Volume 90, Number 4, May 2010
|Number of page(s)||6|
|Section||Condensed Matter: Structural, Mechanical and Thermal Properties|
|Published online||17 June 2010|
Structure of charged colloid-polymer mixtures
Departamento de Física Aplicada, Grupo de Física de Fluidos y Biocoloides, Universidad de Granada E-18071 Granada, Spain, EU
Corresponding author: firstname.lastname@example.org
Accepted: 2 June 2010
We use a light scattering technique to investigate the effect of adding non-adsorbing charged polymers to a very dilute electrostatically stabilized colloidal suspension at low electrolyte concentration. The experimental results show that, as the polymer concentration increases, the main peak of the colloid-colloid structure factor moves to higher q-values, which cannot be only due to the screening of the direct colloid-colloid electrostatic repulsion. We show that the colloid-polymer electrostatic repulsions lead to enhanced depletion forces that have a strong influence on the colloid structure, even for diluted suspensions. The experimental results are interpreted using the off-lattice Polymer Reference Interaction Site Model (PRISM), and very good agreement is found for all polymer concentrations.
PACS: 61.20.-p – Structure of liquids / 82.70.Dd – Colloids
© EPLA, 2010
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.