Author/Authors :
Xiaotao Hao and Xiangdong Liu، نويسنده , , Jin Ma، نويسنده , , Deheng Zhang، نويسنده , , Tianlin Yang، نويسنده , , Honglei Ma، نويسنده , , Yingge Yang، نويسنده , , Chuanfu Cheng، نويسنده , , Jie Huang، نويسنده ,
Abstract :
This paper has been retracted by the Publisher.
Reason: Due to a mistake at the production stage it has been published twice. The full original paper may be found in Applied Surface Science, Volume 183/1–2 (2001) pp. 137–142.
