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| - A Small-Angle Neutron and Static Light Scattering Study of Micelles Formed in AqueousMixtures of a Nonionic Alkylglucoside and an Anionic Surfactant
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| - The size and shape of micelles formed in aqueous mixtures of the anionic surfactant sodium dodecyl sulfate(SDS) and the nonionic sugar-based surfactant n-decyl β-D-glucopyranoside (C10G) at different concentrationsof added salt have been investigated with small-angle neutron and static light scattering. Rather small prolateellipsoidal micelles form in the absence of added salt and at [NaCl] = 10 mM in D2O. The micelles growconsiderably in length to large rods as the electrolyte concentration is raised to [NaCl] = 0.1 M. In excessof nonionic surfactant ([SDS]/[C10G] = 1:3) at [NaCl] = 0.1 M in D2O, several thousands of Ångstroms longwormlike micelles are observed. Most interestingly, a conspicuously large isotope solvent effect was observedfrom static light scattering data according to which micelles formed at [SDS]/[C10G] = 1:3 and [NaCl] = 0.1M in H2O are at least five times smaller than micelles formed in the corresponding samples in D2O.
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