1. Department of Materials and Environmental Technology Tallinn University of Technology Ehitajate tee 5 19086 Tallinn Estonia
2. Department of Chemistry and Biotechnology Tallinn University of Technology Akadeemia tee 15 12618 Tallinn Estonia
3. Virumaa College Tallinn University of Technology Järveküla tee 75 30322 Kohtla-Järve Estonia
4. Institute of Technology University of Tartu Nooruse 1 50411 Tartu Estonia
5. National Institute of Chemical Physics and Biophysics Akadeemia tee 23 12618 Tallinn Estonia
6. University of Lincoln LN6 7DL Lincoln Lincolnshire UK