Dewetting in immiscible polymer bilayer films

Lal, J.; Malkova, S.; Mukhopadhyay, M. K.; Narayanan, S.; Fluerasu, A.; Darling, S. B.; Lurio, L. B.; Sutton, M.

doi:10.1103/PhysRevMaterials.1.015601

Dewetting in immiscible polymer bilayer films

Journal Article · Mon Jun 19 00:00:00 EDT 2017 · Physical Review Materials

DOI:https://doi.org/10.1103/PhysRevMaterials.1.015601· OSTI ID:1433057

Lal, J. ^[1]; Malkova, S. ^[2]; Mukhopadhyay, M. K. ^[3]; Narayanan, S. ^[4]; Fluerasu, A. ^[5]; Darling, S. B. ^[6]; Lurio, L. B. ^[7]; Sutton, M. ^[8]

Argonne National Lab. (ANL), Argonne, IL (United States). X-ray Science Division, and Intense Pulsed Neutron Source; Northern Illinois Univ., DeKalb, IL (United States). Dept. of Physics
Argonne National Lab. (ANL), Argonne, IL (United States). Intense Pulsed Neutron Source
Univ. of California, San Diego, CA (United States). Dept. of Physics
Argonne National Lab. (ANL), Argonne, IL (United States). X-ray Science Division
Brookhaven National Lab. (BNL), Upton, NY (United States). NSLS-II
Argonne National Lab. (ANL), Argonne, IL (United States). Nanoscience and Technology Division
Northern Illinois Univ., DeKalb, IL (United States). Dept. of Physics
McGill Univ., Montreal, QC (Canada). Dept of Physics

We have measured in situ the progression of dewetting from a large number of holes in immiscible polymer bilayer films. Using x-ray photon correlation spectroscopy (XPCS) in grazing incidence we probe independently the evolving dewetting process both at the top surface and the buried interface of the bilayer. At an early stage, differences in the evolution of the velocities measured by XPCS between the surface and buried interface indicate that the holes do not penetrate the bottom layer. The rim velocity at late stages decays according to a wave-vector-dependent power law, which indicates inhomogeneous flows in the film. The changes in the static scattering show that observed slow-down of the dewetting velocity is correlated with the changing roughness at the buried interface of the polymer bilayer.

View Accepted Manuscript (DOE)

Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: AC02-06CH11357; SC0012704

OSTI ID:: 1433057

Alternate ID(s):: OSTI ID: 1433945
OSTI ID: 1364220

Report Number(s):: BNL--203454-2018-JAAM; 127301

Journal Information:: Physical Review Materials, Journal Name: Physical Review Materials Journal Issue: 1 Vol. 1; ISSN PRMHAR; ISSN 2475-9953

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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