Low-frequency Raman scattering from nanocrystals caused by coherent excitation of phonons

X. L. Wu; S. J. Xiong; L. T. Sun; J. C. Shen; Paul K. Chu

doi:10.1002/smll.200901579

Low-frequency Raman scattering from nanocrystals caused by coherent excitation of phonons

X. L. Wu
, S. J. Xiong
, L. T. Sun
, J. C. Shen
, Paul K. Chu

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

11 Citations (Scopus)

Abstract

Ultrahigh-resolution transmission electron microscopy clearly reveals the absence of a disordered or softer interface layer between Ge_xSi _1-x nanocrystals (NCs) and the SiO₂ matrix. A theory shows that the collective modes comprising coherent excitation of phonons in a large number of NCs contribute to the Raman scattering. This work provides a new understanding of low-frequency Raman scattering from NC-embedded matrices.

Original language	English
Pages (from-to)	2823-2826
Journal	Small
Volume	5
Issue number	24
DOIs	https://doi.org/10.1002/smll.200901579
Publication status	Published - 18 Dec 2009

Research Keywords

Coherent excitation
Nanocrystals
Raman spectroscopy
Surface vibrations

Access Output

10.1002/smll.200901579

Other Access Options

Check CityUHK Library

Permanent Link

Right click to copy link

Cite this

@article{f2cb1d039d9d4652b5ae58e218c0a714,

title = "Low-frequency Raman scattering from nanocrystals caused by coherent excitation of phonons",

abstract = "Ultrahigh-resolution transmission electron microscopy clearly reveals the absence of a disordered or softer interface layer between GexSi 1-x nanocrystals (NCs) and the SiO2 matrix. A theory shows that the collective modes comprising coherent excitation of phonons in a large number of NCs contribute to the Raman scattering. This work provides a new understanding of low-frequency Raman scattering from NC-embedded matrices.",

keywords = "Coherent excitation, Nanocrystals, Raman spectroscopy, Surface vibrations",

author = "Wu, \{X. L.\} and Xiong, \{S. J.\} and Sun, \{L. T.\} and Shen, \{J. C.\} and Chu, \{Paul K.\}",

year = "2009",

month = dec,

day = "18",

doi = "10.1002/smll.200901579",

language = "English",

volume = "5",

pages = "2823--2826",

journal = "Small",

issn = "1613-6810",

publisher = "Wiley-VCH Verlag GmbH",

number = "24",

}

TY - JOUR

T1 - Low-frequency Raman scattering from nanocrystals caused by coherent excitation of phonons

AU - Wu, X. L.

AU - Xiong, S. J.

AU - Sun, L. T.

AU - Shen, J. C.

AU - Chu, Paul K.

PY - 2009/12/18

Y1 - 2009/12/18

N2 - Ultrahigh-resolution transmission electron microscopy clearly reveals the absence of a disordered or softer interface layer between GexSi 1-x nanocrystals (NCs) and the SiO2 matrix. A theory shows that the collective modes comprising coherent excitation of phonons in a large number of NCs contribute to the Raman scattering. This work provides a new understanding of low-frequency Raman scattering from NC-embedded matrices.

AB - Ultrahigh-resolution transmission electron microscopy clearly reveals the absence of a disordered or softer interface layer between GexSi 1-x nanocrystals (NCs) and the SiO2 matrix. A theory shows that the collective modes comprising coherent excitation of phonons in a large number of NCs contribute to the Raman scattering. This work provides a new understanding of low-frequency Raman scattering from NC-embedded matrices.

KW - Coherent excitation

KW - Nanocrystals

KW - Raman spectroscopy

KW - Surface vibrations

UR - https://www.scopus.com/pages/publications/73949128548

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-73949128548&origin=recordpage

U2 - 10.1002/smll.200901579

DO - 10.1002/smll.200901579

M3 - RGC 21 - Publication in refereed journal

C2 - 19882689

SN - 1613-6810

VL - 5

SP - 2823

EP - 2826

JO - Small

JF - Small

IS - 24

ER -

Low-frequency Raman scattering from nanocrystals caused by coherent excitation of phonons

Abstract

Research Keywords

Access Output

Other Access Options

Permanent Link

Other Files and Links

Fingerprint

Cite this