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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Journal of Materials Science, Springer Verlag, 2017, 52 (10), pp.5503-5510. 〈10.1007/s10853-016-0746-2〉
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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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