Direct observation of low frequency confined acoustic phonons in silver nanoparticles: terahertz time domain spectroscopy

Kumar, Sunil ; Kamaraju, N. ; Karthikeyan, B. ; Tondusson, M. ; Freysz, E. ; Sood, A. K. (2010) Direct observation of low frequency confined acoustic phonons in silver nanoparticles: terahertz time domain spectroscopy The Journal of Chemical Physics, 133 (1). 014502_1-014502_4. ISSN 0021-9606

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Official URL: http://link.aip.org/link/?JCPSA6/133/014502/1

Related URL: http://dx.doi.org/10.1063/1.3456372

Abstract

Terahertz time domain spectroscopy has been used to study low frequency confined acoustic phonons of silver nanoparticles embedded in poly(vinyl alcohol) matrix in the spectral range of 0.1-2.5 THz. The real and imaginary parts of the dielectric function show two bands at 0.60 and 2.12 THz attributed to the spheroidal and toroidal modes of silver nanoparticles, thus demonstrating the usefulness of terahertz time domain spectroscopy as a complementary technique to Raman spectroscopy in characterizing the nanoparticles.

Item Type:Article
Source:Copyright of this article belongs to American Institute of Physics.
Keywords:Dielectric Function; Nanoparticles; Phonons; Silver; Terahertz Spectroscopy
ID Code:79899
Deposited On:30 Jan 2012 05:05
Last Modified:18 May 2016 22:06

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