Effect of charge inhomogeneity and mobility on colloid aggregation

Langmuir : the ACS Journal of Surfaces and Colloids
Y S JhoP A Pincus

Abstract

The aggregation of inhomogeneously charged colloids with the same average charge is analyzed using Monte Carlo simulations. We find aggregation of colloids for sizes in the range 10-200 nm, which is similar to the range in which aggregation is observed in several experiments. The attraction arises from the strongly correlated electrostatic interactions associated with the increase in the counterion density in the region between the particles; this effect is enhanced by the discreteness and mobility of the surface charges. Larger colloids attract more strongly when their surface charges are discrete. We study the aggregation as functions of the surface charge density, counterion valence, and volume fraction.

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Citations

Dec 10, 2013·Langmuir : the ACS Journal of Surfaces and Colloids·Burcu Baykal MinskyPaul L Dubin
Jan 21, 2014·Physical Chemistry Chemical Physics : PCCP·Shada A AlsharifMiguel Jose Yacaman
May 23, 2014·The Journal of Physical Chemistry. B·Luis E Sánchez-DíazWei-Ren Chen
Mar 6, 2013·Langmuir : the ACS Journal of Surfaces and Colloids·Yunfeng YanPaul L Dubin
Jun 21, 2013·Langmuir : the ACS Journal of Surfaces and Colloids·Reid C Van Lehn, Alfredo Alexander-Katz
Sep 12, 2013·Langmuir : the ACS Journal of Surfaces and Colloids·Shiqi Zhou
Jan 15, 2015·Langmuir : the ACS Journal of Surfaces and Colloids·Claire DerotMartin In
Dec 24, 2015·The Journal of Chemical Physics·Malihe GhodratRudolf Podgornik
Jan 6, 2015·Physical Chemistry Chemical Physics : PCCP·Oscar D VillarrealMiguel J Yacaman
Feb 7, 2017·Physical Chemistry Chemical Physics : PCCP·Christian Hunley, Marcelo Marucho
Dec 7, 2019·Physical Review Letters·Amin BakhshandehYan Levin
Oct 27, 2020·Physical Chemistry Chemical Physics : PCCP·Amin BakhshandehYan Levin

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