6533b836fe1ef96bd12a154a
RESEARCH PRODUCT
Damping by Bulk and Shear Viscosity of Confined Acoustic Phonons for Nanostructures in Aqueous Solution
Saviot LucienCaleb H. NettingDaniel B. Murraysubject
Materials scienceAqueous solutionIntrinsic viscosityIsotropy[ PHYS.COND.CM-MS ] Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]02 engineering and technologyVolume viscosity021001 nanoscience & nanotechnology01 natural sciencesViscoelasticitySurfaces Coatings and FilmsPhysics::Fluid DynamicsViscosityChemical physics0103 physical sciences[PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]Materials ChemistryCompressibilityNewtonian fluidPhysical and Theoretical Chemistry010306 general physics0210 nano-technologydescription
International audience; A nanoparticle in aqueous solution is modeled as a homogeneous elastic isotropic continuum sphere in contact with an infinite viscous compressible Newtonian fluid. The frequencies and damping of the confined vibrational modes of the sphere are calculated for the material parameters of a CdSe nanoparticle in water and a poly(methyl methacrylate) nanosphere in water. Although the effects of viscosity are found to be negligible for macroscopic objects, for nanoscale objects, both the frequency and damping of the vibrational modes are significantly affected by the viscosity of the liquid. Furthermore, both shear viscosity and bulk viscosity play an important role. A model of the spherical satellite tobacco mosaic virus consisting of outer solid layers with a water core is also investigated, and the viscosity of the water core is found to significantly damp the free vibrational modes. The same approach can be applied for nonspherical geometries and also to viscoelastic nanoparticles.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2007-06-28 | The Journal of Physical Chemistry B |