Exploiting the Tunable Optical Response of Metallic Nanoshells

Peña‐Rodríguez, Ovidio; Pal, U.

doi:10.1007/978-3-642-27594-4_3

Cited by 2 publications

(2 citation statements)

References 168 publications

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“…Finally, it should be noted that the extinction efficiency is somewhat attenuated as the core is shifted. This effect, common to all nanoshells [43], not only for eccentric ones, is related with the reduction of the metal layer. However, in spite of the reduction, the extinction efficiency is still intense enough for most applications.…”

Section: Resultsmentioning

confidence: 99%

Near- and Far-Field Optical Response of Eccentric Nanoshells

et al. 2017

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We study the optical response of eccentric nanoshells (i.e., spherical nanoparticles with an eccentric spherical inclusion) in the near and the far field through finite-difference time-domain simulations. Plasmon hybridization theory is used to explain the obtained results. The eccentricity generates a far-field optical spectrum with various plasmon peaks. The number, position, and width of the peaks depend on the core offset. Near-field enhancements in the surroundings of these structures are significantly larger than those obtained for equivalent concentric nanoshells and, more importantly, they are almost independent of the illumination conditions. This opens up the door for using eccentric nanoshells in applications requiring intense near-field enhancements.

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Section: Resultsmentioning

confidence: 99%

Near- and Far-Field Optical Response of Eccentric Nanoshells

et al. 2017

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“…While this process might resemble the growth of metal seeds on the surfaces of polystyrene or silica particles to form nanoshells, a significant distinction is that it occurs at the gas–water interface, not on solid particles. − An essential question arises: are the nanoshells in this study hollow or filled with a solid material? To address this, electron spin resonance (ESR) spectroscopy, following the addition of 5,5-dimethyl 1-pyrroline N -oxide (DMPO: a spin-trap reagent) and hydrochloric acid (HCl), was conducted.…”

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confidence: 99%

Nanoshell Formation at the Electrically Charged Gas–Water Interface of Collapsing Microbubbles: Insights from Atomic Force Microscopy Imaging

Takahashi,

Shirai,

Sugawa

2023

J. Phys. Chem. Lett.

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AFM imaging has revealed intriguing features when bulk nanobubbles were deposited on a positively charged substrate. Numerous spherical objects, each less than 20 nm in diameter, were observed on the substrate. These objects were adorned with noticeable, tiny protrusions, each measuring a few nanometers. These findings suggest the presence of solid shells contributing to the stability of the gas bodies. Furthermore, electrically charged microbubbles appear to play a critical role in the formation of these solid shells. The collapse of microbubbles in an electrolyte aqueous solution containing iron ions leads to a condensing ionic cloud, creating conditions necessary for solid nucleation at the interface. At the end of the collapsing process, concurrent multinucleation may result in the deposition of solid material on the interface, forming solid shells with specific structures on the surfaces. This study illuminates the phenomenon of electrically charged gas−water interfaces during microbubble collapse and highlights the generation of stabilized nanoshells in aqueous solutions without the need for chemical stabilizers.

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Exploiting the Tunable Optical Response of Metallic Nanoshells

Cited by 2 publications

References 168 publications

Near- and Far-Field Optical Response of Eccentric Nanoshells

Near- and Far-Field Optical Response of Eccentric Nanoshells

Nanoshell Formation at the Electrically Charged Gas–Water Interface of Collapsing Microbubbles: Insights from Atomic Force Microscopy Imaging

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