%0 Journal Article %T Structural and optical properties of si and ge nanocrystals embedded in sio2 matrix by ion implantation %A TURAN, R. %A SERINCAN, U. %A KARTOPU, G. %A FINSTAD, T.G. %J Sigma Journal of Engineering and Natural Sciences %D 2004 %V 22 %P 1-12 %R