Figure 5From: Fabrication and NO2 gas sensing performance of TeO2-core/CuO-shell heterostructure nanorod sensorsSchematic energy diagram showing three different potential barriers. Schematic energy diagram showing three different potential barriers formed in the multiple networked TeO2/CuO core-shell nanorod sensor: (a) one at a TeO2/CuO core-shell interface and another at a polycrystalline CuO shell grain boundary and (b) the third at a nanorod-nanorod contact.Back to article page