Scientists discover that like-charged particles can sometimes attract

[yoginka]

https://comms.iop.org/c/1A5PZeudj101FsOQYiigpQIC8g
" In work recently published in Nature Nanotechnology, researchers at the University of Oxford have demonstrated the attraction of like-charged particles in solutions."

Comments

[yoginka]

"Current theories of charge attraction within solvents consider the fluid to be a continuum but overlook some of the finer details of the solvent and how it interacts with solid interfaces. However, new theories suggest that the behaviour of the solvent at an interface has a significant influence on the total interaction free energy of two charge-carrying objects when they approach each other."

[evgeniirudnyi]

Раствор - дело непростое. Например, существуют ли многозарядные отрицательные ионы в растворе типа SO4(2-)? В газовой фазе они нестабильны.

[yoginka]

Да, они так и пишут, что дело с жидкой фазой это связано:

"One of the areas where like-charge attraction is seen the most is within fluids, and the interaction of solid matter with fluids."

Насчет SO4(2-) не заметила.

Вот так объясняют:

"The reason for the like charges attracting each other is attributed to the solvent having a large influence on the interparticle interactions, which can spontaneously assemble the like-charged particles in the solution. This is because the concerted action of electrical charge at the interface and the local interfacial solvation structure generate an “electrosolvation force” between the negatively charged functional groups in the solution, causing the particles to attract each other and cluster."