Brillouin light scattering ( BLS ) can record particle resonances, which allow access to thermomechanical properties on a submicrometer scale. The full theoretical representation of BLS eigenmode spectra of polymer and silica colloids resolves a longstanding discussion showing that both even and odd l spheroidal modes are active. The BLS spectra of transparent silica suspensions fully support the predicted dependence of the strength of the individual resonance modes on the probing wavevector. It is this dependence that selects which spheroidal modes will be revealed experimentally.
Eigenvibrations of Submicrometer Colloidal Spheres
Mattarelli, Maurizio;
2010
Abstract
Brillouin light scattering ( BLS ) can record particle resonances, which allow access to thermomechanical properties on a submicrometer scale. The full theoretical representation of BLS eigenmode spectra of polymer and silica colloids resolves a longstanding discussion showing that both even and odd l spheroidal modes are active. The BLS spectra of transparent silica suspensions fully support the predicted dependence of the strength of the individual resonance modes on the probing wavevector. It is this dependence that selects which spheroidal modes will be revealed experimentally.File in questo prodotto:
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