Charge renormalization and phase separation in colloidal suspensions

Details Charge renormalization and phase separation in colloidal suspensions Charge renormalization and phase separation in colloidal suspensions

2000-10-23

arxiv.org/abs/cond-mat/0010352v1

Europhys. Lett. 53, 86 (2001)

Physics

Condensed Matter

Soft Condensed Matter

7 pages, Europhysics Letters (in press)

Scientific paper

10.1209/epl/i2001-00127-x

We explore the effects of counterion condensation on fluid-fluid phase separation in charged colloidal suspensions. It is found that formation of double layers around the colloidal particles stabilizes suspensions against phase separation. Addition of salt, however, produces an instability which, in principle, can lead to a fluid-fluid separation. The instability, however, is so weak that it should be impossible to observe a fully equilibrated coexistence experimentally.

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