1. Department of Information Technology University of Turku FI‐20014 Turku Finland
2. Department of Chemistry University of Helsinki FI‐00014 Helsinki Finland
3. Industrial and Academic Collaboration Foundation Hoseo University 336‐795 Asan Korea
4. Department of Physics University of Turku FI‐20014 Turku Finland
5. Department of Safety Engineering Hoseo University 336‐795 Asan Korea
6. Department of Biomaterials Science and Turku Clinical Biomaterials Centre University of Turku FI‐20520 Turku Finland