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Evening over a tropical forest

 

Auteur : Jakub KUSZ
Image candidate Prix Jacquet 2022
ENS Lyon
Parution : 12/11/2022

La publication de cette image par des tiers est soumise à l’autorisation de l’auteur.

Descriptif technique :

Optical microscope with magnitude x2, photography of the silica thin film coated on a Si wafer.

Technique de réalisation/Apport scientifique :

A 400-500 nm thick mesoporous hybrid silica coating was obtained by combining the sol-gel process and dip-coating technique. During template removal and thermal treatment, cracks appear in zones of non-uniform thickness, resulting in an astonishing, colorful reflection of light. The surface energy, adhesion to the substrate, and chemical composition of the film determine the morphology of the cracks.

Provenance : ENS de Lyon, Laboratoire de Chimie