1. Physics
Department, Institute for Energy Technology, P.O. Box 40, NO-2027 Kjeller, Norway
2. Department
of Physical and Colloid Chemistry, Ivan Franko National University of L’viv, 6 Kyryla and Mefodia Str., UA-79005 L’viv, Ukraine
3. Department
of Chemistry, University of Hawaii, Honolulu, Hawaii 96822, United States