Details

Autor(en) / Beteiligte

• Mohammadpour, Arash
• Shankar, Karthik

Titel

Magnetic field-assisted electroless anodization: TiO sub(2) nanotube growth on discontinuous, patterned Ti films

Ist Teil von

• Journal of materials chemistry. A, Materials for energy and sustainability, 2014-08, Vol.2 (34), p.13810-13816

Erscheinungsjahr

2014

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• We present a magnetic field-assisted oxidation and etching process that transforms Ti thin films on arbitrary substrates into self-organized TiO sub(2) nanotube arrays without the direct application of an anodization voltage between the cathode and the Ti film/substrate. In effect, the Ti film/substrate electrode is at a floating potential determined by the ionic Hall voltage. The development of such a magnetic field-assisted electroless anodization process, frees the anodization technique of forming nanostructured semiconductors and metal oxides from the constraints of substrate conductivity and film continuity imposed by the traditional anodization process, and allows the creation of uniform anodic nanostructures on pre-existing high-aspect ratio patterns as well as on substrates containing both conductive and non-conductive areas. Using magnetic field assisted electroless anodization, we demonstrate the formation of microscale patterns of high quality TiO sub(2) nanotubes from discontinuous Ti films deposited on thermal oxide-coated Si substrates and patterned by a lift-off process.