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APS » Journals » Phys. Rev. Lett. » Volume 98 » Issue 22
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Phys. Rev. Lett. 98, 227801 (2007) [4 pages]

Evidence for Viscoelastic Effects in Surface Capillary Waves of Molten Polymer Films

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Zhang Jiang1, Hyunjung Kim2, X. Jiao3, H. Lee2, Y.-J. Lee2, Y. Byun2, S. Song2, D. Eom2, C. Li4, M. H. Rafailovich4, L. B. Lurio3, and S. K. Sinha1,5
1Department of Physics, University of California at San Diego, La Jolla, California 92093, USA
2Department of Physics and Interdisciplinary Program of Integrated Biotechnology, Sogang University, Seoul 121-742, Korea
3Department of Physics, Northern Illinois University, DeKalb, Illinois 60115, USA
4Department of Materials Science and Engineering, SUNY at Stony Brook, New York 11794, USA
5LANSCE, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA

Received 11 January 2007; published 30 May 2007

The surface dynamics of supported ultrathin polystyrene films with thickness comparable to the radius of gyration were investigated by surface sensitive x-ray photon correlation spectroscopy. We show for the first time that the conventional model of capillary waves on a viscous liquid has to be modified to include the effects of a shear modulus in order to explain both static and dynamic scattering data from ultrathin molten polymer films.

© 2007 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.98.227801
DOI:
10.1103/PhysRevLett.98.227801
PACS:
61.25.Hq, 61.10.Kw, 68.03.Kn, 68.15.+e
 
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