard temperature and pressure.