Low frequency Raman scattering from confined acoustic phonons in freestanding silver nanoparticles

被引：16

作者：

Mankad, Venu ^{[1
]}

Mishra, K. K. ^{[2
]}

Gupta, Sanjeev K. ^{[1
]}

Ravindran, T. R. ^{[2
]}

Jha, Prafulla K. ^{[1
]}

机构：

[1] Bhavnagar Univ, Dept Phys, Bhavnagar 364001, Gujarat, India

[2] Indira Gandhi Ctr Atom Res, Condensed Matter Phys Div, Kalpakkam 603102, Tamil Nadu, India

来源：

VIBRATIONAL SPECTROSCOPY | 2012年 / 61卷

关键词：

Silver nanoparticles; Low frequency Raman spectra; Surface plasmon-vibration coupling mechanism; METAL NANOPARTICLES; VIBRATIONAL-MODES; NANOCRYSTALS; EXCITATION; PARTICLES; DYNAMICS; PLASMONS; CLUSTERS; HEAT;

D O I：

10.1016/j.vibspec.2012.02.004

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

We report here the observation of the low frequency Raman scattering (LFRS) from acoustic phonons in freestanding silver. Silver nanoparticles (size around 3-4 nm) of spherical shape have been synthesized using a solid-state route. A blue shift along with broadening of the band is observed with a decrease in particle size. Size dependence of acoustic phonon in silver nanoparticles is explained using Lamb's theory. Our results show that the observed LFRS originates from different spheroidal modes due to the confinement of acoustic vibrations in Ag nanoparticles. Size distribution is obtained from LFRS and compared with TEM. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：183 / 187

页数：5

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