Picosecond energy transfer at gold/electrolyte interfaces using transient reflecting grating method under surface plasmon resonance condition

Kenji Katayama, Tsuguo Sawada, Isao Tsuyumoto, Akira Harata

    Research output: Contribution to journalArticle

    5 Citations (Scopus)

    Abstract

    The energy transfer dynamics at gold/NaCl aq (00.5 M) interfaces was investigated using our recently developed surface plasmon resonance transient reflecting grating (SPR-TRG) method. We focused on two exponential decays in the SPR-TRG signals. The two decays correspond to the relaxation of hot electrons and interfacial heat transfer, respectively. The intensity of each decay changes systematically with increases in the concentration of NaCl, i.e., the former becomes smaller and the latter becomes larger. Considering the relation between the intensity and the dynamics, we concluded that there is some interaction between the hot electrons and the adsorbate on the interface and that the following temperature rise in gold after relaxation of the hot electrons becomes large. This conclusion shows that an ultrafast energy transfer processes by hot electrons exists, and that the process is hindered by the adsorbate. Finally, we discuss the ultrafast energy transfer in relation to the hot electrons and adsorbate on a molecular scale.

    Original languageEnglish
    Pages (from-to)2383-2388
    Number of pages6
    JournalBulletin of the Chemical Society of Japan
    Volume72
    Issue number11
    Publication statusPublished - Nov 1999

    All Science Journal Classification (ASJC) codes

    • Chemistry(all)

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