1. Nano-Electro Mechanical Device Laboratory
2. School of Mechanical Engineering
3. Yonsei University
4. Seoul 120-749
5. South Korea
6. School of Mathematics
7. University of East Anglia
8. Norwich
9. UK
10. Institute of Applied Physics and Materials Engineering
11. University of Macau
12. Avenida da Universidade
13. Macau
14. China