Micelle sphere-to-rod

Angelico, R., Palazzo, G., Colafemmina, G., Cirkel, P. A., Giustini, M., and Ceglie, A. (1998), Water diffusion and head group mobility in polymer-like reverse micelle Evidence of a sphere-to-rod-sphere transition, J. Phys. Chem. B, 102, 2883-2889. 

The experimental decays from the infinite rods at high salt concentrations in Fig. 4 fit well to the 1-D model. The same model has been used in several investigations of the sphere-to-rod transition and to determine the diffusion coefficients of the probe and quencher in rodlike micelles. However, equations based on other assumptions could fit the experimental data about equally well there is no distinctive feature in the decay that points to the 1-D case. Often one can reject alternative models due to unreasonable values for estimated parameters. A 2-D model, for example, would probably also fit well but would result in too low a value of the diffusion coefficient. Numerical studies demonstrated that 2-D and (with consideration of transient effects) 3-D models generally fit well to 1-D data but with unreasonable values suggested for the parameters, whereas a decay curve from a 2-D structure does not fit to a 1-D model [15]. 

Missel, RJ., Mazer, N.A., Carey, M.C., and Benedeck, G.B., Thermodynamics of the sphere-to-rod transition in alkyl sulfate micelles, in Solution Behavior of Surfactants, vol. 1, Plenum Press, New York, 1982, p. 373. 

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