TY - JOUR TI - Structural and optical properties of si and ge nanocrystals embedded in sio2 matrix by ion implantation AU - TURAN, R. AU - SERINCAN, U. AU - KARTOPU, G. AU - FINSTAD, T.G. JO - Sigma Journal of Engineering and Natural Sciences PY - 2004 VL - 22 SP - 1 EP - 12 DO - ER -