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Plasmon coupling and coherent acoustic phonon dynamics of periodic gold pair nanocuboids by near-IR transient absorption spectroscopy

Paper ID Volume ID Publish Year Pages File Format Full-Text
26721 43973 2011 5 PDF Available
Title
Plasmon coupling and coherent acoustic phonon dynamics of periodic gold pair nanocuboids by near-IR transient absorption spectroscopy
Abstract

Gold pair nanocuboids (size: 150 nm × 150 nm × 20 nm) with different nanogaps ranging from 0 to 10.6 nm were prepared by the electron-beam lithography. Effect of plasmon coupling on coherent acoustic phonon dynamics of gold pair nanocuboids was examined as a function of nanogaps by near-IR transient absorption spectroscopy at 400-nm excitation. The similar oscillation periods of coherent acoustic phonon vibration (88 ± 1 ps) were observed for all the gold pair nanocubiods irrespective of the nanogaps, which was analyzed by the oscillation of bleaching peaks of SPR bands and the transient absorption dynamics. The coherent acoustic phonon vibration of gold nanocuboids was only influenced by the nanostructure itself, even though SPR band was much influenced due to the dipole coupling between the adjacent Au nanocuboids. In addition, it was revealed that the electron–phonon coupling (∼0.7 ps) was followed by the initial size change of gold nanocuboid with the time scale that was a little slower (∼1.7 ps) than the electron–phonon coupling.

Graphical abstractThe coherent acoustic phonon vibration of Au nanocuboid was not influenced by the plasmon coupling between the adjacent Au nanocuboids, even though SPR band was affected by the dipole coupling. In addition, the electron–phonon coupling (∼0.7 ps) was followed by the initial size change of gold nanocuboid with the time scale (∼1.7 ps) slower than the electron–phonon coupling.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Plasmon coupling; Coherent acoustic phonon; Gold nanocuboid; Near-IR transient absorption spectroscopy
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Plasmon coupling and coherent acoustic phonon dynamics of periodic gold pair nanocuboids by near-IR transient absorption spectroscopy
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 221, Issues 2–3, 25 June 2011, Pages 164–168
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us