Cited by 10Optical Coatings and GratingsPhotonic Crystals and ApplicationsTiO2 Photocatalysis and Solar Cells

Photonic Response and Temperature Evolution of SiO2/TiO2 Multilayers

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Christidis, George, Fabrichnaya, Olga B., Koepfli, Stefan M., Poloni, Erik, Winiger, Joel, Fedoryshyn, Yuriy M., Gusarov, Andrey V., Ilatovskaia, Mariia +4 more·2021·Journal of Materials Science

Abstract

Abstract The microstructural and optical reflectivity response of photonic SiO2/TiO2 nanomultilayers have been investigated as a function of temperature and up to the material system’s melting point. The nanomultilayers exhibit high, broadband reflectivities up to 1350 °C with values that exceed 75% for a 1 μm broad wavelength range (600–1600 nm). The optimized nanometer sized, dielectric multilayers undergo phase transformations from anatase TiO2 and amorphous SiO2 to the thermodynamically stable phases, rutile and cristobalite, respectively, that alter their structural morphology from the initial multilayers to that of a scatterer. Nonetheless, they retain their photonic characteristics, when characterized on top of selected substrate foils. The thermal behavior of the nanometer sized multilayers has been investigated by differential thermal analysis (DTA) and compared to that of commercially available, mm-sized, annealed powders. The same melting reactions were observed, but the temperatures were lower for the nm-sized samples. The samples were characterized using X-ray powder diffraction before DTA and after annealing at temperatures of 1350 and 1700 °C. The microstructural evolution and phase compositions were investigated by scanning electron microscopy and energy-dispersive X-ray spectroscopy measurements. The limited mutual solubility of one material to another, in combination with the preservation of their optical reflectivity response even after annealing, makes them an interesting material system for high-temperature, photonic coatings, such as photovoltaics, aerospace re-entry and gas turbines, where ultra-high temperatures and intense thermal radiation are present.

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  • Christidis et al. prepared SiO2/TiO2 nanomultilayers to photonically enhance a thermal protection system against thermal radiation encountered by a spacecraft during space missions; films were prepared through e-beam evaporation on 4'' silicon substrates; the photonic structure consists of 18 thin films of TiO2/SiO2 designed to provide high reflectivity spanning 700-1600 nm.

    “However, Christidis and his colleagues [245] prepared SiO2/TiO2 nanomultilayers to photonically enhance a thermal protection system (TPS) against the thermal radiation encountered by a spacecraft during space missions. The oxide thin films were prepared through e-beam evaporation on 4 ′′ silicon substrates. The photonic structure consists of 18 thin films of TiO2/SiO2 and was designed to provide a”

    From Metal Oxide Thin Films for Advanced Photonic Applications (2026) · cites this paper as [245]

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  1. [47]Lutterotti L, Matthies S, Wenk H MAUD (Material Analysis Using Diffraction): a user friendly Java program for Rietveld Texture Analysis and more. In: Proceeding of the Twelfth International Conference on Textures of Materials (ICOTOM-12), 1999. 1599

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Authors
Christidis, G., Fabrichnaya, O. B., Koepfli, S. M., Poloni, E., Winiger, J., Fedoryshyn, Y. M., Gusarov, A. V., Ilatovskaia, M., Saenko, I., Savinykh, G., Shklover, V., & Leuthold, J.
Affiliations
ETH Zurich (CH)
Corresponding author
Christidis, George
Venue
Journal of Materials Science
Published
2021-10-07
Volume
56
Issue
33
Pages
18440-18452
ISSN
  • 0022-2461 (ISSN-L)
  • 1573-4803
OpenAlex
W3202585398
Cited by
8
References
52
Citations by year
2026: 3 · 2024: 4 · 2023: 1
FWCI
0.36
Type
journal article
Language
en
Open access
Locations
  • Journal of Materials Science (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, other-oa)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Repository for Publications and Research Data (ETH Zurich) (submittedVersion, cc-by)
  • ETH Zürich Research Collection (cc-by)
Funders
  • Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (200021_160184)
  • ETH Zurich
Topics
  • Physical Sciences › Materials Science › Surfaces, Coatings and Films › Optical Coatings and Gratings
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Photonic Crystals and Applications
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › TiO2 Photocatalysis and Solar Cells
Keywords
TiO2/SiO2 multilayers, optical reflectivity, phase transformation, anatase-rutile phase transformation, cristobalite, annealing, microstructure evolution, photovoltaics, gas turbines

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