Light Scattering and SAXS Study of AOT Microemulsion at Low Size Droplet


We study collective diffusion coefficient (Dc) of Water-in-oil nanoemulsions (L2 phase) stabilized by AOT and dispersed in n-Decane oils by dynamic light scattering (DLS). At constant water concentration we vary the oil concentration and there is clear evidence for a changing collective diffusion coefficient of the droplets in AOT nanoemuslion. The collective diffusion coefficient in AOT nanoemulsions is studied from relaxation investigations with dynamic light scattering. Also, we study the collective diffusion coefficient (Dc) of droplets with add the TBAC to the droplets of AOT nanoemulsion. We discuss the results with study structural investigations with small-angle x-ray scattering. The results of this study suggest that the formation of non-spherical aggregates at low concentration of droplets can describe the behavior of the collective diffusion coefficient at AOT nanoemulsion.

Share and Cite:

S. Sharifi, M. Amirkhani, J. Asla, M. Mohammadi and O. Marti, "Light Scattering and SAXS Study of AOT Microemulsion at Low Size Droplet," Soft Nanoscience Letters, Vol. 2 No. 1, 2012, pp. 8-12. doi: 10.4236/snl.2012.21002.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] Peter Schurtenberger, “Static and Dynamic Properties of Micelles, Microemulsions and Vesicles,” Colloid & Interface Science, Vol. 1, No. 6, 1996, pp. 773-778.
[2] Y. Hattori, H. Ushiki, L. Courbin and P. Panizza, “Slow Relaxation Mode in Concentrated Oil-In-Water Microemulsions Consisting of Repulsive Droplets,” Physical Review E, Vol. 75, No. 2, 2007, pp. 021504-021511. doi:10.1103/PhysRevE.75.021504
[3] J. Gapinski, A. Patkowski, A. J. Banchio, P. Holmqvist, G. Meier, M. P. Lettinga, and G. N?gele, “Collective Diffusion in Charge-Stabilized Suspensions: Concentration and Salt Effects,” Journal of Chemical Physics, Vol. 126, No. 10, 2007, pp. 104905-104917. doi:10.1063/1.2538891
[4] G. D. J. Phillies, G. B. Benedek and N. A. Mazer, “Diffusion in Protein Solutions at High Concentrations: A. Study by Quasielastic Light Scallering Spectroscopy,” Journal of Chemical Physics, Vol. 65, No. 5, 1976, p. 1883. doi:10.1063/1.433282
[5] P. Prinsen and T. Odijk, “Collective Diffusion Coefficient of Proteins with Hydrodynamic, Electrostatic, and Adhesive Interactions,” Journal of Chemical Physics, Vol. 127, No. 11, 2007, pp. 115102-115109.
[6] A. P. Minton and P. D. Ross, “Concentration Dependence of the Diffusion Coefficient of Hemoglobin,” The Journal of Physical Chemistry, Vol. 82, No. 17, 1978, pp. 1934-1938. doi:10.1021/j100506a016
[7] N. Meechai, A. M. Jamieson and J. Blackwell, “Translational Diffusion Coefficients of Bovine Serum Albumin in Aqueous Solution at High Ionic Strength,” Journal of Colloid and Interface Science, Vol. 218, No. 1, 1999, pp. 167-175.
[8] M. R. Wattenbarger, V. A. Bloomfield, Z. Bu and P. S. Russo, “Tracer Diffusion of Proteins in DNA Solutions,” Macromolecules, Vol. 25, No. 20, 1992, pp. 5263-5265. doi:10.1021/ma00046a024
[9] J. B. Bishop, W. J. Fredericks, S. B. Howard and T. Sawada, “Dynamic Light Scattering Analysis of Solutions from which Lysozyme Crystals Grow,” Journal of Crystal Growth, Vol. 122, No. 1-4, 1992, pp. 41-49. doi:10.1016/0022-0248(92)90224-7
[10] J. Sj?blom, K. Rosenqvist and P. Stenius, “Reversed Micellar Solutions in the System Sodium Octanoate/Decanol/Water: Model Calculations and Dynamic Light Scattering Measurements,” Colloid & Polymer Science, Vol. 260, No. 1, 1982, pp. 82-88. doi:10.1007/BF01447679
