Photosensitization of oxygen molecules by surface-modified hydrophilic porous Si
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Hydrophilic porous Si is prepared by surface modification with polyethylene oxide (PEO) molecules. The surface modification is confirmed by infrared absorption spectroscopy and photoluminescence spectroscopy. The effect of surface modification on the efficiency of photosensitization of oxygen molecules, i.e., the efficiency of singlet oxygen generation, is studied. The PEO-terminated hydrophilic porous Si is shown to hold the photosensitization ability although the efficiency is reduced by the modification.
PACS.71.35.Gg Exciton-mediated interactions 33.50.Hv Radiationless transitions, quenching
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