Abstract
A new modulated structure consisting of periodic (112̄0) stacking faults (SFs) in the α-Fe2O3 nanowires (NWs) formed by the thermal oxidation of Fe foils is reported, using a combination of high-resolution transmission electron microscopy (HRTEM) observations and HRTEM image simulations. The periodicity of the modulated structure is 1.53 nm, which is ten times (33̄00) interplanar spacing and can be described by a shift of every ten (33̄00) planes with 1/2 the interplanar spacing of the (112̄0) plane. An atomic model for the Fe2O3 structure is proposed to simulate the modulated structure. HRTEM simulation results confirm that the modulated structure in α-Fe2O3 NWs is caused by SFs.
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