title: Tunable polymer brush/Au NPs hybrid plasmonic arrays based on host-guest interaction.
abstract: The fabrication of versatile gold nanoparticle (Au NP) arrays with tunable optical properties by a novel host-guest interaction are presented. The gold nanoparticles were incorporated into polymer brushes by host-guest interaction between β-cyclodextrin (β-CD) ligand of gold nanoparticles and dimethylamino group of poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA). The gold nanoparticle arrays were prepared through the template of PDMAEMA brush patterns which were fabricated combining colloidal lithography and surface-initiated atom-transfer radical polymerization (SI-ATRP). The structure parameters of gold nanoparticle patterns mediated by polymer brushes such as height, diameters, periods and distances, could be easily tuned by tailoring the etching time or size of colloidal spheres in the process of colloidal lithography. The change of optical properties induced by different gold nanoparticle structures was demonstrated. The direct utilization of PDMAEMA brushes as guest avoids a series of complicated modification process and the PDMAEMA brushes can be grafted on various substrates, which broaden its applications. The prepared gold naoparticle arrays are promising in applications of nanosensors, memory storage and surface enhanced spectroscopy.
authors.affiliation: State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University , Changchun 130012, People's Republic of China.
authors.forename: Liping
authors.initials: L
authors.lastname: Fang
authors.forename: Yunfeng
authors.initials: Y
authors.lastname: Li
authors.forename: Zhaolai
authors.initials: Z
authors.lastname: Chen
authors.forename: Wendong
authors.initials: W
authors.lastname: Liu
authors.forename: Junhu
authors.initials: J
authors.lastname: Zhang
authors.forename: Siyuan
authors.initials: S
authors.lastname: Xiang
authors.forename: Huaizhong
authors.initials: H
authors.lastname: Shen
authors.forename: Zibo
authors.initials: Z
authors.lastname: Li
authors.forename: Bai
authors.initials: B
authors.lastname: Yang
keywords: colloid lithography; gold nanoparticle arrays; host−guest interaction; hybrid; polymer brush; tunable optical properties