Self-assembled Monolayers Preparation and Characterization of BiFeO3 Thin Films

Using OTS as the template, Bi(NO3)3 and Fe(NO3)3 as the raw material and citric acid as the complexing agent, BiFeO3 crystalline film was prepared on the glass substrate by the selfassembled monolayer technique. Effects of calcination and deposition temperatures on the BiFeO3 film were explored. The physical phase composition, the microstructure and surface morphology of BiFeO3 film were characterized by the testing methods, such as XRD, SEM and AFM. The energy detecting spectrum (EDS) provided the supporting evidence for the chemical composition of BiFeO3 film. The results show that the pure BiFeO3 crystalline film is prepared by the self-assembled monolayer technique after calcined at 600℃. In the deposition temperature range from 70℃ to 80℃, the BiFeO3 film has better crystallinity with the homogeneous and dense surface.