Density Dependent Interactions and Structure of Charged Colloidal Dispersions in the Weak Screening Regime

by: Rojas LF Ochoa, Casta\, V Lobaskin, A Stradner, F Scheffold, P Schurtenberger

Physical Review Letters, Vol. 100, No. 17. (2008)

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Abstract

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.

@article{citeulike:2759111, abstract = {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.}, author = {Ochoa, Rojas L. F. and Casta and Lobaskin, V. and Stradner, A. and Scheffold, F. and Schurtenberger, P. }, citeulike-article-id = {2759111}, doi = {10.1103/PhysRevLett.100.178304}, journal = {Physical Review Letters}, keywords = {2008, charge, colloids, structure}, number = {17}, posted-at = {2008-05-05 21:13:09}, priority = {2}, publisher = {APS}, title = {Density Dependent Interactions and Structure of Charged Colloidal Dispersions in the Weak Screening Regime}, url = {http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal\&id=PRLTAO000100000017178304000001\&idtype=cvips\&gifs=yes}, volume = {100}, year = {2008} }

RIS record

TY - JOUR ID - citeulike:2759111 TI - Density Dependent Interactions and Structure of Charged Colloidal Dispersions in the Weak Screening Regime JF - Physical Review Letters VL - 100 IS - 17 PB - APS N2 - 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. KW - 2008 KW - charge KW - colloids KW - structure AU - Ochoa, Rojas AU - Casta\ AU - Lobaskin, V AU - Stradner, A AU - Scheffold, F AU - Schurtenberger, P PY - 2008/// UR - http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PRLTAO000100000017178304000001&idtype=cvips&gifs=yes ER -

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