Published Jun 10, 2010



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Octavio Alejandro Castañeda-Uribe

Juan Carlos Salcedo-Reyes

Henry Alberto Méndez-Pinzón

Aura Marina Pedroza-Rodríguez

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Abstract

Objective: Fabrication and optical characterization of close-packed 225 nm SiO2 -based colloidal crystals. Materials and methods: The vertical convective self-assembly method is used to grow high-quality 225 nm close-packed SiO2-based colloidal crystals. An annealing process (550°C) is made in order to improve the mechanical stability of the sample. Optical characterization is done by angle-resolved transmission spectroscopy (A-RTS) and structural characterization by Scanning Electron Microscopy (SEM). Results: Both, A-RTS and SEM, show that with the vertical convective self-assembly method, with the appropriate parameters of temperature of evaporation (60°C), volume fraction of the colloidal suspension (0.2% w/w) and acidity (pH=6), highly ordered close packed face centered cubic (fcc) SiO2 based colloidal crystals are obtained. Conclusions: The growth of high-quality (long range order and defect-free) face centered cubic opal-based photonic crystals is reported.

Key words: Photonic crystals, colloidal crystals, artificial opals, vertical convective deposition method, Bragg diffraction



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References
How to Cite
Castañeda-Uribe, O. A., Salcedo-Reyes, J. C., Méndez-Pinzón, H. A., & Pedroza-Rodríguez, A. M. (2010). Fabrication and optical characterization of a high-quality fcc-opal-based photonic crystal grown by the vertical convective self-assembly method. Universitas Scientiarum, 15(2), 150–158. https://doi.org/10.11144/javeriana.SC15-2.faoc
Section
Física / Physics / Física

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