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

Lal, J.; Lurio, L. B.; Liang, D.; Narayanan, S.; Darling, S. B.; Sutton, M.

doi:10.1103/physreve.102.032802

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

Journal Article · Thu Sep 10 00:00:00 EDT 2020 · Physical Review E

DOI:https://doi.org/10.1103/physreve.102.032802· OSTI ID:1768854

Lal, J. ^[1];

^[2];

^[3]; Narayanan, S. ^[3];

^[3]; Sutton, M. ^[4]

Argonne National Lab. (ANL), Argonne, IL (United States); Northern Illinois Univ., DeKalb, IL (United States)
Northern Illinois Univ., DeKalb, IL (United States)
Argonne National Lab. (ANL), Argonne, IL (United States)
McGill Univ., Montreal, QC (Canada)

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.

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Research Organization:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1768854

Journal Information:: Physical Review E, Vol. 102, Issue 3; ISSN 2470-0045

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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