Silicon nanocrystals dispersed in water: Photosensitizers for molecular oxygen

Bernhard Goller, Sergej Polisski, H Wiggers, Dmitry Kovalev

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

We report on the synthesis of freestanding silicon spheres having sizes in the range of 3-10 nm. As-prepared luminescent silicon nanocrystals have H-passivated surface. Therefore, energy transfer from excitons confined in Si nanocrystals to oxygen molecules is found to be efficient. It is demonstrated that a termination of silicon nanocrystal H-passivated hydrophobic surface by lipids provides their water solubility. We found that this procedure preserves photosensitizing ability of silicon nanocrystals. Therefore, this material system can potentially be employed for a variety of biomedical applications.
Original languageEnglish
Article number211901
JournalApplied Physics Letters
Volume96
Issue number21
DOIs
Publication statusPublished - 24 May 2010

Keywords

  • luminescence
  • nanostructured materials
  • photochemistry
  • silicon

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