Fabrication of Barium Titanate Inverse Opals by Sol-Gel Electrophoretic Deposition Process

Barium titanate (BTO) inverse opal photonic crystals were fabricated by a process of self-assembly of polystyrene opal template in combination with electrophoretic deposition (EPD) of nanoparticles from BTO suspension. In this process, stable monodispersed suspension of BTO nanoparticles was prepare...

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Bibliographic Details
Published in:Key engineering materials 2010-01, Vol.434-435, p.247-252
Main Authors: Wang, Jin Qing, Li, Bo, Fujiwara, Rei, Fu, Ming, Zhou, Ji, Kuwabara, Makoto
Format: Article
Language:English
Subjects:
Band spectra
Barium titanates
Devices
Dispersing
Electrophoretic deposition
Face centered cubic lattice
Interstices
Inverse
Microspheres
Nanoparticles
Photonic crystals
Photonics
Polystyrene resins
Reflection
Roasting
Scanning electron microscopy
Self assembly
Sol gel process
Solvents
Spectra
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Summary:Barium titanate (BTO) inverse opal photonic crystals were fabricated by a process of self-assembly of polystyrene opal template in combination with electrophoretic deposition (EPD) of nanoparticles from BTO suspension. In this process, stable monodispersed suspension of BTO nanoparticles was prepared by dispersing BTO gel into a mixed solvent of 2-methoxyethanol and acethylacetone. Then the BTO nanoparticles were infilled into the interstices of the opal template formed by monodisperse polystyrene microspheres by electrophoretic deposition, and then polystyrene template was removed by calcining the specimen at a final temperature of 500oC. SEM images show that the inverse opals possess face-centered cubic (fcc) structure with center to center distant of the air spheres 310 nm. A photonic bandgap in the visible range is observed from reflection spectra of the sample. Such BTO inverse opals as photonic crystals should be useful in device applications.
ISSN:1013-9826
1662-9795
1662-9795
DOI:10.4028/www.scientific.net/KEM.434-435.247