title: Tailoring the frictional properties of granular media.
abstract: A method of modifying the roughness of soda-lime glass spheres is presented, with the purpose of tuning interparticle friction. The effect of chemical etching on the surface topography and the bulk frictional properties of grains are systematically investigated. The surface roughness of the grains is measured using white-light interferometry and characterized by the lateral and vertical roughness length scales. The underwater angle of repose is measured to characterize the bulk frictional behavior. We observe that the coefficient of friction depends on the vertical roughness length scale.
authors: Max Planck Institute for Dynamics and Self-organization, Am Faßberg 17, D-37077 Göttingen, Germany.
authors: Sonia
authors: S
authors: Utermann
authors: Philipp
authors: P
authors: Aurin
authors: Markus
authors: M
authors: Benderoth
authors: Cornelius
authors: C
authors: Fischer
authors: Matthias
authors: M
authors: Schröter