Nano Letters, volume 11, issue 7, pages 2786-2790
Far-Infrared Absorption of PbSe Nanorods
Byung-Ryool Hyun
1, 2
,
A. C. Bartnik
1, 2
,
W.-K. Koh
1, 2
,
N. I. Agladze
1, 2
,
J. P. Wrubel
1, 2
,
A. Sievers
1, 2
,
Christopher B. Murray
1, 2
,
Frank Wise Frank Wise
1, 2
Publication type: Journal Article
Publication date: 2011-05-31
Journal:
Nano Letters
scimago Q1
SJR: 3.411
CiteScore: 16.8
Impact factor: 9.6
ISSN: 15306984, 15306992
PubMed ID:
21627094
General Chemistry
Condensed Matter Physics
General Materials Science
Mechanical Engineering
Bioengineering
Abstract
Measurements of the far-infrared absorption spectra of PbSe nanocrystals and nanorods are presented. As the aspect ratio of the nanorods increases, the Fröhlich sphere resonance splits into two peaks. We analyze this splitting with a classical electrostatic model, which is based on the dielectric function of bulk PbSe but without any free-carrier contribution. Good agreement between the measured and calculated spectra indicates that resonances in the local field factors underlie the measured spectra.
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