1. Department of Chemical Engineering, Dupuis Hall, Queen's University, Kingston, Ontario, K7L 3N6, Canada
2. Department for Biomaterials Research, Polymer Institute of the Slovak Academy of Sciences, Dúbravská cesta 9, 845 41 Bratislava, Slovakia
3. Centre for Advanced Materials Application, Slovak Academy of Sciences, Dúbravská cesta 9, 845 11, Bratislava, Slovakia