Universal reduction of pressure between charged surfaces by long-wavelength surface charge modulation

Details Universal reduction of pressure between charged surfaces by long-wavelength surface charge modulation Universal reduction of pressure between charged surfaces by long-wavelength surface charge modulation

2002-10-14

arxiv.org/abs/cond-mat/0210291v1

Physics

Condensed Matter

Soft Condensed Matter

8 pages 1 figure, Europhys. Lett., in press

Scientific paper

10.1209/epl/i2002-00264-2

We predict theoretically that long-wavelength surface charge modulations universally reduce the pressure between the charged surfaces with counterions compared with the case of uniformly charged surfaces with the same average surface charge density. The physical origin of this effect is the fact that surface charge modulations always lead to enhanced counterion localization near the surfaces, and hence, fewer charges at the midplane. We confirm the last prediction with Monte Carlo simulations.

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