Superhydrophobic surface of TiO2 hierarchical nanostructures fabricated by Ti anodization

• TiO2 hierarchical structure displayed an enhanced hydrophobicity.
• Superhydrophobicity was further enhanced by removing the dense nanowires layer.
• Potential application was explored by floating Ti mesh.

A hierarchical structure of TiO2 with disordered nanowires on top of regular nanotubes was fabricated. With organic monolayers, it showed stronger superhydrophobic properties than regular nanotubes. The surface roughness was further enhanced by removing the dense nanowires layer, resulting in 172° water contact angle. The potential application for aquatic devices was explored by the treated Ti mesh which showed striking floating stability.

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