Effect of substrate deformation on functional properties of atomic-layer-deposited TiO2 coatings on stainless steel

Ladislav Straka (Corresponding Author), Hiroshi Kawakami, Jyrki Romu, Risto Ilola, Riitta Mahlberg, Mikko Heikkilä, Hannu Hänninen

Research output: Contribution to journalArticleScientificpeer-review

9 Citations (Scopus)

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.
Original languageEnglish
Pages (from-to)3797-3805
Number of pages9
JournalThin Solid Films
Volume517
Issue number13
DOIs
Publication statusPublished - 2009
MoE publication typeA1 Journal article-refereed

Fingerprint

Stainless Steel
stainless steels
Stainless steel
coatings
Coatings
Substrates
anatase
Titanium dioxide
rutile
tensile deformation
titanium dioxide

Keywords

  • Titanium dioxide
  • Coatings
  • Films
  • Atomic layer deposition
  • Photocatalysis
  • Hydrophilicity
  • Stainless steel

Cite this

Straka, Ladislav ; Kawakami, Hiroshi ; Romu, Jyrki ; Ilola, Risto ; Mahlberg, Riitta ; Heikkilä, Mikko ; Hänninen, Hannu. / Effect of substrate deformation on functional properties of atomic-layer-deposited TiO2 coatings on stainless steel. In: Thin Solid Films. 2009 ; Vol. 517, No. 13. pp. 3797-3805.
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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",
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Effect of substrate deformation on functional properties of atomic-layer-deposited TiO2 coatings on stainless steel. / Straka, Ladislav (Corresponding Author); Kawakami, Hiroshi; Romu, Jyrki; Ilola, Risto; Mahlberg, Riitta; Heikkilä, Mikko; Hänninen, Hannu.

In: Thin Solid Films, Vol. 517, No. 13, 2009, p. 3797-3805.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Effect of substrate deformation on functional properties of atomic-layer-deposited TiO2 coatings on stainless steel

AU - Straka, Ladislav

AU - Kawakami, Hiroshi

AU - Romu, Jyrki

AU - Ilola, Risto

AU - Mahlberg, Riitta

AU - Heikkilä, Mikko

AU - Hänninen, Hannu

PY - 2009

Y1 - 2009

N2 - 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.

AB - 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.

KW - Titanium dioxide

KW - Coatings

KW - Films

KW - Atomic layer deposition

KW - Photocatalysis

KW - Hydrophilicity

KW - Stainless steel

U2 - 10.1016/j.tsf.2009.01.091

DO - 10.1016/j.tsf.2009.01.091

M3 - Article

VL - 517

SP - 3797

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JO - Thin Solid Films

JF - Thin Solid Films

SN - 0040-6090

IS - 13

ER -