Elastic excitations in polycarbonate membranes
| Autor: | Manfred Stamm, G. Tommaseo, Werner Steffen, M. Lescanne, George Fytas |
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| Rok vydání: | 2004 |
| Předmět: |
Materials science
Polymers and Plastics Condensed matter physics Scattering business.industry Acoustic wave Condensed Matter Physics Light scattering Brillouin zone Membrane Optics Dynamic light scattering Surface wave visual_art Materials Chemistry visual_art.visual_art_medium Physical and Theoretical Chemistry Polycarbonate business |
| Zdroj: | Journal of Polymer Science Part B: Polymer Physics. 42:3311-3317 |
| ISSN: | 1099-0488 0887-6266 |
| DOI: | 10.1002/polb.20197 |
| Popis: | 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 |
| Databáze: | OpenAIRE |
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