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Photocatalytic Response of Flash-Lamp-Annealed Titanium Oxide Films Produced by Oblique-Angle Deposition.

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Title: Photocatalytic Response of Flash-Lamp-Annealed Titanium Oxide Films Produced by Oblique-Angle Deposition.
Authors: Gago, Raúl1 (AUTHOR) rgago@icmm.csic.es, Prucnal, Slawomir2 (AUTHOR), Palomares, Francisco Javier1,3 (AUTHOR), Álvarez-Fraga, Leopoldo1,4 (AUTHOR), Castellanos-Aliaga, Ana1,3,4 (AUTHOR), Calatayud, David G.2,3,4 (AUTHOR)
Source: Nanomaterials (2079-4991). May2025, Vol. 15 Issue 9, p662. 15p.
Subjects: Titanium dioxide films, Personal computer performance, DC sputtering, Titanium oxides, Substrates (Materials science)
Abstract: We report the photocatalytic (PC) response of titanium oxide (TiOx) films grown by reactive DC magnetron sputtering under oblique-angle-deposition (OAD) and subjected to post-deposition flash-lamp-annealing (FLA). Under ballistic growth conditions, OAD yields TiOx films with either compact or inclined columnar structure as the deposition incidence angle (α) with respect to the substrate normal varies from zero to grazing. On the one hand, films produced for α ≤ 45° display a compact and opaque structure comprising the formation of nanocrystalline cubic titanium monoxide (c-TiO) phase. On the other hand, films grown at larger α (≥60°) display tilted columns with amorphous structure, yielding highly porous films and an increased transparency for α > 75°. For TiOx films grown at large α, FLA induces phase transformation to nanocrystalline anatase from the amorphous state. In contrast to as-grown samples, FLA samples display PC activity as assessed by bleaching of methyl orange dye. The best PC performance is attained for an intermediate situation (α = 60–75°) between compact and columnar structures. The obtained photoactivity is discussed in terms of the different microstructures obtained by OAD and posterior phase formation upon FLA. [ABSTRACT FROM AUTHOR]
Copyright of Nanomaterials (2079-4991) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Label: Title
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  Data: Photocatalytic Response of Flash-Lamp-Annealed Titanium Oxide Films Produced by Oblique-Angle Deposition.
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  Data: <searchLink fieldCode="JN" term="%22Nanomaterials+%282079-4991%29%22">Nanomaterials (2079-4991)</searchLink>. May2025, Vol. 15 Issue 9, p662. 15p.
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  Data: <searchLink fieldCode="DE" term="%22Titanium+dioxide+films%22">Titanium dioxide films</searchLink><br /><searchLink fieldCode="DE" term="%22Personal+computer+performance%22">Personal computer performance</searchLink><br /><searchLink fieldCode="DE" term="%22DC+sputtering%22">DC sputtering</searchLink><br /><searchLink fieldCode="DE" term="%22Titanium+oxides%22">Titanium oxides</searchLink><br /><searchLink fieldCode="DE" term="%22Substrates+%28Materials+science%29%22">Substrates (Materials science)</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: We report the photocatalytic (PC) response of titanium oxide (TiOx) films grown by reactive DC magnetron sputtering under oblique-angle-deposition (OAD) and subjected to post-deposition flash-lamp-annealing (FLA). Under ballistic growth conditions, OAD yields TiOx films with either compact or inclined columnar structure as the deposition incidence angle (α) with respect to the substrate normal varies from zero to grazing. On the one hand, films produced for α ≤ 45° display a compact and opaque structure comprising the formation of nanocrystalline cubic titanium monoxide (c-TiO) phase. On the other hand, films grown at larger α (≥60°) display tilted columns with amorphous structure, yielding highly porous films and an increased transparency for α > 75°. For TiOx films grown at large α, FLA induces phase transformation to nanocrystalline anatase from the amorphous state. In contrast to as-grown samples, FLA samples display PC activity as assessed by bleaching of methyl orange dye. The best PC performance is attained for an intermediate situation (α = 60–75°) between compact and columnar structures. The obtained photoactivity is discussed in terms of the different microstructures obtained by OAD and posterior phase formation upon FLA. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Nanomaterials (2079-4991) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.3390/nano15090662
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        Text: English
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      – SubjectFull: Titanium dioxide films
        Type: general
      – SubjectFull: Personal computer performance
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      – SubjectFull: DC sputtering
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      – SubjectFull: Titanium oxides
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      – SubjectFull: Substrates (Materials science)
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      – TitleFull: Photocatalytic Response of Flash-Lamp-Annealed Titanium Oxide Films Produced by Oblique-Angle Deposition.
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              M: 05
              Text: May2025
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