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Evidence of a finite screening length of the repulsive potential among copolymer micelles in a room temperature ionic liquid
V. Villari, N. Micali, A. Triolo
347 - 360
10.3254/978-1-61499-071-0-347
Proceedings of the International School of Physics "Enrico Fermi"
Volume 176: Complex Materials in Physics and Biology
Abstract

A light scattering approach on a micellar solution formed by a PS-PEO diblock copolymer was used to investigate the charge fluctuations of the solvent, a room temperature ionic liquid. The results suggest a pairwise potential model for the intermicellar interactions consisting of a hard sphere core and a repulsive Yukawa tail. The screening length is consistent with the nanometric scale of the charge fluctuations of the solvent, as estimated by recent theoretical works on the fluid structure of a molten salt in proximity of a charged surface.

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