title: Multilayered core-satellite nanoassemblies with fine-tunable broadband plasmon resonances.
abstract: We report on a robust nanotemplating approach to synthesize plasmonic multilayered core-satellite (MCS) nanoassemblies. Templated with gold nanorods, ultrathin Au/Ag alloy cages and satellite gold nanoparticles can be constructed sequentially by galvanic replacement reactions and electrostatic self-assembly, respectively, forming structurally well-defined MCS. The MCS nanoassemblies exhibit strong broadband plasmon resonances from ∼440 to ∼1100 nm, and their resonant features can be fine-tuned by adjusting the size and number density of satellite nanoparticles and by adjusting the thickness of the silica spacer between cage and satellite particles. Such fine-engineered MCS nanoassemblies enable precise programming of the strength and distribution of "hot spots" to maximize the overall enhancement of surface enhanced Raman scattering.
authors: Department of Chemical Engineering, Monash University, Clayton 3800, Victoria, Australia. wenlong.cheng@monash.edu.
authors: Wei
authors: W
authors: Xiong
authors: Debabrata
authors: D
authors: Sikdar
authors: Lim Wei
authors: LW
authors: Yap
authors: Malin
authors: M
authors: Premaratne
authors: Xinyong
authors: X
authors: Li
authors: Wenlong
authors: W
authors: Cheng