Al2O3/TiO2 inverse opals from electrosprayed self-assembled templates

The fabrication of high optical quality inverse opals is challenging, requiring large size, three-dimensional ordered layers of high dielectric constant ratio. In this article, alumina/TiO2–air inverse opals with a 98.2% reflectivity peak at 798 nm having an area of 2 cm2 and a thickness of 17 µm ar...

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Bibliographic Details
Published inBeilstein journal of nanotechnology Vol. 9; no. 1; pp. 216 - 223
Main Authors Coll Arnau, Bermejo, Sandra, Hernández, David, Castañer Luís
Format Journal Article Publication
LanguageEnglish
Published Frankfurt am Main Beilstein-Institut zur Föerderung der Chemischen Wissenschaften 19.01.2018
Beilstein-Institut
Subjects
Aluminum oxide
Crystals
Defects
Electrospray
Electrospraying
Enginyeria de la telecomunicació
Fotònica
Full Research Paper
Metamaterials
Nanoparticles
Nanoscience
Nanotechnology
Nanotecnologia
Photonic crystals
Photonics
Scanning electron microscopy
Self-assembly
Telecomunicació òptica
Thickness
Titanium dioxide
Titanium oxides
Àrees temàtiques de la UPC
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Summary:The fabrication of high optical quality inverse opals is challenging, requiring large size, three-dimensional ordered layers of high dielectric constant ratio. In this article, alumina/TiO2–air inverse opals with a 98.2% reflectivity peak at 798 nm having an area of 2 cm2 and a thickness of 17 µm are achieved using a sacrificial self-assembled structure of large thickness, which was produced with minimum fabrication errors by means of an electrospray technique. Using alumina as the first supporting layer enables the deposition of TiO2 at a higher temperature, therefore providing better optical quality.
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content type line 23
ISSN:2190-4286
2190-4286
DOI:10.3762/bjnano.9.23