Title

Universal dynamics of coarsening during polymer-polymer thin-film spinodal dewetting kinetics

Author ORCID Identifier

Ryan Lewis:https://orcid.org/0000-0002-3000-2811

Publication Title

Physical Review E

ISSN

24700045

E-ISSN

24700053

Document Type

Article

Abstract

The dewetting dynamics of a supported bilayer polymer thin film on a solid substrate is investigated using grazing incidence x-ray photon correlation spectroscopy. We find that the top layer dewets via the spinodal mechanism. The kinetics of the dewetting is studied by monitoring the time evolution of the surface diffuse x-ray scattering intensity. We study the time evolution of fluctuations about the average surface structure by measuring the two-time x-ray intensity fluctuation correlation functions. Using these two-time correlation functions we quantify the crossover from early-time diffusive dynamics to hydrodynamics. The early diffusive regime satisfies dynamic universality. The two-time correlation functions also quantify the onset of hydrodynamic effects. The hydrodynamic regime is observed during the spinodal dewetting process as these interactions are not screened.

Publication Date

9-10-2020

DOI

10.1103/PhysRevE.102.032802

PubMed ID

33076025

Department

Department of Physics

COinS