1. Department
of Materials and Environmental Chemistry, Stockholm University, SE-106
91 Stockholm, Sweden
2. Department of Analytical Chemistry, Stockholm University, SE-106 91 Stockholm, Sweden
3. Wallenberg Wood Science Center, Royal Institute of Technology, KTH, SE-10044 Stockholm, Sweden
4. Division of Materials
Science, Luleå University of Technology, Luleå, SE- 97187 Sweden