Fri, 25 Jul 2008 04:35:35 BST CiteULike: dchens Addad http://www.citeulike.org/user/dchen/author/Addad CiteULike.org en-gb Copyright © 2004-2008 citeulike.org http://www.citeulike.org/user/dchen/article/2552539 <i>Physical Review Letters, Vol. 99, No. 16. (2007)</i><br /><br />We study the viscoelastic behavior of aqueous foam mixed with solid noncolloidal particles. We show that adding a tiny amount of grains can enhance the elastic and loss shear moduli by more than 1 order of magnitude. The scaling of these moduli with solid volume fraction is in qualitative agreement with that predicted by an effective-medium rigidity percolation model. We present a simple model, based on capillary attraction, to explain the particle-size dependence of the threshold. Rigidity Percolation in Particle-Laden Foams Sylvie Addad Marcel Krzan Reinhard Höhler Benjamin Herzhaft doi:10.1103/PhysRevLett.99.168001 Physical Review Letters, Vol. 99, No. 16. (2007) 2008-03-18T19:16:27-00:00 2007 Physical Review Letters 99 16 APS 2007 colloids foam