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 journalArticle

63 Citations (Scopus)

Abstract

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
Volume516
Issue number9
DOIs
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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