The extracellular matrix is the polymer soft architecture of a bacterial biofilm. It physically stabilizes the cells and their offspring, giving rise to a 3D living material expressing emergent properties. How this organ assembles in the context of a multispecies biofilm is completely unknown. To gain insights into this question we aim at implementing a recent innovation of Raman microspectroscoppar haguiar - Thèses hors de l'EDPIF