Dynamic Light Scattering Studies of Dodecyldimethyl-Ammonium Chloride Micelles

  • A. Flamberg
  • R. Pecora
Part of the NATO Advanced Study Institutes Series book series (NSSB, volume 73)


In this work, we use the dynamic light scattering technique of photon correlation spectroscopy to study the properties of micellar dodecyldmethyl-ammonium chloride (C12H25(CH3) 2NHC1, abbreviated DDAC). This system has been extensively studied by S. Ikeda and co-workers1 using surface tension, viscosity, static light scattering and C-13 NMR measurements. From these studies it was observed that at surfactant concentrations well above the critical micelle concentration the micelles undergo some kind of transition as the ionic strength is changed by adding increasing amounts of NaCl. From the evidence thus far obtained, a transition from spherical micelles at low salt concentrations to flexible rod-like micelles at high salt concentrations has been proposed. This theory has also been used to explain data from another well-studied micelle system, SDS,2 but much controversy exists.3


Surfactant Concentration Hydrodynamic Radius Spherical Micelle Static Light Scattering Translational Diffusion Coefficient 
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    S. Ikeda, S. Ozeki, and M. Tsunoda, J. Colloid Interface Sci. 73: 27 (1980).CrossRefGoogle Scholar
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    P. J. Missel, N. A. Mazer, G. B. Benedek, C. Y. Young, and M. C. Carey, J. Phys. Chem. 84: 1044 (1980).CrossRefGoogle Scholar
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    M. Corti and V. Degiorgio, in Solution Chemistry of Surfactants, ed. by K. L. Mittel, Plenum Press, New York, 1979, p. 377.Google Scholar
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    C. Y. Young, P. Missel, N. A. Mazer, G. B. Benedek, and M. C. Carey, J. Phys. Chem. 82: 1375 (1978).CrossRefGoogle Scholar
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    B. J. Berne and R. Pecora, Dynamic Light Scattering, Ch. 8, John Wiley, New York, 1976.Google Scholar
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    M. Doi and S. F. Edwards, J. C. S. Faraday II 74: 560 (1978).CrossRefGoogle Scholar

Copyright information

© Plenum Press, New York 1981

Authors and Affiliations

  • A. Flamberg
    • 1
  • R. Pecora
    • 1
  1. 1.Department of ChemistryStanford UniversityStanfordUSA

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