Picture of mobile phone running fintech app

Fintech: Open Access research exploring new frontiers in financial technology

Strathprints makes available Open Access scholarly outputs by the Department of Accounting & Finance at Strathclyde. Particular research specialisms include financial risk management and investment strategies.

The Department also hosts the Centre for Financial Regulation and Innovation (CeFRI), demonstrating research expertise in fintech and capital markets. It also aims to provide a strategic link between academia, policy-makers, regulators and other financial industry participants.

Explore all Strathclyde Open Access research...

Transient electric birefringence study of rod-shaped water-in-oil microemulsions

Mantegazza, Francesco and Degiorgio, Vittorio and Giardini, Mario Ettore and Price, A. Louise and Steytler, David C. and Robinson, Brian H. (1998) Transient electric birefringence study of rod-shaped water-in-oil microemulsions. Langmuir, 14. pp. 1-7. ISSN 0743-7463

Full text not available in this repository. Request a copy from the Strathclyde author


Transient electric birefringence (TEB) studies have been carried out on water-in-oil w/o microemulsions stabilized by Ni(AOT)2, the nickel salt of bis(ethylhexyl) sulfosuccinate. The system forms rod-shaped droplets at low water contents which convert to more spherical aggregates as the water content is increased. TEB data have been obtained as a function of microemulsion volume fraction, φ, water content, and temperature. Relaxation transients of the electric birefringence signal were found to be nonexponential, following asymptotically a stretched-exponential behavior. The value of the stretching exponent at low volume fraction is consistent with the assumption that the length probability distribution is exponential. A model describing the Kerr response of the microemulsion droplets is developed. By using this model we derive the specific Kerr constant as a function of the volume fraction, finding a good agreement with the experimentally observed behavior. We also use the model to derive, from the initial slope of the relaxation, the mean rod length Lm. It is found that Lm grows approximately as the square root of φ. Values for Lm obtained from TEB are in good agreement with those obtained from small-angle neutron scattering measurements.