Small angle X-ray scattering of microemulsions

  • U. Würz
Amphiphile Solutions
Part of the Progress in Colloid & Polymer Science book series (PROGCOLLOID, volume 76)


We have measured the small angle X-ray scattering of several water-n-octanepolyglycolether microemulsions covering a wide range of amphiphile concentrations, while keeping near to the top of the three-phase triangle in its symmetrical position. The resulting scattering curves are in excellent agreement with the formula derived by Teubner and Strey [13] in the context of a Landau-type expansion with negative gradient term. The correlation lengths involved increase by a factor of 25 when going from the highest to the lowest amphiphile concentrations used. The outer part of the curves are consistent with Porod’s law, implying a black and white structure. At even larger angles, deviations from Porod’s law occur, which can be attributed to a monolayer interface.

Key words

Small angle X-ray scattering microemulsions Porod’s law Teubner-Strey formula 


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  1. 1.
    Auvray L, Cotton J-P, Ober R, Taupin C (1984) J Phys 45:913–928Google Scholar
  2. 2.
    de Gennes P, Taupin C (1982) J Phys Chem 86:2294CrossRefGoogle Scholar
  3. 3.
    Glatter O, Kratky O (1982) Small angle X-ray Scattering. Academic Press, New YorkGoogle Scholar
  4. 4.
    Griffiths RB (1974) J Chem Phys 60:195CrossRefGoogle Scholar
  5. 5.
    Hoar T, Schulmann JH (1943) Nature, London 152:102Google Scholar
  6. 6.
    Kahlweit M, Strey R (1985) Angew Chemie 24:654CrossRefGoogle Scholar
  7. 7.
    Kahlweit M, Strey R, Firman P, Haase D (1985) Langmuir 1:281CrossRefGoogle Scholar
  8. 8.
    Kahlweit M, Strey R, Firman P, Haase D (1986) J Phys Chem 90:671CrossRefGoogle Scholar
  9. 9.
    Landau LD, Lifschitz EM (1979) Statistische Physik. Adademie Verlag, BerlinGoogle Scholar
  10. 10.
    Ninham BW, Barnes IS, Hyde ST, Derian PJ, Zemb TN (1987) Europhys Lett 4:561CrossRefGoogle Scholar
  11. 11.
    Ornstein LS, Zernike F (1918) Phys Z 29:134Google Scholar
  12. 12.
    Porod G (1951) Kolloid Z 124:83; (1952) 125:51CrossRefGoogle Scholar
  13. 13.
    Teubner M, Strey R (1987) J Chem Phys 87:3195CrossRefGoogle Scholar
  14. 14.
    Widom B (1986) J Chem Phys 84:6943CrossRefGoogle Scholar
  15. 15.
    Würz U, Chan SK, Döpkens J (1983) Ber Bunsenges Phys Chem 87:213Google Scholar

Copyright information

© Dr. Dietrich Steinkopff Verlag GmbH & Co. KG 1988

Authors and Affiliations

  • U. Würz
    • 1
  1. 1.Max-Planck-Institut für Biophysikalische ChemieGöttingenF.R.G.

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