title: Surface-guided self-assembly of silver nanoparticles on edges of heterogeneous surfaces.
abstract: A general method for the generation of two-dimensional (2D) ordered silver nanoparticles (av 45 nm) ring array has been demonstrated via controllable self-assembly. The selective self-assembly is conducted on the edges of a gold coated polyelectrolyte film. This film is fabricated using the monolayer polystyrene (PS) spheres (av 600 nm) on a substrate as template, followed by depositing a positively charged polyelectrolyte and gold colloids (av 17 nm) via the layer-by-layer (LbL) self-assembly technique, and finally by eliminating the PS monolayer. This gold coated polyelectrolyte film has a regular pattern of sharp edges, and those edges are composed of abundant polyelectrolyte. This heterogeneous surface is easily prepared and universal for site-selective absorption of nanoparticles (silver nanoparticles in this paper, av 45 nm). This surface-guided self-assembly is powerful for fabricating micro/nanostructures on the edges of prepatterns. Scanning electron microscopy (SEM) and atomic force microscopy (AFM) were used to characterize the products.
authors.affiliation: State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun, PR China.
authors.forename: Weidong
authors.initials: W
authors.lastname: Ruan
authors.forename: Chunxu
authors.initials: C
authors.lastname: Wang
authors.forename: Nan
authors.initials: N
authors.lastname: Ji
authors.forename: Zhicheng
authors.initials: Z
authors.lastname: Lu
authors.forename: Tieli
authors.initials: T
authors.lastname: Zhou
authors.forename: Bing
authors.initials: B
authors.lastname: Zhao
authors.forename: John R
authors.initials: JR
authors.lastname: Lombardi
mesh_terms: D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D018625:Microscopy, Atomic Force; D008855:Microscopy, Electron, Scanning; D011137:Polystyrenes / Q000737:chemistry; D012834:Silver / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D011137:Polystyrenes; D012834:Silver