Optical properties and coherent vibrational oscillations of gold nanostars
Abbreviated Journal Title
Chem. Phys. Lett.
SURFACE-PLASMON RESONANCE; METAL NANOPARTICLES; SILVER NANOPARTICLES; RELAXATION DYNAMICS; ELECTRONIC RELAXATION; ACOUSTIC VIBRATIONS; LASER; IRRADIATION; PARTICLES; ULTRAFAST; SPECTROSCOPY; Chemistry, Physical; Physics, Atomic, Molecular & Chemical
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.
Chemical Physics Letters
"Optical properties and coherent vibrational oscillations of gold nanostars" (2012). Faculty Bibliography 2010s. 3481.