6533b854fe1ef96bd12ae214
RESEARCH PRODUCT
Acoustic vibrations of anisotropic nanoparticles
Daniel B. MurraySaviot Luciensubject
Materials scienceCondensed Matter - Mesoscale and Nanoscale PhysicsIsotropyFOS: Physical sciencesNanoparticleAnisotropic nanoparticles02 engineering and technology[ PHYS.COND.CM-GEN ] Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other]021001 nanoscience & nanotechnologyCondensed Matter Physics01 natural sciencesElectronic Optical and Magnetic MaterialsVibrationTetragonal crystal systemClassical mechanics[PHYS.COND.CM-GEN]Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other]Irreducible representationMesoscale and Nanoscale Physics (cond-mat.mes-hall)0103 physical sciencesHomogeneous spaceElasticity (economics)010306 general physics0210 nano-technologydescription
Acoustic vibrations of nanoparticles made of materials with anisotropic elasticity and nanoparticles with non-spherical shapes are theoretically investigated using a homogeneous continuum model. Cubic, hexagonal and tetragonal symmetries of the elasticity are discussed, as are spheroidal, cuboctahedral and truncated cuboctahedral shapes. Tools are described to classify the different vibrations and for example help identify the modes having a significant low-frequency Raman scattering cross-section. Continuous evolutions of the modes starting from those of an isotropic sphere coupled with the determination of the irreducible representation of the branches permit some qualitative statements to be made about the nature of various modes. For spherical nanoparticles, a more accurate picture is obtained through projections onto the vibrations of an isotropic sphere.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2009-01-01 |