title: Ordered arrays of ZnO nanorods grown on periodically polarity-inverted surfaces.
abstract: Periodically polarity inverted (PPI) ZnO templates were fabricated using molecular beam epitaxy by employing MgO buffer layers. The polarity of ZnO film was controlled by the transformation of crystal structure from hexagonal to rocksalt due to the thickness of the MgO buffer layers. The polarity of ZnO in the PPI template was confirmed by AFM and PRM measurement. Higher growth rate and lower current value under positive supplied voltage in the region of Zn-polar were measured with comparing to that of O-polar. Holographic lithographic technique was employed for the realization of submicron pattern of periodical inverted polar ZnO over large area. After reaction using a carbothermal reduction, spatially well-separated ZnO nanorods with pitch of submicron were only observed in the Zn-polar regions. The possible reason for the difference of surface characteristics was considered as being due to the configuration of dangling bonds according to polarity.
authors.affiliation: Center for Interdisciplinary Research, Tohoku University, Aramaki, Sendai 980-8578, Japan. shlee7579@gmail.com
authors.forename: Sang Hyun
authors.initials: SH
authors.lastname: Lee
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Minegishi
authors.forename: Jin Sub
authors.initials: JS
authors.lastname: Park
authors.forename: Seung Hwan
authors.initials: SH
authors.lastname: Park
authors.forename: Jun-Seok
authors.initials: JS
authors.lastname: Ha
authors.forename: Hyo-Jong
authors.initials: HJ
authors.lastname: Lee
authors.forename: Hyun-Jae
authors.initials: HJ
authors.lastname: Lee
authors.forename: Sungmo
authors.initials: S
authors.lastname: Ahn
authors.forename: Jaehoon
authors.initials: J
authors.lastname: Kim
authors.forename: Heonsu
authors.initials: H
authors.lastname: Jeon
authors.forename: Takafumi
authors.initials: T
authors.lastname: Yao