LUMINESCENT INTRAZEOLITIC SI NANOCLUSTERS - SIZE STUDY BY SI K AND L-2,L-3 X-RAY-ABSORPTION NEAR-EDGE STRUCTURE, X-RAY PHOTOELECTRON AND PHOTOLUMINESCENCE SPECTROSCOPIES

A series of intrazeolitic silicon nanoclusters prepared from different Si loadings are investigated by Si K and L-2,L-3 x-ray absorption nea r-edge structure, x-ray photoelectron and photoluminescence spectrosco pies. They exhibit strong room-temperature photoluminescence in the ye llow-orange region, It is found that the growth of Si clusters within the pores of zeolite Y is limited to an average size of about 75 Si at oms per unit cell. (C) 1997 American Institute of Physics.