Like-charge interactions between colloidal particles are asymmetric with respect to sign. Academic Article

abstract

• Two-dimensional dispersions of colloidal particles with a range of surface chemistries and electrostatic potentials are characterized under a series of solution ionic strengths. A combination of optical imaging techniques are employed to monitor both the colloid structure and the electrostatic surface potential of individual particles in situ. We find that like-charge multiparticle interactions can be tuned from exclusively repulsive to long-range attractive by changing the particle surface composition. This behavior is strongly asymmetric with respect to the sign of the surface potential. Collective long-range attractive interactions are only observed among negatively charged particles.

authors

• Wu, Hung-Jen

published proceedings

• Soft Matter

author list (cited authors)

• Gomez, E. W., Clack, N. G., Wu, H., & Groves, J. T.

citation count

• 31

complete list of authors

• Gomez, Esther W||Clack, Nathan G||Wu, Hung-Jen||Groves, Jay T

publication date

• May 2009

publisher

• Royal Society of Chemistry (RSC)  Publisher

published in

• SOFT MATTER  Journal

keywords

• 0306 Physical Chemistry (incl. Structural)

PubMed Central ID

• 25221611

Digital Object Identifier (DOI)

• 10.1039/B821510C

start page

• 1931

end page

• 1936

volume

• 5

issue

• 9

URL

• http://dx.doi.org/10.1039/b821510c