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Authors
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Tommaseo, G. ; Lescanne, M. ; Steffen, W. ; Fytas, G. ; Stamm, M.
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Title
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Elastic Excitations in Polycarbonate Membranes
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Date
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10.11.2004
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Number
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12686
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Abstract
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Brillouin light scattering was used to probe acoustic waves propagating with both longitudinal and transverse polarizations in the surface and the bulk of self-supported particle track-etched polycarbonate membranes with 15- and 80-nm nanopores. The recorded scattering line shape at gigahertz frequencies reveals changes in the surface waves of the membranes which are more pronounced for the 80-nm nanopores despite the low porosity (0.7 and 0.05%). Because the measured elastic constants (1.2 and 6.2 GPa) were found to compare very well with the values for thick polycarbonate film, modifications of the elasto-optical coefficients and/or the transparency might be the reason for the different scattering line shapes. © 2004 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 42: 3311-3317, 2004
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Publisher
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Journal of Polymer Science: Part B: Polymer Physics
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Wikidata
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Citation
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Journal of Polymer Science: Part B: Polymer Physics 42 (2004) 3311-3317
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DOI
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https://doi.org/10.1002/polb.20197
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Tags
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brillouin light scattering polycarbonates membranes mechanical properties diffusion dynamic light scattering brillouin-scattering thin-films acoustic excitations phonons surface diffusion waves modes
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