Thu, 21 Aug 2008 08:18:23 BST CiteULike: dchens Scheffold http://www.citeulike.org/user/dchen/author/Scheffold CiteULike.org en-gb Copyright © 2004-2008 citeulike.org http://www.citeulike.org/user/dchen/article/2759111 <i>Physical Review Letters, Vol. 100, No. 17. (2008)</i><br /><br />We determine the structure of charge-stabilized colloidal suspensions at low ionic strength over an extended range of particle volume fractions using a combination of light and small angle neutron scattering experiments. The variation of the structure factor with concentration is analyzed within a one-component model of a colloidal suspension. We show that the observed structural behavior corresponds to a nonmonotonic density dependence of the colloid effective charge and the mean interparticle interaction energy. Our findings are corroborated by similar observations from primitive model computer simulations of salt-free colloidal suspensions. Density Dependent Interactions and Structure of Charged Colloidal Dispersions in the Weak Screening Regime Rojas Ochoa Casta\ V Lobaskin A Stradner F Scheffold P Schurtenberger doi:10.1103/PhysRevLett.100.178304 Physical Review Letters, Vol. 100, No. 17. (2008) 2008-05-05T20:12:24-00:00 2008 Physical Review Letters 100 17 APS 2008 charge colloids structure