1. Overlege Kindts
gate 16a, 7052 Trondheim, Norway
2. Department
of Chemistry, NTNU, Norwegian University of Science and Technology, 7491 Trondheim, Norway
3. Department
of Physics, NTNU, Norwegian University of Science and Technology, 7491 Trondheim, Norway
4. Faculty
of Engineering, Østfold University College, 1757 Halden, Norway