|About this Abstract
||Materials Science & Technology 2012
||Controlled Synthesis, Processing, and Applications of Structural and Functional Nanomaterials
||Development of a Model of Reverse Micelle Size with Electrolyte Additions
||Hoorshad Fathi, James P. Kelly, Victor R. Vasquez, Olivia A. Graeve
|On-Site Speaker (Planned)
We present a fundamental study of reverse micelle behavior with respect to the addition of electrolytes. Using dynamic light scattering, we find that salt additions result in a decrease in reverse micelle size, which causes destabilization at a critical concentration. A model based on the electrical double layer explains this behavior. By relating the destabilization concentration to the valence of the electrolyte cation, the minimum in the magnitude of the potential and the local concentration generating this potential can be quantitatively determined. Also, the surface charge density of the charged surfactant film can be estimated. Combining the surface charge density and the critical potential, we evaluate the validity of the model and discuss the implications. Molecular dynamic simulations are also described for further evaluation of the model. This study has important implications in the use of reverse micelle synthesis for the preparation of a variety of nanoparticles and nanowires.