Tuning and switching hypersonic phononic properties of impedance contrast nanocomposites

Anodic aluminium oxide (AAO) containing arrays of aligned cylindrical nanopores infil-trated 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. Reversible 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.


Published in:
ACS Nano, 4, 6, 3471-3481
Year:
2010
Publisher:
American Chemical Society
ISSN:
1936-0851
Keywords:
Laboratories:




 Record created 2010-02-25, last modified 2018-09-13


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