Fabrication and hydrogen sensing properties of Titania nanotubes

Abstract

TiO ₂ nanotubes have wide applications in gas sensing applications such as oxygen sensors and hydrogen sensors. In this work, crystallized TiO ₂ nanotubes self-assembled on Ti substrate were fabricated through anodization and heat-treatment. The anodization parameters for fabricating optimized nanostructures were investigated and hydrogen sensing properties of the nanotubes were tested. It was found that the anodization temperature and voltage had a great impact on the formation of uniform nanotubes or nanostructures. And the nanotubes assembled on Cu-coated PCB demonstrated a good hydrogen sensing properties at room temperature.