1. Microelectronics
and Materials Physics Laboratories, Department of Electrical Engineering, University of Oulu, P.O.
Box 4500, FI-90014 Oulu, Finland
2. Technical
Chemistry, Department of Chemistry, Chemical-Biological Center, Umeå University, SE-90187 Umeå, Sweden
3. Laboratory
of Industrial Chemistry and Reaction Engineering, Department of Chemical
Engineering, Process Chemistry Centre Åbo Akademi University, Åbo FI-20500, Finland