Title

Temperature Dependence of Triton X-100 Micelle Size and Hydration

Document Type

Article

Publication Date

1995

Publication Title

Langmuir

Abstract

Quasi-elastic light scattering spectroscopy was used to measure the mutual diffusion coefficient, D,, of Triton X-100 micelles in aqueous solution and the translational diffusion coefficient, D,, of mesoscopic probes in the same solutions. We apply conventional hydrodynamic treatments of diffision under the assumption that Triton X-100 minimal micelles are adequately represented as hard spheres. Dm and D, measured at a series of surfactant concentrations are used to infer the micelle radius, am, aggregation number, N , and degree of hydration, 6, for temperatures 10 5 T 5 50 "C. As T is increased toward the cloud point, am and N increase, the increase in N being especially dramatic above 40 "C, 6 at first increases but then tends to saturate with increasing T.

Comments

The partial support of this work by the National Science Foundation under Grant DMR91-15637 is gratefully acknowledged.

DOI

10.1021/la00001a011

Volume

11

Issue

1