title: Misorientation control and functionality design of nanopillars in self-assembled perovskite-spinel heteroepitaxial nanostructures.
abstract: In this study, advanced control of crystallographic orientations and magnetic properties of self-assembled nanostructures via rational selections of substrates is demonstrated. We show that in the perovskite-spinel BiFeO(3)-CoFe(2)O(4) model system the crystal orientation of self-assembled CoFe(2)O(4) nanopillars can be tuned among (001), (011), and (111), while that of the BiFeO(3) matrix is fixed in (001). Moreover, the resultant CoFe(2)O(4) nanopillars appear in various shapes: pyramid, roof, and triangular platform, respectively. The tunable nanostructures through this approach enable the control of material functionality such as the magnetic anisotropy of CoFe(2)O(4). This study opens a new pathway for the engineering of self-assembled heteroepitaxial nanostructures.
authors.affiliation: Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan.
authors.forename: Sheng-Chieh
authors.initials: SC
authors.lastname: Liao
authors.forename: Pei-Yu
authors.initials: PY
authors.lastname: Tsai
authors.forename: Chen-Wei
authors.initials: CW
authors.lastname: Liang
authors.forename: Heng-Jui
authors.initials: HJ
authors.lastname: Liu
authors.forename: Jan-Chi
authors.initials: JC
authors.lastname: Yang
authors.forename: Su-Jien
authors.initials: SJ
authors.lastname: Lin
authors.forename: Chih-Huang
authors.initials: CH
authors.lastname: Lai
authors.forename: Ying-Hao
authors.initials: YH
authors.lastname: Chu
mesh_terms: D017610:Calcium Compounds / Q000737:chemistry*; D003460:Crystallization / Q000379:methods*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D010087:Oxides / Q000737:chemistry*; D010316:Particle Size; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*
chemical_list: D017610:Calcium Compounds; D046911:Macromolecular Substances; D010087:Oxides; C059910:perovskite; D014025:Titanium