Figure 1From: A novel gas ionization sensor using Pd nanoparticle-capped ZnO (a) Schematic diagram of the ZnO nanorod-based gas sensor device. (b) SEM image of ZnO nanorods. TEM images of the nanorods: (c) Individual bare ZnO nanorod and (d) Pd/ZnO nanorod with Pd capping by 120 s sputtering, respectively.Back to article page