Phys. Rev. Lett. 85, 2200–2203 (2000)Size-Dependent Electron-Electron Interactions in Metal NanoparticlesReceived 28 April 2000; published in the issue dated 4 September 2000 The internal thermalization dynamics of the conduction electrons is investigated in silver nanoparticles with radius ranging from 13 to 1.6 nm using a femtosecond IR pump–UV probe absorption saturation technique. A sharp increase of the electron energy exchange rate is demonstrated for nanoparticles smaller than 5 nm. The results are consistent with electron-electron scattering acceleration due to surface induced reduction of the Coulomb interaction screening by the conduction and core electrons. © 2000 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.85.2200
DOI:
10.1103/PhysRevLett.85.2200
PACS:
78.47.+p, 42.65.-k, 73.61.Tm
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