Light-harvesting bio-nanomaterial using porous silicon and photosynthetic reaction center

Kata Hajdu, Csilla Gergely, Marta Martin, László Zimányi, Vivechana Agarwal, Gabriela Palestino, Klára Hernádi, Zoltán Németh, László Nagy

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Porous silicon microcavity (PSiMc) structures were used to immobilize the photosynthetic reaction center (RC) purified from the purple bacterium Rhodobacter sphaeroides R-26. Two different binding methods were compared by specular reflectance measurements. Structural characterization of PSiMc was performed by scanning electron microscopy and atomic force microscopy. The activity of the immobilized RC was checked by measuring the visible absorption spectra of the externally added electron donor, mammalian cytochrome c. PSi/RC complex was found to oxidize the cytochrome c after every saturating Xe flash, indicating the accessibility of specific surface binding sites on the immobilized RC, for the external electron donor. This new type of bio-nanomaterial is considered as an excellent model for new generation applications of silicon-based electronics and biological redox systems.

Original languageEnglish
Article number400
JournalNanoscale Research Letters
Publication statusPublished - Jan 1 2012



  • Biophotonics
  • Nanomaterial
  • Peptide
  • Photosynthetic reaction center
  • Porous silicon functionalization

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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