Composite structures on the base of nanotubular anodic oxide coatings on aluminium and titanium and their possible applications

摘要

Anodic oxidation is a commonly used method for surface treatment especially in forming self-organized porous alumina structures. Nanoporous alumina (NPA) has become a key template material for fabrication of nanostructured materials. Similar to anodic alumina self-ordered titania nanotubes can be fabricated by anodization of titanium in water and waterless solutions of acids and the salts containing fluoride ions. Nanotubular anodic titania is a very promising material for applications in many scientific and technological areas. It seems tempting to expand nanostructured aluminas and titanias functional properties by doping of metal ions. In the present paper we summarize our data on (i) nanostructured anodic titania and alumina films concerning their structure and mechanism of growth; (ii) development of the composite materials by modification of oxide matrix with Ag. In this case Ag-nanoparticles are immobilized in oxide pores or tubes. It prevents from their aggregation and protects from external influences. Also the paper deals with the investigation of antibacterial activity of developed nanocomposite structures.