Hierarchical Templating of a BiFeO3-CoFe2O4 Multiferroic Nanocomposite by a Triblock Terpolymer Film

作者：Choi Hong Kyoon; Aimon Nicolas M; Kim Dong Hun; Sun Xue Yin; Gwyther Jessica; Manners Ian; Ross Caroline A^*

来源：ACS Nano, 2014, 8(9): 9248-9254.

DOI：10.1021/nn503100s

• directed self-assembly
• spinel-perovskite nanocomposite
• triblock terpolymer

A process route to fabricate templated BiFeO3/CoFe2O4 (BFO/CFO) vertical nanocomposites is presented in which the self-assembly of the BFO/CFO is guided using a self-assembled triblock terpolymer. A linear triblock terpolymer was selected instead of a diblock copolymer in order to produce a square-symmetry template, which had a period of 44 nm. The triblock terpolymer pattern was transferred to a (001) Nb:SrTiO3 substrate to produce pits that formed preferential sites for the nucleation of CFO crystals, in contrast to the BFO, which wetted the flat regions of the substrate. The crystallographic orientation and magnetic properties of the templated BFO/CFO were characterized.

• 出版日期2014-9
• 单位哈尔滨工业大学