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 language | English |
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Article number | 211901 |
Journal | Applied Physics Letters |
Volume | 96 |
Issue number | 21 |
DOIs | |
Publication status | Published - 24 May 2010 |
Keywords
- luminescence
- nanostructured materials
- photochemistry
- silicon