Tunable Black Gold: Controlling the Near‐Field Coupling of Immobilized Au Nanoparticles Embedded in Mesoporous Silica Capsules

@article{ElKabbash2017TunableBG,
  title={Tunable Black Gold: Controlling the Near‐Field Coupling of Immobilized Au Nanoparticles Embedded in Mesoporous Silica Capsules},
  author={Mohamed ElKabbash and Ana Sousa-Castillo and Quang Dong Nguyen and Rosal{\'i}a Mari{\~n}o-Fern{\'a}ndez and Nathaniel Hoffman and Miguel A. Correa‐Duarte and Giuseppe Strangi},
  journal={Advanced Optical Materials},
  year={2017},
  volume={5}
}
Efficient light‐to‐heat conversion is central for various applications such as thermo‐photovoltaics and solar steam generation. Although metals can strongly absorb light and generate heat, their free electrons shield the electric field before any substantial penetration in the metal. Excitation of surface plasmons can suppress metal reflection and convert it into a black metal, for example, black gold. In this work, mesoporous silica capsules grafted with immobilized Au nanoparticles (NPs) with… 
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References

SHOWING 1-10 OF 30 REFERENCES
Flexible thin-film black gold membranes with ultrabroadband plasmonic nanofocusing for efficient solar vapour generation
TLDR
Large area, flexible thin-film black gold membranes are demonstrated, which have multiscale structures of varying metallic nanoscale gaps (0–200 nm) as well as microscale funnel structures that allow heat localization within the few micrometre-thick layer and continuous water provision through micropores.
Preparation and Characterization of Gold Nanoshells Coated with Self-Assembled Monolayers
This paper describes the functionalization of the surfaces of gold nanoshells, which consist of silica nanoparticles coated with a continuous thin layer of gold. Previous studies have shown that gold
Plasmonic black gold by adiabatic nanofocusing and absorption of light in ultra-sharp convex grooves.
TLDR
It is demonstrated experimentally that two-dimensional arrays of sharp convex grooves in gold ensure efficient (>87%) broadband (450-850 nm) absorption of unpolarized light, reaching an average level of 96%.
Near-unity transparency of a continuous metal film via cooperative effects of double plasmonic arrays
TLDR
This motif may provide a new alternative approach to obtain transparent and highly conducting metal structures with potential applications in transparent conductors, plasmonic filters, and highly integrated light input and output components.
Black Gold: Plasmonic Colloidosomes with Broadband Absorption Self-Assembled from Monodispersed Gold Nanospheres by Using a Reverse Emulsion System.
TLDR
A facile approach for the fabrication of novel black plasmonic colloidosomes assembled from Au nanospheres is developed by an emulsion-templating strategy based on a new reverse water-in-1-butanol emulsion system, in which the water emulsion droplets can dissolve into 1- butanol (oil) phase at an appropriate rate.
Shape and size dependence of radiative, non-radiative and photothermal properties of gold nanocrystals
Driven by the search for new materials with interesting and unique properties and also by the fundamental question of how atomic and molecular physical behaviour develops with increasing size, the
Automatically acquired broadband plasmonic-metamaterial black absorber during the metallic film-formation.
TLDR
This paper theoretically propose and experimentally demonstrate a unique broadband plasmonic-metamaterial absorber by utilizing a sub-10 nm meta-surface film structure to replace the precisely designed metamaterial crystal in the common metal-dielectric-metal absorbers.
Metallic nanoparticle arrays: a common substrate for both surface-enhanced Raman scattering and surface-enhanced infrared absorption.
Nanoshell arrays have recently been found to possess ideal properties as a substrate for combining surface enhanced raman scattering (SERS) and surface enhanced infrared absorption (SEIRA)
Nano-particle plasmonics in active media
Localized surface plasmon excitations in metallic nanoparticles with either absorbing or amplifying media are analyzed. In the case of absorption, we present the first direct measurements of enhanced
Size-Dependence of the Plasmonic Near-Field Measured via Single-Nanoparticle Photoimaging
Plasmonic nanostructures are being exploited for optical and photovoltaic applications, particularly where field enhancement of optical processes is desirable. Extensive work has focused on the
...
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