The present state-of-the-art in understanding the mechanisms of the formati
on of porous silicon (PS) and its physical properties is reviewed, with spe
cial emphasis on problems which were not much in the focus of existing revi
ew literature: mechanisms of the pore growth, stability of the PS propertie
s in environment and electrical properties of PS layers. Emerging applicati
ons of porous silicon in different fields of technology are outlined. (C) 1
999 Published by Elsevier Science Ltd. All rights reserved.