Events

Abstract: Nanocomposites are nowadays one of the most promising architectures for the production of highly tunable systems  specially at the optical range. In particular, the possibility to localize and enhance the electromagnetic (EM) field in sub–wavelength regions is of particular interest towards the application of photonic–plasmonic nanostructures to areas as optical sensing.

In this talk, I will present diverse hierarchical nanostructures we have designed and synthesized combining two main building blocks: inorganic mesoporous thin films (MTFs) and fotoactive nanoentities as metallic nanoparticles or/and Q–dots. On one side, MTFs are ideal platforms for optical platforms since they are highly reproducible, transparent with high homogeneous area. The accessible mesoporosity of the MTFs widens up the use of these thin films since the optical properties became tunneable and they allow to harbor fotoactive nanoentities. On the other side, we have used diverse models to optimize the interplay between nanoparticles and photoactive nanoentities included in the MTF pores incrementing their excitation rate due to EM field enhancement. EM models, in particular, have been used to understand the optical response of platforms based on the stacking MTFs as photonic crystals or as TAMM resonators allowing to design hybrid nanostructures that enhance and tune the reflectivity obtaining platforms with novel andunusualoptical responses.

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[1] Leandro Missoni, Guillermo P Ortiz, María Luz Martínez Ricci, Victor J Toranzos, W Luis Mochán, “Rough 1D Photonic Crystals: a transfer matrix approach”, Volume 109, November 2020, 110012
[2] Rodrigo Martínez Gazoni, et al; “Designed nanoparticle–mesoporous multilayer nanocomposites as tunable plasmonic–photonic architectures for electromagnetic field enhancement” J. Mater. Chem. C, 5, 3445–3455 (2017)
[3] Diego Onna, Ignacio Perez Ipiña, Agustina Casafuz, Álvaro Mayoral García, M.Ricardo Ibarra García, Sara A. Bilmes, María Luz Martínez Ricci*, “Diameter Distribution by Deconvolution (DdD): Absorption spectra as a practical tool for semiconductor nanoparticle PSD determination”, Nanoscale Advances, 2019, 1, 3499 – 3505
[4] PCT/IB2016/054327: “Method for structural colouration of Anodised Aluminium by Forming Photonic Crystals by Means of Current Pulses”. Invention Authors: E. Calvo, M. L. Martínez Ricci, L. Missoni, F. Ojeda. (2017)
[5] Onna, D., Marchi, M. C., Martínez Ricci, María Luz*, and Aldabe Bilmes, Sara*. “Loading insoluble sulfides in mesoporous oxide films from precursors in solution”. Journal of Sol–Gel Science and Technology, 2022, 1–15