1. Department of Chemistry, Nanoscience Center, University of Jyväskylä, FI-40014 Jyväskylä, Finland
2. Department of Physics, Nanoscience Center, University of Jyväskylä, FI-40014 Jyväskylä, Finland
3. Carbon to Metal Coating Institute, Queen's University, Kingston, Ontario, K7L 3N6, Canada