1. Department of Materials Science and Engineering; National Cheng Kung University; No. 1, University Road Tainan 70101 Taiwan
2. Chemical Sciences and Engineering Division, Argonne National Laboratory; 9700 South Cass Avenue Argonne IL 60439-4837 USA
3. Institute of Microelectronics, Department of Electrical Engineering; National Cheng Kung University; No. 1, University Road Tainan 70101 Taiwan
4. X-Ray Science Division, Argonne National Laboratory; 9700 South Cass Avenue Argonne IL 60439-4837 USA
5. Materials Science & Eng Department and Bioengineering Department; University of Texas-Dallas; 800 W. Campbell Rd., RL10 Richardson TX 75080-3021 USA