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Title: Dewetting in immiscible polymer bilayer films

Authors:
; ; ; ; ; ; ;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1364220
Grant/Contract Number:
AC02-06CH11357
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physical Review Materials
Additional Journal Information:
Journal Volume: 1; Journal Issue: 1; Related Information: CHORUS Timestamp: 2017-06-19 22:11:32; Journal ID: ISSN 2475-9953
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English

Citation Formats

Lal, J., Malkova, S., Mukhopadhyay, M. K., Narayanan, S., Fluerasu, A., Darling, S. B., Lurio, L. B., and Sutton, M. Dewetting in immiscible polymer bilayer films. United States: N. p., 2017. Web. doi:10.1103/PhysRevMaterials.1.015601.
Lal, J., Malkova, S., Mukhopadhyay, M. K., Narayanan, S., Fluerasu, A., Darling, S. B., Lurio, L. B., & Sutton, M. Dewetting in immiscible polymer bilayer films. United States. doi:10.1103/PhysRevMaterials.1.015601.
Lal, J., Malkova, S., Mukhopadhyay, M. K., Narayanan, S., Fluerasu, A., Darling, S. B., Lurio, L. B., and Sutton, M. 2017. "Dewetting in immiscible polymer bilayer films". United States. doi:10.1103/PhysRevMaterials.1.015601.
@article{osti_1364220,
title = {Dewetting in immiscible polymer bilayer films},
author = {Lal, J. and Malkova, S. and Mukhopadhyay, M. K. and Narayanan, S. and Fluerasu, A. and Darling, S. B. and Lurio, L. B. and Sutton, M.},
abstractNote = {},
doi = {10.1103/PhysRevMaterials.1.015601},
journal = {Physical Review Materials},
number = 1,
volume = 1,
place = {United States},
year = 2017,
month = 6
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on June 19, 2018
Publisher's Accepted Manuscript

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  • We have monitored the progression of the dewetting of a partially brominated polystyrene (PBrS) thin film on top of a polystyrene (PS) thin film with scanning transmission x-ray microscopy (STXM) as well as photoemission electron microscopy (PEEM). We mapped the projected thickness of each constituent polymer species and the total thickness of the film with STXM, while we determined the surface composition with PEEM. Our data show that the PBrS top layer becomes encapsulated during the later stages of dewetting and that atomic force microscopy topographs cannot be utilized to determine the contact angle between PBrS and PS. {copyright} {italmore » 1998 American Institute of Physics.}« less
  • No abstract prepared.
  • Self-assembly of ultrathin Au, W, and Au-W bilayer thin films is investigated using a rapid thermal annealing technique in an inert ambient. The solid-state dewetting of Au films is briefly revisited in order to emphasize the role of initial film thickness. W films deposited onto SiO{sub 2} evolve into needle-like nanocrystals rather than forming particle-like agglomerates upon annealing at elevated temperatures. Transmission electron microscopy reveals that such nanocrystals actually consist of tungsten (VI) oxide (WO{sub 3}) which is related to an anisotropic oxide crystal growth out of the thin film. The evolution of W films is highly sensitive to themore » presence of any residual oxygen. Combination of both the dewetting of Au and the oxide crystal growth of WO{sub 3} is realized by using various bilayer film configurations of the immiscible Au and W. At low temperature, Au dewetting is initiated while oxide crystal growth is still suppressed. Depending on the stacking sequence of the Au-W bilayer thin film, W acts either as a substrate or as a passivation layer for the dewetting of Au. Being the ground layer, W changes the wettability of Au which clearly modifies its initial state for the dewetting. Being the top layer, W prevents Au from dewetting regardless of Au film thickness. Moreover, regular pattern formation of Au-WO{sub 3} nanoparticles is observed at high temperature demonstrating how bilayer thin film dewetting can create unique nanostructure arrangements.« less
  • No abstract prepared.