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
Recommended Citation
Lal, J.; Lurio, L. B.; Liang, D.; Narayanan, S.; Darling, S. B.; and Sutton, M., "Universal dynamics of coarsening during polymer-polymer thin-film spinodal dewetting kinetics" (2020). NIU Bibliography. 560.
https://huskiecommons.lib.niu.edu/niubib/560
Department
Department of Physics
