Title
Optical properties and coherent vibrational oscillations of gold nanostars
Abbreviated Journal Title
Chem. Phys. Lett.
Keywords
SURFACE-PLASMON RESONANCE; METAL NANOPARTICLES; SILVER NANOPARTICLES; RELAXATION DYNAMICS; ELECTRONIC RELAXATION; ACOUSTIC VIBRATIONS; LASER; IRRADIATION; PARTICLES; ULTRAFAST; SPECTROSCOPY; Chemistry, Physical; Physics, Atomic, Molecular & Chemical
Abstract
Hot electron relaxation and coherent vibrational oscillations of gold nanostars ( AuNS) were studied using femtosecond laser spectroscopy. Transient profiles feature a fast decay attributed to electron-phonon interaction and a slower decay due to phonon relaxation. Superimposed on the slow decay are oscillations attributed to coherent vibrations of the AuNS with a period dependent on probe wavelength, due to size variation of the AuNS. In addition, persistent spectral hole-burning studies indicate depletion of AuNS at the excitation wavelength and formation of redder-absorbing AuNS aggregates. In conjunction with experiments, theoretical calculations were carried out to gain insight into the coherent vibrational oscillations. (C) 2012 Elsevier B.V. All rights reserved.
Journal Title
Chemical Physics Letters
Volume
543
Publication Date
1-1-2012
Document Type
Article
Language
English
First Page
127
Last Page
132
WOS Identifier
ISSN
0009-2614
Recommended Citation
"Optical properties and coherent vibrational oscillations of gold nanostars" (2012). Faculty Bibliography 2010s. 3481.
https://stars.library.ucf.edu/facultybib2010/3481
Comments
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