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- W2033335607 abstract "Polarized and depolarized spectra from gold (Au) nanoparticles of different sizes are investigated in the small size range, between 3 and 7 nm, using low frequency Raman spectroscopy. Acoustic vibrations of the free-standing Au nanoparticles are demonstrated with frequencies ranging from 5 to 35 cm−1, opening the way to the development of the acoustic resonators. A blue shift in the phonon peaks along with the broadening is observed with a decrease in particle size. Comparison of the measured frequencies with vibrational dynamics calculation and an examination as from the transmission electron microscopy results ascertain that the low frequency phonon modes are due to acoustic phonon quantization. Our results show that the observed low frequency Raman scattering originates from the spherical (l = 0) and quadrupolar (l = 2) vibrations of the spheroidal mode due to plasmon mediated acoustic vibrations in Au nanoparticles." @default.
- W2033335607 created "2016-06-24" @default.
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- W2033335607 date "2013-02-20" @default.
- W2033335607 modified "2023-10-16" @default.
- W2033335607 title "Probing confined acoustic phonons in free standing small gold nanoparticles" @default.
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- W2033335607 doi "https://doi.org/10.1063/1.4792654" @default.
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