Micro-nano hierarchical porous titania modified with ZnO nanorods for biomedical applications

A porous titania structure with micro-isolated holes and grooves is prepared by micro-arc oxidation on titanium and ZnO nanorods are subsequently electrodeposited on the walls of the pores to produce a micro-nano hierarchical structure suitable for biomedical applications. The hydrophilic property of the structure depends on both the porous structure of the titania as well as morphology of the ZnO nanorods. By changing the fabrication parameters, the structure of the hierarchical structure can be adjusted in order to fine tune surface hydrophilic properties. The micro-nano hierarchical structure is suitable hard tissue replacement implants and other medical applications such as photodynamic therapy (PDT). © 2013 Elsevier B.V.