PHOTOLUMINESCENCE AND PHOTOLUMINESCENCE EXCITATION OF SI AEROGELS PREPARED BY SUPERCRITICAL DRYING

Si aerogel, the porous silicon with ultra high porosity, has been prep ared by the technique of anodization followed by supercritical drying. Its photoluminescence, photoluminescence excitation and morphological features exhibit novel characteristics from those of the conventional ly anodized porous silicon. We observed the differences between the Si aerogels made from (100) and (111) crystalline Si.