New explanation of Raman peak redshift in nanoparticles

被引：29

作者：

Meilakhs, A. P. ^{[1
]}

Koniakhin, S. V. ^{[1
,2
]}

机构：

[1] Russian Acad Sci, Ioffe Phys Tech Inst, St Petersburg 194021, Russia

[2] Univ Russian Acad Sci, St Petersburg 194021, Russia

来源：

SUPERLATTICES AND MICROSTRUCTURES | 2017年 / 110卷

基金：

俄罗斯科学基金会;

关键词：

Nanoparticles; Raman scattering; Phonon confinement; SI NANOCRYSTALS; GERMANIUM; DIAMOND; CLUSTERS; SILICON; SPECTRA;

D O I：

10.1016/j.spmi.2017.08.010

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

In this letter, we propose a new model that explains the Raman peak downshift observed in nanoparticles with respect to bulk materials. The proposed model takes into account discreteness of the vibrational spectra of nanoparticles. For crystals with a cubic lattice (Diamond, Silicon, Germanium) we give a relation between the displacement of Raman peak position and the size of nanoparticles. The proposed model does not include any uncertain parameters, unlike the conventionally used phonon confinement model (PCM), and can be employed for unambiguous nanoparticles size estimation. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：319 / 323

页数：5

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