R&T CNES : hybrid surface functionalization process

In the context of a collaborative project with CNES - Centre national d'études spatiales (R&T challenge), ALPhANOV aims to develop a hybrid adhesion process for the creation of optical assemblies for space applications. This hybrid process will combine molecular adhesion with ultrashort pulse laser welding.

Photo of molecular adhesion in progress between two fused silica discs. The section displaying interferences is the area that has not yet adhered.

PROJECT SUBJECT

Optical components for space applications are typically bonded. However, the adhesive can deteriorate due to the extreme temperature and pressure conditions encountered in the spatial environment.

To overcome this issue, ALPhANOV proposes to develop a non-adhesive bonding process for various material combinations. These material combinations can include homogeneous assemblies such as two glassy materials or heterogeneous assemblies like a metal and a dielectric material.

The developed process will combine two methods : molecular adhesion and laser welding. Molecular adhesion allows for the generation of Van der Waals bonds, which can be transformed into covalent bonds. Laser welding with an ultrashort pulse laser will further strengthen the previously created bonds.

ALPhANOV'S ROLE

ALPhANOV's role is to conduct various experiments to develop the hybrid surface functionalization process. More specifically, ALPhANOV will work on surface treatment methods for molecular adhesion and laser welding. We will also be responsible for characterizing the assembled components.

PARTNERS AND FUNDERS