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Evolution of silver in a eutectic-based Bi2O3–Ag metamaterial

Abstract : The development of novel manufacturing techniques of nano-/micromaterials, especially metallodielectric materials, has enabled dynamic development of such fields as nanoplasmonics. However, the fabrication methods are still mostly based on time-consuming and costly top-down techniques limited to two-dimensional materials. Recently, directional solidification has been proposed and utilized for manufacturing of volumetric nanoplasmonic materials using the example of a Bi2O3–Ag eutectic-based nanocomposite. Here, we explain the evolution of silver in this composite, from the crystal growth through the post-growth annealing processes. Investigation with tunneling electron microscopy shows that silver initially enters the composite as an amorphous AgBiO3 phase, which is formed as a wetting layer between the grains of Bi2O3 primary phase. The post-growth annealing leads to decomposition of the amorphous phase into Bi2O3 nanocrystals and intergranular Ag nanoparticles, providing the tunable localized surface plasmon resonance at yellow light wavelengths.
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Submitted on : Wednesday, August 1, 2018 - 4:55:14 PM
Last modification on : Thursday, September 24, 2020 - 6:30:08 PM
Long-term archiving on: : Friday, November 2, 2018 - 2:43:53 PM

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K. Sadecka, Marie-Hélène Berger, K. Orlinski, I. Jozwik, D. A. Pawlak. Evolution of silver in a eutectic-based Bi2O3–Ag metamaterial. Journal of Materials Science, Springer Verlag, 2017, 52 (10), pp.5503-5510. ⟨10.1007/s10853-016-0746-2⟩. ⟨hal-01504431⟩

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