Marianna Kemell et al 2010 Nanotechnology 21 035301 doi:10.1088/0957-4484/21/3/035301
Marianna Kemell1, Emma Härkönen, Viljami Pore, Mikko Ritala and Markku Leskelä
Show affiliationsNanotubular Ta2O5- and TiO2-based structures were prepared by atomic layer deposition of Ta2O5 and TiO2 thin films, conformally on pore walls of porous alumina membranes. Both self-supporting alumina membranes and Si-supported thin-film membranes were studied as templates. Long Ta2O5 and TiO2 nanotubes were prepared successfully with the self-supporting membranes. The TiO2 nanotubes showed photocatalytic activity in methylene blue degradation under UV illumination. The Ta2O5 and TiO2 nanotubes were further modified by depositing Pt nanoparticles inside them. The Si-supported thin-film membranes were used as templates for the preparation of robust Ta2O5-coated Ni nanorod arrays on a Si substrate using electrodeposition, chemical etching and atomic layer deposition. In addition to photocatalysis, the nanostructures prepared in this work may find applications as other catalysts and as solid-state or electrochemical capacitors.
81.15.Pq Electrodeposition, electroplating
82.45.Yz Nanostructured materials in electrochemistry
82.45.Mp Thin layers, films, monolayers, membranes
68.37.Hk Scanning electron microscopy (SEM) (including EBIC)
Surfaces, interfaces and thin films
Issue 3 (22 January 2010)
Received 10 September 2009, in final form 12 November 2009
Published 7 December 2009
Marianna Kemell et al 2010 Nanotechnology 21 035301
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