Optical Properties of Substrate Supported Mixtures of Silver and Gold NanoparticlesPublic Deposited
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Silver and gold have been extensively explored in the field of nanoscience owing to their strong plasmonic responses in the visible region of the spectrum. Herein, mixtures of Au and Ag nanoparticles (NPs) were combined to achieve new nanoarchitectures with useful electromagnetic properties. It was predicted that these mixtures would produce materials with multiple plasmon modes providing opportunity for greater manipulation of light within one simple system. The spectral information obtained from individual depositions of NPs provided information on the light extinction exhibited by the nanomaterials. For AgNCs and AuNPs on polystyrene (PS) dipolar resonances at 439 nm and at 530 nm were obtained respectively. Simple computations were proceeded for the design of mixtures of nanoparticles having a 1:1 extinction of AuNP:AgNCs, and the mix was deposited on a PS film. The plasmonic modes obtained in the mixture are tunable across the UV-vis-NIR spectrum by manipulation of their local environment.
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