Phys. Rev. Lett. 78, 3575–3578 (1997)Ultrafast Electronic Dynamics in Solid and Liquid Gallium NanoparticlesReceived 26 December 1996; published in the issue dated 5 May 1997 The electron thermalization process both in solid and liquid metallic gallium nanoparticles with radii in the range 50–90 Å is investigated by femtosecond pump-probe measurements. The results show that the temporal behavior of the electron energy relaxation is similar in both phases, with a time constant varying from ∼0.6 to ∼1.6ps by increasing the nanoparticle size. We interpret the experimental data in terms of a size-dependent electron-surface interaction model and show the importance of the energy exchange with surface phonons in the electronic thermalization. © 1997 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.78.3575
DOI:
10.1103/PhysRevLett.78.3575
PACS:
78.47.+p, 71.24.+q
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