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The bismuth ferrite (BiFeO 3 , BFO)with a face-centered cubic inverse opal structure was prepared by the sol–gel method, involving the infiltration of liquid precursors into polystyrene (PS) colloidal crystals and the post-annealing for the remove of PS and the crystallization of BFO. This inverse opals exhibit a continuous 3D photonic crystal structure consisting of single phase...
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