A new class of tunable hypersonic phononic crystals based on polymer-tethered colloids

The design and engineering of hybrid materials exhibiting tailored phononic band gaps are fundamentally relevant to innovative material technologies in areas ranging from acoustics to thermo-optic devices. Phononic hybridization gaps, originating from the anti-crossing between local resonant and pro...

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Bibliographic Details
Published in:Nature communications 2015-09, Vol.6 (1), p.8309-8309, Article 8309
Main Authors: Alonso-Redondo, E., Schmitt, M., Urbach, Z., Hui, C. M., Sainidou, R., Rembert, P., Matyjaszewski, K., Bockstaller, M. R., Fytas, G.
Format: Article
Language:English
Subjects:
119/118
140/125
639/301/1019/1015
639/301/923/966
639/638/440
639/766/25/3927
acoustics
Chemical Sciences
Condensed Matter
Humanities and Social Sciences
Material chemistry
MATERIALS SCIENCE
metamaterials
multidisciplinary
physical chemistry
Physics
Polymers
Science
science & technology
Science (multidisciplinary)
self-assembly
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Summary:The design and engineering of hybrid materials exhibiting tailored phononic band gaps are fundamentally relevant to innovative material technologies in areas ranging from acoustics to thermo-optic devices. Phononic hybridization gaps, originating from the anti-crossing between local resonant and propagating modes, have attracted particular interest because of their relative robustness to structural disorder and the associated benefit to ‘manufacturability’. Although hybridization gap materials are well known, their economic fabrication and efficient control of the gap frequency have remained elusive because of the limited property variability and expensive fabrication methodologies. Here we report a new strategy to realize hybridization gap materials by harnessing the ‘anisotropic elasticity’ across the particle–polymer interface in densely polymer-tethered colloidal particles. Theoretical and Brillouin scattering analysis confirm both the robustness to disorder and the tunability of the resulting hybridization gap and provide guidelines for the economic synthesis of new materials with deliberately controlled gap position and width frequencies. Hybridization-type band gaps are known to persist in phononic crystals, but their fabrication remains challenging for all-solid hypersonic composites. Here, the authors utilize the elastic anisotropy at the interface of polymer-tethered colloidal particles to control phonon propagation in GHz regime.
ISSN:2041-1723
2041-1723
DOI:10.1038/ncomms9309