| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials Processing Fundamentals
|
| Presentation Title |
Modified Gouy-Chapman-Stern Model of the Aqueous Na-AOT Reverse Micelle Sub-structure with the Addition of Salts |
| Author(s) |
Robyn E. Ridley, James P. Kelly, Hoorshad Fathi-Kelly, Victor R. Vasquez, Olivia A. Graeve |
| On-Site Speaker (Planned) |
Robyn E. Ridley |
| Abstract Scope |
Aqueous Na-AOT reverse micelles used for nanoparticle synthesis processes have been shown to decrease in size with increased concentration and/or valency of additional salts until reaching a point of destabilization. Dynamic light scattering experiments and molecular dynamics simulations demonstrate a relationship between average reverse micelle size and the Debye screening length, and thus indicate that electrical double layer (EDL) theory for electrolytes near a charged surface is applicable to these systems. The reverse micelle internal substructure can be described by considering the surfactant layer as a charged surface and non-dissociated headgroup ions as a Stern layer. However, current models for EDL theory use assumptions of planar charged surfaces and infinite distance and thus cannot be directly applied to reverse micelles. As such, we modify the Gouy-Chapman-Stern model to account for curvature and confinement effects to analyze the behavior of reverse micelles with the addition of salts. |
| Proceedings Inclusion? |
Planned: |