The sol-gel route leads to hematite with a photonic crystal structure (PC- α-Fe 2O 3) being faithfully replicated from a biotemplate, and the desired magnetophotonic crystal Fe 3O 4 (MPC-Fe 3O 4) is obtained by the reduction of the PC- α-Fe 2O 3 under a H 2/Ar atmosphere. A simple synthesis method combining a sol-gel route followed by a reduction step is developed for the fabrication of magnetophotonic crystal (MPC) materials from Morpho butterfly wings.
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