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Updated: Jun 3, 2026
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Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System
Published on: July 18, 2015
UV-curable SiO2-TiO2 films for the realization of diffractive optical elements.
Samuele Gardin1, Gioia Della Giustina, Giovanna Brusatin
1Department of Chemical Science, University of Padova, Via Marzolo 1, 35131 Padova, Italy.
Journal of Nanoscience and Nanotechnology
|March 31, 2011
Summary
Hybrid silicon dioxide-titanium dioxide (SiO2-TiO2) films exhibit photocatalytic activity due to titania clusters. This property enables the fabrication of surface-relief gratings using a sol-gel process.
Area of Science:
- Materials Science
- Nanotechnology
- Photocatalysis
Background:
- Hybrid SiO2-TiO2 films are synthesized via sol-gel methods.
- Titania clusters formed during synthesis impart photocatalytic properties.
- Photocatalysis offers potential for surface modification and patterning.
Purpose of the Study:
- To fabricate surface-relief gratings using the photocatalytic activity of hybrid SiO2-TiO2 films.
- To investigate the relationship between titania cluster formation and grating fabrication.
- To characterize the structural properties of the fabricated gratings.
Main Methods:
- Sol-gel synthesis using tetraisopropoxy titanate and 3-glycidoxipropyltrimethoxysilane.
- Utilizing the photocatalytic activity of titania clusters for surface patterning.
- Characterization using Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM), profilometry, and Transmission Electron Microscopy (TEM).
Main Results:
- Successful fabrication of surface-relief gratings was achieved.
- The presence of titania clusters was confirmed by TEM.
- SEM, AFM, and profilometry provided detailed structural characterization of the gratings.
Conclusions:
- The photocatalytic activity of titania clusters in hybrid SiO2-TiO2 films can be effectively exploited for fabricating surface-relief gratings.
- The sol-gel process provides a viable route for creating these functional nanostructured materials.
- The developed method offers a novel approach for micro/nanopatterning applications.
