ULTRAFAST ELECTRON DYNAMICS AT THE LIQUID-METAL INTERFACE - FEMTOSECOND STUDIES USING SURFACE-PLASMONS IN AQUEOUS SILVER COLLOID

被引:121
作者
ROBERTI, TW [1 ]
SMITH, BA [1 ]
ZHANG, JZ [1 ]
机构
[1] UNIV CALIF SANTA CRUZ,DEPT CHEM & BIOCHEM,SANTA CRUZ,CA 95064
关键词
D O I
10.1063/1.468545
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
We report direct femtosecond measurements of the dynamics of photoinduced electrons at the liquid-metal interface produced by exciting the surface plasmon band of aqueous silver colloidal particles. The electron plasma resonance created initially dephases into individually excited electrons in less than 150 fs. This is followed by a large component, fast exponential decay with a time constant of 2 ps, which is attributed to electronic energy relaxation through electron-phonon coupling. A slower 40 ps decay is also observed and attributed to subsequent cooling of the excited phonons due to phonon-solvent interaction. The decay dynamics, especially the 2 ps decay, are relatively insensitive to the solvent environment, indicating that the early time decay is dominated by the properties of the silver particles. The solvent molecules play an important role in the phonon cooling process following the electronic energy relaxation. The results show that the majority of the electrons created through photoexcitation of the plasmon band decay in less than 50 ps. © 1995 American Institute of Physics.
引用
收藏
页码:3860 / 3866
页数:7
相关论文
共 46 条
  • [11] SILVER ATOMS AND CLUSTERS IN AQUEOUS-SOLUTION - ABSORPTION-SPECTRA AND THE PARTICLE GROWTH IN THE ABSENCE OF STABILIZING AG+ IONS
    ERSHOV, BG
    JANATA, E
    HENGLEIN, A
    FOJTIK, A
    [J]. JOURNAL OF PHYSICAL CHEMISTRY, 1993, 97 (18) : 4589 - 4594
  • [12] FEMTOSECOND LASER INTERACTION WITH METALLIC TUNGSTEN AND NONEQUILIBRIUM ELECTRON AND LATTICE TEMPERATURES
    FUJIMOTO, JG
    LIU, JM
    IPPEN, EP
    BLOEMBERGEN, N
    [J]. PHYSICAL REVIEW LETTERS, 1984, 53 (19) : 1837 - 1840
  • [13] GENZEL L, 1975, Z PHYS B, V21, P39
  • [14] ADIABATIC OUTER SPHERE ELECTRON-TRANSFER THROUGH THE METAL ELECTROLYTE INTERFACE
    GORODYSKII, AV
    KARASEVSKII, AI
    MATYUSHOV, DV
    [J]. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1991, 315 (1-2): : 9 - 28
  • [15] Gratzel M., 1989, HETEROGENEOUS PHOTOC
  • [16] ULTRAFAST RELAXATION OF ELECTRONS PROBED BY SURFACE-PLASMONS AT A THIN SILVER FILM
    GROENEVELD, RHM
    SPRIK, R
    LAGENDIJK, A
    [J]. PHYSICAL REVIEW LETTERS, 1990, 64 (07) : 784 - 787
  • [17] THE OPTICAL-ABSORPTION SPECTRA OF SMALL SILVER CLUSTERS (N = 5-11) EMBEDDED IN ARGON MATRICES
    HARBICH, W
    FEDRIGO, S
    BUTTET, J
    [J]. CHEMICAL PHYSICS LETTERS, 1992, 195 (5-6) : 613 - 617
  • [18] ABSORPTION SPECTRUM OF HYDRATED ELECTRON IN WATER AND IN AQUEOUS SOLUTIONS
    HART, EJ
    BOAG, JW
    [J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1962, 84 (21) : 4090 - &
  • [19] SIZE-DEPENDENT SURFACE-PLASMON RESONANCES OF BARE SILVER PARTICLES
    HEATH, JR
    [J]. PHYSICAL REVIEW B, 1989, 40 (14) : 9982 - 9985
  • [20] HUFFMAN DR, 1988, OPTICAL EFFECTS ASS, pCH5