Photocurrent generation properties of Histag-photosystem II immobilized on nanostructured gold electrode

Nao Terasaki, Masako Iwai, Noritaka Yamamoto, Takashi Hiraga, Sunao Yamada, Yasunori Inoue

    Research output: Contribution to journalArticlepeer-review

    72 Citations (Scopus)


    It is well known that photosystem II (PSII) can produce electrons, oxygen, and protons simultaneously via a water-splitting photoreaction. These photochemical properties are expected to exhibit photoconductive function for PSII. In the present study, we have first observed a stable photocurrent due to the photoexcitation of PSII and the subsequent water-splitting reaction, by successfully immobilizing PSII on the self-assembled monolayer (SAM) of a nickel-nitrilotriacetic acid complex (Ni-NTA) prepared on a gold surface via a polyhistidine tag (Histag) as a linker molecule. We have further succeeded in the fabrication of PSII-gold nanoparticle multistructures on the surface of gold electrode, and significant enhancement of photocurrents was achieved due to increased number of immobilized PSII.

    Original languageEnglish
    Pages (from-to)2553-2557
    Number of pages5
    JournalThin Solid Films
    Issue number9
    Publication statusPublished - Mar 3 2008

    All Science Journal Classification (ASJC) codes

    • Electronic, Optical and Magnetic Materials
    • Surfaces and Interfaces
    • Surfaces, Coatings and Films
    • Metals and Alloys
    • Materials Chemistry


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