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Density functional theory for a macroion suspension | | Patrick B. Warren
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21 Jun 2005 | | Subject: | Soft Condensed Matter; Statistical Mechanics | cond-mat.soft cond-mat.stat-mech | | Abstract: | A density functional theory for a macroion suspension is examined, where the excess free energy corresponds to the macroion self energy arising from the polarisation of the supporting electrolyte solution. This is treated within a linearised or Debye-Huckel approximation. The model predicts liquid-liquid phase separation at low ionic strength. The interface structure and surface tension between coexisting phases is calculated using a variational approximation. Results are also obtained for structure factors, which are shown to obey the Stillinger-Lovett moment conditions. As one approaches the critical points, the structure factors may diverge at a non-zero wavevector, indicating that the critical points could be replaced by charge-density-wave phases. | | Source: | arXiv, cond-mat/0506537 | | Services: | Forum | Review | PDF | Favorites | |
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