[11] A. Dobek, “Measurements of Light Scattering Changes Induced by a Strong Optical Field in Solutions of tRNA,” Journal of Polymer Science: Polymer Physics Edition, Vol. 19, No. 2, 1981, pp. 273-280. doi:10.1002/pol.1981.180190208
[12] F. Mallamace, N. Micali and C. Vasi, “Viscoelastic Properties of Charged Colloids, Polystyrene, and Silica-Water Suspensions,” Physical Review A, Vol. 42, No. 12, 1990, pp. 7304-7311. doi:10.1103/PhysRevA.42.7304
[13] Dale W. Schaefer, “Colloidal Suspensions as Soft Core Liquids,” Journal of Chemical Physics, Vol. 66, No. 9, 1977, pp. 3980-3985. doi:10.1063/1.434449
[14] P. N. Segrè, S. P. Meeker, P. N. Pusey and W. C. K. Poon, “Viscosity and Structural Relaxation in Suspensions of Hard-Sphere Colloids,” Physical Review Letters, Vol. 75, No. 5, 1995, pp. 958-961. doi:10.1103/PhysRevLett.75.958
[15] T. Nose and B. Chu, “Static and Dynamical Properties of Polystyrene in Trans-Decalin. 1. NBS 705 Standard Near θ Conditions,” Macromolecules, Vol. 12, No. 4, 1979, pp 590-599. doi:10.1021/ma60070a010
[16] M. Nayeri, M. Zackrisson and J. Bergenholtz, “Scattering Functions of Core-Shell-Structured Hard Spheres with Schulz-Distributed Radii,” The Journal of Physical Chemistry B, Vol. 113, No. 24, 2009, pp. 8296-8302. doi:10.1021/jp811482w
[17] H. Bagger-J?rgensen, L. Coppola, K. Thuresson, U. Olsson and K. Mortensen, “Phase Behavior, Microstructure, and Dynamics in a Nonionic Microemulsion on Addition of Hydrophobically End-Capped Poly (Ethylene Oxide),” Langmuir, Vol. 13, No. 16, 1997, pp. 4204-4218. doi:10.1021/la962054l
[18] E. Feitosa, W. Brown and Per Hansson, “Effect of Temperature on the Interaction between the Nonionic Surfactant C12E5 and Poly (Ethylene Oxide) Investigated by Dynamic Light Scattering and Fluorescence Methods,” Macromolecules, Vol. 29, No. 21, 1996, pp. 6837-6846. doi:10.1021/ma9600771
[19] M. Schwab and B. Stühn, “Relaxation Phenomena and Development of Structure in a Physically Crosslinked Nonionic Microemulsion Studied by Photon Correlation Spectroscopy and Small Angle X-Ray Scattering,” Journal of Chemical Physics, Vol. 112, No. 14, 2000, pp. 6461-6472. doi:10.1063/1.481207
[20] M. Zackrisson, R. Andersson and J. Bergenholtz, “Depletion Interactions in Model Microemulsions,” Langmuir, Vol. 20, No. 8, 2004, pp. 3080-3089. doi:10.1021/la036132y
[21] M. Kotlarchyk, S.-H. Chen, J. S. Huang and M. W. Kim, “Structure of Three-Component Microemulsions in the Critical Region Determined by Small-Angle Neutron Scattering,” Physical Review A, Vol. 29, No. 4, 1984, pp. 2054-2069. doi:10.1103/PhysRevA.29.2054
[22] T. Blochowicz, C. G?gelein, T. Spehr, M. Müller and B. Stühn, “Polymer-Induced Transient Networks in Water-In-Oil Microemulsions Studied by Small-Angle X-Ray and Dynamic Light Scattering,” Physical Review E, Vol. 76, No. 4, 2007, pp. 041505-041514.
[23] J. Bergenholtz, A. Romagnoli and N. J. Wagner, “Viscosity, Microstructure, and Interparticle Potential of AOT/ H2O/n-Decane Inverse Microemulsions,” Langmuir, Vol. 11, No. 5, 1995, pp. 1559-1570.
[24] U. Batra, W. B. Russel and J. S. Huang, “Viscosity Anomaly and Charge Fluctuations in Dilute AOT Microemulsions with X < 20,” Langmuir, Vol. 15, No. 11, 1999, pp. 3718-3725.

Copyright © 2021 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.