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

^*Corresponding author for this work

National University of Singapore
Zhejiang University

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

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.

Original language	English
Article number	093116
Journal	Applied Physics Letters
Volume	91
Issue number	9
DOIs	https://doi.org/10.1063/1.2777174
State	Published - 2007
Externally published	Yes

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title = "Brillouin study of acoustic phonon confinement in Ge O2 nanocubes",

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.

AU - Kuok, M. H.

AU - Ge, M. Y.

AU - Jiang, J. Z.

PY - 2007

Y1 - 2007

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.

UR - https://www.scopus.com/pages/publications/34548414556

U2 - 10.1063/1.2777174

DO - 10.1063/1.2777174

M3 - 文章

AN - SCOPUS:34548414556

SN - 0003-6951

VL - 91

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 9

M1 - 093116

ER -

Brillouin study of acoustic phonon confinement in Ge O2 nanocubes

Abstract

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