@article{ wang_confined_2009,
  title = {Confined Crystallization of Polyethylene Oxide in Nanolayer Assemblies},
  volume = {323},
  issn = {0036-8075},
  shorttitle = {Confined Crystallization of Polyethylene Oxide in Nanolayer Assemblies},
  url = {://WOS:000263066800039},
  doi = {10.1126/science.1164601},
  abstract = {The design and fabrication of ultrathin polymer layers are of increasing importance because of the rapid development of nanoscience and nanotechnology. Confined, two- dimensional crystallization of polymers presents challenges and opportunities due to the long- chain, covalently bonded nature of the macromolecule. Using an innovative layer- multiplying coextrusion process to obtain assemblies with thousands of polymer nanolayers, we discovered a morphology that emerges as confined polyethylene oxide ( {PEO}) layers are made progressively thinner. When the thickness is confined to 20 nanometers, the {PEO} crystallizes as single, high- aspect- ratio lamellae that resemble single crystals. Unexpectedly, the crystallization habit imparts two orders of magnitude reduction in the gas permeability.},
  language = {English},
  number = {5915},
  journal = {Science},
  author = {Wang, H. P. and Keum, J. K. and Hiltner, A. and Baer, E. and Freeman, B. and Rozanski, A. and Galeski, A.},
  month = {February},
  year = {2009},
  pages = {757--760}
}

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