TiO2 nanotubes grown on Ti substrates with different microstructure

[Display omitted] •TiO2 nanotube layers were grown on four different Ti substrates by anodization.•Ti substrates with completely different microstructures were used.•The grain size of the substrates ranged from nanocrystalline to single-crystalline.•Differences between the nanotubes grown on these s...

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Bibliographic Details
Published inMaterials research bulletin Vol. 103; pp. 197 - 204
Main Authors Sopha, Hanna, Tesar, Karel, Knotek, Petr, Jäger, Ales, Hromadko, Ludek, Macak, Jan M.
Format Journal Article
LanguageEnglish
Published United States Elsevier Ltd 01.07.2018
Subjects
ANNEALING
Anodic oxidation
ANODIZATION
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
CRYSTALLOGRAPHY
DISSOLUTION
ELECTROLYTES
ETHYLENE GLYCOLS
GRAIN ORIENTATION
GRAIN SIZE
IMPURITIES
Microstructure
MONOCRYSTALS
NANOSCIENCE AND NANOTECHNOLOGY
NANOTUBES
OXIDATION
SUBSTRATES
THICKNESS
TITANIUM
Titanium dioxide
TITANIUM OXIDES
Titanium
Anodic oxidation
Microstructure
Titanium dioxide
Nanotubes
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Summary:[Display omitted] •TiO2 nanotube layers were grown on four different Ti substrates by anodization.•Ti substrates with completely different microstructures were used.•The grain size of the substrates ranged from nanocrystalline to single-crystalline.•Differences between the nanotubes grown on these substrates were evaluated.•Similar nanotube dimensions were received on all Ti substrates. Four Ti substrates with various microstructures were investigated for the anodic growth of TiO2 nanotube layers: nanocrystalline and single-crystalline ingots as well as microcrystalline thick Ti sheets and microcrystalline thin Ti foils. All substrates were anodized in a conventional ethylene glycol based electrolyte under identical conditions. The resulting TiO2 nanotube layers were compared in dimensions and the consumption of Ti required for their growth. Unexpectedly, the results showed that on all substrates nanotube layers with a similar thickness and nanotube diameter, as well as a similar degree of ordering and after annealing the same crystallographic orientation of anatase were received, regardless the microstructures. However, the nanotube layers grown on a Ti sheet revealed a slightly higher thickness compared to the other substrates which were assigned to slower field-assisted dissolution rates due to different impurities found in this substrate compared to other ones.
ISSN:0025-5408
1873-4227
DOI:10.1016/j.materresbull.2018.03.036