Acoustic vibrations of embedded spherical nanoparticles |
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Authors: | Daniel B. Murray Lucien Saviot |
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Affiliation: | aDepartment of Physics and Astronomy, Okanagan University College, Kelowna, British Columbia, Canada V1V 1V7;bLaboratoire de Recherche sur la Réactivité des Solides, UMR 5613 CNRS—Université de Bourgogne, Dijon, France |
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Abstract: | A solid-matrix-embedded spherical nanoparticle has acoustic vibrational frequencies which are shifted and damped relative to modes of a free sphere. Not only the longitudinal plane wave acoustic impedances, but also the Poisson ratios of nanoparticle and matrix are important in determining the Q-factor of the “breathing” mode, for which frequencies and Q-factors with different material combinations are presented. High matrix sound speed (e.g. silica, titania, alumina, diamond) increases Q. |
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Keywords: | Nanoparticles Phonons Matrix Raman scattering |
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