1. Department of Computer Science and Information Engineering, National Taiwan University, No.1 Sec.4, Roosevelt Road, Taipei 106, Taiwan
2. Graduate Institute of Biomedical Electronics and Bioinformatics, National Taiwan University, No.1 Sec.4, Roosevelt Road, Taipei 106, Taiwan
3. Department of Chemistry, National Taiwan University, No.1 Sec.4, Roosevelt Road, Taipei 106, Taiwan
4. IBM Almaden Research Center, 650 Harry Rd, San Jose, California 95120, United States
5. Advanced Materials Center, Nano Patterning Technology Division, Taiwan Semiconductor Manufacturing Company, 168 Park Ave, 2, Hsinchu Science Park, Hsinchu 300, Taiwan