ArticleThe journal of physical chemistry. C, Nanomaterials and interfaces2025
Plasmonic Copper Nanocubes Coupled to a Film for Near-Infrared Fluorescence Enhancement.
Article in The journal of physical chemistry. C, Nanomaterials and interfaces, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Cu nanocubes have been found to support a strong and narrow localized surface plasmon resonance (LSPR) but are restrained by limited spectral tunability. In this study, a film-coupled Cu nanocube system is designed and systematically studied using finite-difference time-domain based numerical simulations. Because of the coupling between the Cu nanocube and the underlying film, a plasmonic cavity mode is generated and featured by a spectrally tunable LSPR and an intense near field. By tailoring the resonance to the near-infrared (NIR) wavelength region, we demonstrate that the film-coupled Cu nanocube system supports a large NIR fluorescence emission enhancement owing to the strong excitation rate enhancement and the quantum efficiency enhancement. The knowledge obtained in this study can guide future design of low-cost Cu-based optical devices.
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