Please use this identifier to cite or link to this item: https://doi.org/10.1063/1.2777174
Title: Brillouin study of acoustic phonon confinement in Ge O2 nanocubes
Authors: Li, Y. 
Lim, H.S. 
Ng, S.C. 
Kuok, M.H. 
Ge, M.Y.
Jiang, J.Z.
Issue Date: 2007
Citation: Li, Y., Lim, H.S., Ng, S.C., Kuok, M.H., Ge, M.Y., Jiang, J.Z. (2007). Brillouin study of acoustic phonon confinement in Ge O2 nanocubes. Applied Physics Letters 91 (9) : -. ScholarBank@NUS Repository. https://doi.org/10.1063/1.2777174
Abstract: Brillouin light scattering from several aggregates of monodisperse Ge O2 nanocubes has been measured. Six well-resolved spectral peaks are observed whose frequencies scale as 1L, where L is the cube edge length. A finite element analysis of the eigenvibrations of a free nanocube reveals that the peaks are due to acoustic phonon confinement. Simulations show that the lowest-energy mode has a predominantly torsionallike character. The elastic constants of the nanocubes are found to be much lower than those of bulk Ge O2. © 2007 American Institute of Physics.
Source Title: Applied Physics Letters
URI: http://scholarbank.nus.edu.sg/handle/10635/64819
ISSN: 00036951
DOI: 10.1063/1.2777174
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