Liquid phase deposition of BiFeO3 thin film on self-assembly monolayers
BiFeO3 (BFO) thin films were successfully deposited on self-assembled monolayers (SAMs) by the liquid phase deposition method. The measurement of contact angle and atomic force microscopy (AFM) showed that after immersion in an octadecyl trichlorosilane (OTS) solution for 30 min, the surface of the substrate was covered with a smooth, hydrophobic layer. After UV irradiation for 30 min, the smooth hydrophobic layer changed into a serrated hydrophilic layer. This indicated that the OTS-SAMs played an active role as chemical templates in controlling nucleation and growth of the BFO thin film. The phase and the surface topography of the BFO film were investigated respectively by X-ray diffraction, Field emission scanning electron microscopy (FE-SEM) and AFM. The results showed that the optimum annealing temperature and deposition temperature for preparing the BFO thin film were 600 and 70 °C respectively. The films were annealed at 600 °C for 2 h. As-prepared thin films were smooth, uniform, and dense with the height varying between 20 and 100 nm. Moreover, patterned BFO nanoarrays were prepared.
KeywordsAtomic Force Microscopy Contact Angle BiFeO3 BiFeO3 Thin Film Octadecyl Trichlorosilane
This work was supported by the Project of the National Natural Science Foundation of China (Grant No. 51172135); the Young Scientists Fund of the National Natural Science Foundation of China (Grant No. 51002092); Research and special projects of the Education Department of Shaanxi Province (Grant No. 12JK0445); the Graduate Innovation Found of Shaanxi University of Science and Technology (SUST-A04).
- 1.S.K. Singh, Y.K. Kim, H. Funakubo et al., Appl. Phys. Lett. 88, 16290–16294 (2006)Google Scholar