Effect of substrate deformation on functional properties of atomic-layer-deposited TiO2 coatings on stainless steel |
| |
Authors: | Ladislav Straka Hiroshi Kawakami Jyrki Romu Riitta Mahlberg Hannu Hänninen |
| |
Affiliation: | a Laboratory of Engineering Materials, Helsinki University of Technology, P. O. Box 4200, FI-02015 TKK, Finland b Department of Mechanical Engineering, Osaka City University, 3-3-138, Sugimoto, Sumiyoshi, Osaka 558-8585, Japan c VTT Technical Research Centre of Finland, Advanced Materials, P. O. Box 1000, FI-02044 VTT, Finland d Laboratory of Inorganic Chemistry, University of Helsinki, P. O. Box 55, FI-00014, Finland |
| |
Abstract: | Changes in the functional properties of 50 and 100 nm thick anatase-type and of 100 and 150 nm thick rutile-type atomic-layer-deposited TiO2 coatings with increasing tensile deformation of AISI 304 stainless steel substrate up to 40% strain were studied. All as-received coatings exhibited good photoelectrochemical and photocatalytic activity as well as photohydrophilicity, but the photocatalytic activity of the rutile-type coatings was only one third of that of the anatase-type coatings. The deformation induced changes in the functional properties depended strongly on the type and thickness of the coating. For the 50 nm anatase-type coating, all the monitored functional properties were severely reduced when the applied strain was 1.4% and higher. Rest of the coatings showed also considerable, but more gradual, decrease of the photoelectrochemical and photocatalytic activity with increasing strain. Least affected was the photohydrophilicity which remained approximately constant until 30% applied strain for the 100 nm coatings, and showed some variation for the 150 nm coating. The possible reasons for the observed behavior are discussed. |
| |
Keywords: | Titanium dioxide Coatings Films Atomic layer deposition Photocatalysis Hydrophilicity Stainless steel |
本文献已被 ScienceDirect 等数据库收录! |
|