Suspensions of solid particles in a liquid (e.g., cement paste, ocean sediments, landslides) exhibit a range of peculiar rheological behaviors. In many industrial processes, their transport is highly energy-intensive, making it essential to understand their rheology. This is especially important in concentrated regimes, where their viscosity can rise by orders of magnitude. In these conditions, suspension flow properties are strongly dependent on the nature of the local interactions and con-tacts between particle (friction, adhesion, ...), yet this key interrelation is poorly understood due to the difficulty of precisely controlling and measuring such interactions in particulate systems. This internship is part of the PEGASUS ANR project, which aims precisely to design and study particulate systems whose friction and adhesion can be tuned through physicochemical stimuli, in order to develop a deeper understanding of dense suspension mechanics.