Ultrafast spectroscopy studies on thickness dependence of acoustic phonon modes in silver nanoprisms
Resource
Journal of the Chinese Chemical Society 55 (1): 23-28
Journal
Journal of the Chinese Chemical Society
Journal Volume
55
Pages
23-28
Date Issued
2008
Author(s)
Abstract
Abstract Time‐resolved transient absorption technique is used to investigate the thickness dependence of acoustic phonon modes of silver nanoprisms with two thicknesses, 7.8 ± 1.2 and 8.5 ± 0.69 nm, and a similar bisector length of 31.4 ∼ 31.6 nm. Coherent acoustic phonon signals are observed. A new acoustic phonon frequency within 7.81 cm −1 ∼ 11.7 cm −1 is found and this phonon mode is associated with the thickness of the nanoprism. Another phonon frequency between 1.95 cm −1 and 1.71 cm −1 is also observed, and its origin can be associated with the bisector length of the nanoprism.
Type
journal article
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