title: Periodic ZnO nanorod arrays defined by polystyrene microsphere self-assembled monolayers.
abstract: We demonstrate a low-cost and effective method to fabricate hexagonally patterned, vertically aligned ZnO nanorod arrays. Selective wet-etching is used to develop the catalyzing gold particle hexagonal pattern with the aid of a polystyrene microsphere self-assembled monolayer. The gold particles have tunable sizes independent of the polystyrene microsphere's diameter and are inherently round in shape. Each ZnO rod is grown individually from a catalyzing site via catalyst-initiated epitaxy, and the original hexagonal periodicity is well-preserved. The rods have flat ends, and the diameters of the rods can be controlled well by the amount of source materials. This method provides a promising way to create ZnO one-dimensional nanostructures for applications as two-dimensional photonic crystal, sensor arrays, nanolaser arrays, and optoelectronic devices.
authors.affiliation: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Graduate School of the Chinese Academy of Sciences, Beijing 100080, P R China.
authors.forename: D F
authors.initials: DF
authors.lastname: Liu
authors.forename: Y J
authors.initials: YJ
authors.lastname: Xiang
authors.forename: X C
authors.initials: XC
authors.lastname: Wu
authors.forename: Z X
authors.initials: ZX
authors.lastname: Zhang
authors.forename: L F
authors.initials: LF
authors.lastname: Liu
authors.forename: L
authors.initials: L
authors.lastname: Song
authors.forename: X W
authors.initials: XW
authors.lastname: Zhao
authors.forename: S D
authors.initials: SD
authors.lastname: Luo
authors.forename: W J
authors.initials: WJ
authors.lastname: Ma
authors.forename: J
authors.initials: J
authors.lastname: Shen
authors.forename: W Y
authors.initials: WY
authors.lastname: Zhou
authors.forename: G
authors.initials: G
authors.lastname: Wang
authors.forename: C Y
authors.initials: CY
authors.lastname: Wang
authors.forename: S S
authors.initials: SS
authors.lastname: Xie
mesh_terms: D003460:Crystallization / Q000379:methods*; D008422:Materials Testing; D008863:Microspheres; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000379:methods*; D010316:Particle Size; D011137:Polystyrenes / Q000737:chemistry*; D013499:Surface Properties; D015034:Zinc Oxide / Q000737:chemistry*
chemical_list: D011137:Polystyrenes; D015034:Zinc Oxide