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A version of Stöber synthesis enabling the facile prediction of silica nanospheres size for the fabrication of opal photonic crystals |
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| Authors: | Diego Adolfo Santamaría Razo Luca Pallavidino Edoardo Garrone Francesco Geobaldo Emiliano Descrovi Angelica Chiodoni Fabrizio Giorgis |
| Affiliation: | (1) Materials Science and Chemical Engineering Department, Politecnico of Torino, C.so Duca degli Abruzzi 24, 10129 Torino, Italy;(2) Materials and Microsystems Laboratory χLab-Physics Department, Politecnico of Torino, C.so Duca degli Abruzzi 24, 10129 Torino, Italy |
| Abstract: | A sol-gel synthesis procedure based on the method proposed by Stöber et al. (J Colloid Interface Sci 26:302–315, 1968) has been adopted for the one-step preparation of mono-dispersed silica nanospheres. An excellent control of the particle diameter over a wide range is obtained by varying the amount of silicon alkoxide only, while the concentration of all other components is kept fixed: this allows the fabrication of artificial opals with a finely tuned and precisely predictable lattice parameter. |
| Keywords: | 3-D Photonic crystals Synthetic opals Bragg reflection peak Monodispersed silica nanospheres Self assembly Colloids |
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