Processing and microstructure characterization of a novel porous hierarchical TiO_2 structure

摘要

We report on a novel biocompatible hierarchical TiO_2 porous coating on the surface of Ti, processed via anodic oxidation. The coating consists of large (~1-20μm) pores on the microscale and nanotubes (~50 nm diameter) on the nanoscale. This structure is exciting because of its potential application as a bioactive coating for Ti bone implants. Surface characterization of the coating showed nanotubes of relatively uniform diameter. The interface between TiO_2 nanotubes and Ti, studied by transmission electron microscopy, was incoherent. The tubes were also somewhat interconnected.