Interplaying Role of Particle Size and Polymer Layer Thickness on the Large Tunable Optical Response of Polymer-coated Silver Nanostructures

摘要: The interplaying role of particle size and polymer layer thickness on the tunable optical response polymer-coated Ag nanoparticles (NPs) has been studied experimentally theoretically. A large redshift ( $$\sim$$ 38 nm) surface plasmon resonance (SPR) peak position observed for NPs sizes in range 8−18 nm synthesized by polyol process with varying concentration metal precursor (AgNO $$_{3}$$ ) using a surfactant (PVP) as stabilizer. SPR coated PVP argued due to mainly change NP well local dielectric environment vicinity NPs. shift explained considering system metal-core polymer-shell nanostructure. surrounding is Such observation confirmed through theoretical studies changes effective layers core-shell nanostructure found vary linearly increase radius core shell together. However, it exponentially alone. It from detailed study that ratio responsible redshift. Thus, cannot be justified only size. Rather play prominent shift. This can used understand noble organic polymers.