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|Title:||Confined acoustic modes in nanoparticles||Authors:||Li, Y.
|Issue Date:||2005||Citation:||Li, Y., Lim, H.S., Wang, Z.K., Ng, S.C., Kuok, M.H. (2005). Confined acoustic modes in nanoparticles. Journal De Physique. IV : JP 129 : 51-54. ScholarBank@NUS Repository. https://doi.org/10.1051/jp4:2005129011||Abstract:||Brillouin scattering from aggregates of monodisperse polystyrene spheres has been measured as a function of their diameters (20 - 990nm). In this range of sphere sizes studied, confined acoustic modes and two types of bulk longitudinal acoustic modes are observed. One type exists within larger spheres (diameter > 700 nm), while the other propagates in aggregates of smaller spheres (diameter ≤ 80 nm) which are considered as polystyrene-air composites. The frequencies of the confined acoustic modes are found to be proportional to inverse sphere diameter, in accordance with Lamb's theory. © EDP Sciences.||Source Title:||Journal De Physique. IV : JP||URI:||http://scholarbank.nus.edu.sg/handle/10635/98661||ISSN:||11554339||DOI:||10.1051/jp4:2005129011|
|Appears in Collections:||Staff Publications|
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