Tuning and Switching the Hypersonic Phononic Properties of Elastic Impedance Contrast Nanocomposites
| Autor(en): | Sato, Akihiro Pennec, Yan Shingne, Nitin Thurn-Albrecht, Thomas Knoll, Wolfgang Steinhart, Martin Djafari-Rouhani, Bahram Fytas, George |
Stichwörter: | Brillouin light scattering; Chemistry; Chemistry, Multidisciplinary; Chemistry, Physical; CRYSTALS; DYNAMICS; FILMS; Materials Science; Materials Science, Multidisciplinary; mechanical properties; nanocomposites; Nanoscience & Nanotechnology; ORGANIZATION; phononic dispersion relations; POLY(DIMETHYLSILOXANE); POLY(VINYLIDENE FLUORIDE); POLYDIMETHYLSILOXANE; POLYMER; POROUS ALUMINA; Science & Technology - Other Topics; WALLS | Erscheinungsdatum: | 2010 | Herausgeber: | AMER CHEMICAL SOC | Journal: | ACS NANO | Volumen: | 4 | Ausgabe: | 6 | Startseite: | 3471 | Seitenende: | 3481 | Zusammenfassung: | Anodic aluminum oxide (AAO) containing arrays of aligned cylindrical nanopores infiltrated with polymers is a well-defined model system for the study of hypersound propagation in polymer nanocomposites. Hypersonic phononic properties of AAO/polymer nanocomposites such as phonon localization and anisotropic sound propagation can be tailored by adjusting elastic contrast and density contrast between the components. Changes in density and elastic properties of the component located in the nanopores induced by phase transitions allow reversible modification of the phononic band structure and mode switching. As example in case, the crystallization and melting of poly(vinylidene difluoride) inside AAO was investigated. |
ISSN: | 19360851 | DOI: | 10.1021/nn100519h |
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geprüft am 09.05.2024
