title: Gold binary-structured arrays based on monolayer colloidal crystals and their optical properties.
abstract: A simple and flexible route is presented to fabricate a gold binary-structured ordered array by one step based on non-shadow deposition on a plasma etching-induced dualistic monolayer colloidal crystal. Such a Au binary-structure array is built of hexagonally arranged nanoshells and nanorings which stand between two adjacent nanoshells. Six gold nanorings surround each nanoshell. The obtained arrays exhibit both the controllable surface-plasmon-resonance (SPR) properties of Au nanoshells and the strong electromagnetic-field-enhancement effects of Au nanorings, with the high structural stability of ordered arrays, and show promising potential as the substrate of surface-enhanced Raman scattering (SERS)-based devices. The method could also be suitable for fabrication of other material binary-structured arrays. This study is important in designing and fabricating basal materials for the next generation of multifunctional nanostructured devices.
authors.affiliation: Key Lab of Materials Physics, Anhui Key Lab of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, P.R. China.
authors.forename: Guangqiang
authors.initials: G
authors.lastname: Liu
authors.forename: Xinhua
authors.initials: X
authors.lastname: Li
authors.forename: Wenbo
authors.initials: W
authors.lastname: Wang
authors.forename: Fei
authors.initials: F
authors.lastname: Zhou
authors.forename: Guotao
authors.initials: G
authors.lastname: Duan
authors.forename: Yue
authors.initials: Y
authors.lastname: Li
authors.forename: Zongke
authors.initials: Z
authors.lastname: Xu
authors.forename: Weiping
authors.initials: W
authors.lastname: Cai
keywords: SERS effects; electromagnetic field enhancements; gold binary-structured arrays; nanorings; nanoshells