Understanding dynamic heterogeneity from viscosity decoupling: origin, analytical prediction, and artifacts

Molecular level structure and dynamics decide the functionality of a solvent media. One intriguing aspect of such structure and dynamics is the heterogeneity. Generally, dynamic heterogeneity in a media is identified by recognizing the viscosity decoupling of the dynamics (i.e., τ_x ∝(η/T)^p with p≠1). In this talk, a physical understanding of such dynamic heterogeneity will be presented along with the experimental approaches to better correlate viscosity decoupled dynamics and dynamic heterogeneity