Synthesis of multiple networked NiO nanostructures for enhanced gas sensing performance

Abstract Multiply networked NiO nanostructures were synthesized via a simple hydrothermal process, also, discontinuous net-like NiO structures were prepared as a comparison. The morphologies of two samples were analyzed by SEM and TEM observation. Moreover, the gas sensing results indicated that the multiple networked NiO architectures assembled by nanowires which possess continuous structure exhibit an enhanced gas-sensing performance compared to the other one, which is likely attributed to efficient transmission of carrier and abundant open diffusion channels provided by this novel structure.