Size dependence of the energy relaxation in silver nanoparticles embedded in dielectric matrices

Size dependence of the energy relaxation in silver nanoparticles embedded in dielectric matrices

The electron dynamics is studied in silver nanoparticles of different sizes embedded either in a silicate glass or in a porous alumina matrix, using time-resolved optical spectroscopy. The femtosecond pump–probe measurements, made under various conditions of excitation, reveal that the energy relaxa...

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Veröffentlicht in:Applied physics letters 1999-12, Vol.75 (24), p.3799-3801
Hauptverfasser: Halté, V., Bigot, J.-Y., Palpant, B., Broyer, M., Prével, B., Pérez, A.
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container_end_page 3801
container_issue 24
container_start_page 3799
container_title Applied physics letters
container_volume 75
creator Halté, V.
Bigot, J.-Y.
Palpant, B.
Broyer, M.
Prével, B.
Pérez, A.
description The electron dynamics is studied in silver nanoparticles of different sizes embedded either in a silicate glass or in a porous alumina matrix, using time-resolved optical spectroscopy. The femtosecond pump–probe measurements, made under various conditions of excitation, reveal that the energy relaxation is faster as the particle size decreases. For particles with identical size and excitation conditions, the relaxation time is found to be faster for clusters in the alumina matrix. The influence of the surface acoustic modes and of the heat conductivity of the matrix on the energy relaxation is discussed.
doi_str_mv 10.1063/1.125460
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title Size dependence of the energy relaxation in silver nanoparticles embedded in dielectric matrices
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