**Acknowledgements**

The authors warmly thank Y. Bréchet, C. Celle, D.P. Langley, T. Sannicolo, S. Aghazadehchors and J.-P. Simonato for fruitful discussions. This work was performed within the framework of the Centre of Excellence of Multifunctional Architectured Materials 'CEMAM' n° AN-10-LABX-44-01. This work was funded by the Agence Nationale de Recherche (ANR, France) via the programme ANR-16-CE05-0021 (Despatch), ANR-18-CE09-0041 (Meaning), ANR-18-CE09-0036 (Panassé) and ANR-15-CE05-0019 (Indeed). This work was as well supported by Région Auvergne Rhône-Alpes through the project Pack Ambition Recherche 2018 Eternité. The Carnot Energies du Futur is acknowledged through the project FREE.
