| Автор | René van Roij |
| Дата выпуска | 2000-02-28 |
| dc.description | We discuss the phase behaviour of suspensions of charged colloidal particles, specifically at low salt concentrations. The total free energy F of a three-component system of charged colloids and positive and negative salt ions can be expressed as F = F <sub>DLVO</sub> +F <sub>0</sub> , where F <sub>DLVO</sub> is the free energy of a one-component system of colloidal particles interacting via the DLVO pair potential, and F <sub>0</sub> consists of density-dependent contributions from the salt ions. We argue that F <sub>0</sub> drives a gas-liquid spinodal at low salt concentrations, in accordance with several experimental observations. The underlying mechanism is equivalent to that of the well-established gas-liquid transition in simple electrolytes. The present theory connects directly the classic linearized Poisson-Boltzmann theories for simple electrolytes (Debye-Hückel) and colloidal suspensions (DLVO). |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Attraction or repulsion between charged colloids? A connection with Debye-Hückel theory |
| Тип | paper |
| DOI | 10.1088/0953-8984/12/8A/333 |
| Electronic ISSN | 1361-648X |
| Print ISSN | 0953-8984 |
| Журнал | Journal of Physics: Condensed Matter |
| Том | 12 |
| Первая страница | A263 |
| Последняя страница | A267 |
| Аффилиация | René van Roij; H H Wills Physics Laboratory, Royal Fort, University of Bristol, Bristol BS8 1TL, UK |
| Выпуск | 8A |
