1. Nanofabrication Center, School
of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798
2. Institute of Materials Research
and Engineering, A*STAR, 3 Research Link,
Singapore 117602
3. CINTRA CNRS/NTU/THALES, UMI 3288, Research Techno Plaza,
50 Nanyang Drive, Border X Block,
Level 6, Singapore 637553