POROUS MATERIALS MADE BY CONFINED SELF-ASSEMBLY OF COLLOIDS: FROM ELECTROCATALYSIS TO PHOTONICS

Dr. Marco Faustini

Sorbonne Université, CNRS, Collège de France, 4, Place Jussieu, Paris, France

In this talk, I will describe our recent initiative in shaping porous materials with "challenging compositions" (oxides, metals,¹ High Entropy Alloys,² and Metal-Organic Frameworks) at multiple scales by « emerging »  approaches based on confined self-assembly of colloids and lithography³.  The goal is to rationally combine the properties of the nanomaterials (composition, reactivity, conductivity, high porosity, sorption selectivity, capillary condensation…) and of ordered (or disordered) structures to achieve multifunctional platforms for fundamental studies and for applications in electrocatalysis, photonics and sensing.

Several strategies will be discussed: (i) confined colloidal self-assembly into droplets₁ and (ii) into elastomeric nanomolds,³ (iii) self-ordering of cracks in colloidal films.⁴

Examples of application of these systems will be presented ranging from electrocatalysis for Oxygen Evolution Reactions in PEM electrolysers,^5,6  thermal sensing,⁷ photonics⁴ or dew engineering.⁸

1 M. Odziomek; et al, Materials Horizons, 2020

2 M.L. De Marco, et al ACS Nano 2022

3 M. Gayrard; et al Nano Letters, 2021

4 M. Odziomek, et al Advanced Materials 2022

5 M.Faustini et al Advanced Energy Materials 2019

6 M. Elmaalouf; M. Odziomek; et al Nature Communications, 12, 3935, 2021.

7 C. Avci et al Advanced Materials, 2021

8 M. Faustini, et al ACS Nano 2018