1. Solid State Physics, Lund University, Box 118, S-221 00 Lund, Sweden
2. Polymer & Materials Chemistry, Lund University, Box 124, S-221 00 Lund, Sweden
3. Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, United
States
4. IBM Research Division, T. J. Watson Research Center, Yorktown
Heights, New York 10598,
United States
5. Department
of Materials Science
and Engineering, University of California Los Angeles, Los Angeles, California 90095, United States