期刊
APPLIED PHYSICS LETTERS
卷 96, 期 21, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3432349
关键词
luminescence; nanostructured materials; photochemistry; silicon
资金
- EPSRC [EP/E012183/1]
- U.S. Army [W911NF0820011]
- DFG [SFB 445]
- Engineering and Physical Sciences Research Council [EP/E012183/1, EP/E012183/2] Funding Source: researchfish
- EPSRC [EP/E012183/2, EP/E012183/1] Funding Source: UKRI
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. (C) 2010 American Institute of Physics. [doi:10.1063/1.3432349]
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