Observation of 3D-Ising exponents in micellar solutions

Abstract

We report measurements of the osmotic susceptibility χ and long-range correlation length ξ of binary mixtures of the nonionic surfactant n-dodecyl octaoxyethylene glycol monoether with ${\mathrm{H}}_2$O and ${\mathrm{D}}_2$O, near the lower consolute temperature. Regardless of which solvent is used, we find 3D-Ising exponent values for both γ and ν, the exponents which describe the divergences of χ and ξ, respectively.