Eur. Phys. J. D 43, 193-196 (2007)
https://doi.org/10.1140/epjd/e2007-00096-6

Photosensitization of oxygen molecules by surface-modified hydrophilic porous Si

¹ Department of Electrical and Electronics Engineering, Faculty of Engineering, Kobe University, Kobe, 657-8501, Japan
² Faculty of Science and Engineering, Konan University, Kobe, 658-8501, Japan
³ Institute for Chemical Research, Kyoto University, Kyoto, 611-0011, Japan
⁴ Department of Physics, University of Bath, Bath BA27, AY, UK

Corresponding author: ^a fujii@eedept.kobe-u.ac.jp

Received: 24 July 2006
Revised: 4 October 2006
Published online: 24 May 2007

Abstract

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.