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Fabrication of Barium Strontium Titanate Inverse Opals by the Sol–Gel Process
Author(s) -
Li Bo,
Wang Jinqing,
Fu Ming,
Zhou Ji,
Kuwabara Mokoto
Publication year - 2007
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2007.02067.x
Subject(s) - materials science , barium titanate , polystyrene , sol gel , scanning electron microscope , photonic crystal , nanoparticle , ferroelectricity , chemical engineering , titanate , nanotechnology , dielectric , optoelectronics , composite material , ceramic , polymer , engineering
Barium strontium titanate (BST) inverse opal photonic crystals (PCs) were fabricated by a process of self‐assembly of a polystyrene opal template in combination with infiltration of BST nanoparticles into the voids of a template. In this process, stable monodispersed BST nanoparticles were prepared by dispersing a BST gel into a mixed solvent of 2‐methoxyethanol and acetylacetone. Scanning electron microscopy images show that the inverse opals possess a face‐centered cubic lattice with a center‐to‐center distance of the air spheres of 270 nm. The X‐ray diffraction result reveals that a ferroelectric perovskite phase was obtained. A photonic bandgap in the visible range is observed from reflection spectra analysis and compared with the theoretical results.