Cover Image, Volume 35, Issue 4

The cover features a snapshot from a molecular dynamics simulation of an ionic fluid mixture. The four spherical particle species, shown here, exhibit strong asymmetry in their hard‐core diameters and electric charges. The diameters of the small red and blue particles are exaggerated by a factor of 15 in the figures. The obtained results can be used to extract colloidal effective interaction potentials, including nonsaturated effective charge numbers, at a high‐numerical efficiency. The method described by Marco Heinen, Elshad Allahyarov, and Hartmut Löwen on page 275 could be augmented to include colloidal surface chemistry in future projects.