Title :

Tunable Hypersonic Bandgap Formation in Anisotropic Crystals of Dumbbell Nanoparticles

Author(s) :

Kim, Hojin [Auteur]
Department of Mathematical Sciences, KAIST
Gueddida, Abdellatif [Auteur]
Physique - IEMN [PHYSIQUE - IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Wang, Zuyuan [Auteur]
Max Planck Institute for Polymer Research
Djafari-Rouhani, Bahram [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Physique - IEMN [PHYSIQUE - IEMN]
Fytas, George [Auteur]
Max Planck Institute for Polymer Research
Furst, Eric [Auteur]
University of Delaware [Newark]

Journal title :

ACS Nano

Pages :

19224-19231

Publisher :

American Chemical Society

Publication date :

2023-10-10

ISSN :

1936-0851

English keyword(s) :

Directed self-assembly
Anisotropic crystal
Phononic material
s Brillouin light scattering
Metamaterials

HAL domain(s) :

Physique [physics]
Sciences de l'ingénieur [physics]

English abstract : [en]

Phononic materials exhibit mechanical properties that alter the propagation of acoustic waves and are widely useful for metamaterials. To fabricate acoustic materials with phononic bandgaps, colloidal nanoparticles and ...
Show more >Phononic materials exhibit mechanical properties that alter the propagation of acoustic waves and are widely useful for metamaterials. To fabricate acoustic materials with phononic bandgaps, colloidal nanoparticles and their assemblies allow access to various crystallinities in the submicrometer scale. We fabricated anisotropic crystals with dumbbell-shaped nanoparticles via field-directed self-assembly. Brillouin light spectroscopy detected the formation of direction-dependent hypersonic phononic bandgaps that scale with the lattice parameters. In addition, the local resonances of the constituent nanoparticles enable metamaterial behavior by opening hybridization gaps in disordered structures. Unexpectedly, this bandgap frequency is robust to changes in the dumbbell aspect ratio. Overall, this study provides a structure–property relationship for designing anisotropic phononic materials with targeted phononic bandgaps.Show less >

Language :

Anglais

Popular science :

Non

European Project :

Small - and nano - scale soft phononics

Collections :

• Institut d'Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520

Source :

Harvested from HAL