Large-Scale Au Nanoparticle Cluster Arrays with Tunable Particle Numbers Evolved from Colloidal Lithography.
writer：Liping Fang, Xueyao Liu, Siyuan Xiang, Wendong Liu, Huaizhong Shen, Zibo Li, Kai Zhang, Wei Song,
keywords：nanoparticle cluster arrays, tunable particle numbers, large-scale, colloid lithography, polymer, controllable self-assembly
source：期刊
specific source：Nanotechnology
Issue time：2018年
The assembly of metal nanoparticles (NPs) can regulate their plasmon resonance properties to
pursue the best properties for applications. However, the controllable assembly of large-scale
metal NP cluster arrays remains a signi?cant challenge. This paper presents a novel strategy to
prepare large-scale Au NP cluster arrays based on colloidal lithography and template-guided
self-assembly technique. The NPs arrays are fabricated by introducing Au NPs onto the
quaternized poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA) brush templates via
electrostatic interaction. The number of Au NPs in cluster can be arbitrarily tuned by changing
the surface area of the polymer templates created by colloidal lithography, which resulted in
tunable plasmonic properties. The prepared Au NP cluster arrays were used for surface enhanced
Raman scattering (SERS) and the SERS properties of the Au NP cluster arrays were studied.