Brillouin study of acoustic phonon confinement in Ge O2 nanocubes

Y. Li; H. S. Lim; S. C. Ng; M. H. Kuok; M. Y. Ge; J. Z. Jiang

doi:10.1063/1.2777174

Brillouin study of acoustic phonon confinement in Ge O2 nanocubes

Y. Li
, H. S. Lim
, S. C. Ng
, M. H. Kuok^*
, M. Y. Ge
, J. Z. Jiang

^*此作品的通讯作者

National University of Singapore
Zhejiang University

科研成果: 期刊稿件 › 文章 › 同行评审

11 引用（Scopus）

摘要

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.

源语言	英语
文章编号	093116
期刊	Applied Physics Letters
卷	91
期	9
DOI	https://doi.org/10.1063/1.2777174
出版状态	已出版 - 2007
已对外发布	是

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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.",

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AU - Li, Y.

AU - Lim, H. S.

AU - Ng, S. C.

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AU - Ge, M. Y.

AU - Jiang, J. Z.

PY - 2007

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N2 - 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.

AB - 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.

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DO - 10.1063/1.2777174

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JO - Applied Physics Letters

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Brillouin study of acoustic phonon confinement in Ge O2 nanocubes

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