Electrostatic colloid-membrane complexation

Details Electrostatic colloid-membrane complexation Electrostatic colloid-membrane complexation

2003-12-19

arxiv.org/abs/physics/0312121v1

Physics

Biological Physics

7 page, 11 figures

Scientific paper

10.1209/epl/i2004-10068-x

We investigate numerically and on the scaling level the adsorption of a charged colloid on an oppositely charged flexible membrane. We show that the long ranged character of the electrostatic interaction leads to a wrapping reentrance of the complex as the salt concentration is varied. The membrane wrapping depends on the size of the colloid and on the salt concentration and only for intermediate salt concentration and colloid sizes we find full wrapping. From the scaling model we derive simple relations for the phase boundaries between the different states of the complex, which agree well with the numerical minimization of the free energy.

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