title: Magnetic nanoparticle assembly arrays prepared by hierarchical self-assembly on a patterned surface.
abstract: Inverted pyramid hole arrays were fabricated by photolithography and used as templates to direct the growth of colloidal nanoparticle assemblies. Cobalt ferrite nanoparticles deposit in the holes to yield high quality pyramid magnetic nanoparticle assembly arrays by carefully controlling the evaporation of the carrier fluid. Magnetic measurements indicate that the pyramid magnetic nanoparticle assembly arrays preferentially magnetize perpendicular to the substrate.
authors.affiliation: State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China. halong@uestc.edu.cn hwzhang@uestc.edu.cn.
authors.forename: Tianlong
authors.initials: T
authors.lastname: Wen
authors.forename: Dainan
authors.initials: D
authors.lastname: Zhang
authors.forename: Qiye
authors.initials: Q
authors.lastname: Wen
authors.forename: Huaiwu
authors.initials: H
authors.lastname: Zhang
authors.forename: Yulong
authors.initials: Y
authors.lastname: Liao
authors.forename: Qiang
authors.initials: Q
authors.lastname: Li
authors.forename: Qinghui
authors.initials: Q
authors.lastname: Yang
authors.forename: Feiming
authors.initials: F
authors.lastname: Bai
authors.forename: Zhiyong
authors.initials: Z
authors.lastname: Zhong