Surface-guided self-assembly of silver nanoparticles on edges of heterogeneous surfaces.
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.
Ruan
Weidong
W
State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun, PR China.
Wang
Chunxu
C
Ji
Nan
N
Lu
Zhicheng
Z
Zhou
Tieli
T
Zhao
Bing
B
Lombardi
John R
JR
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
D011137:Polystyrenes; D012834:Silver