1. Division of Bioengineering and Surface Electrochemistry, Department of Engineering and Informatics Systems; Koszalin University of Technology; Racławicka 15-17 Koszalin PL 75-620 Poland
2. Department of Physics; Norwegian University of Science and Technology (NTNU); Realfagbygget E3-124 Høgskoleringen 5 Trondheim NO 7491 Norway
3. HORIBA Jobin Yvon SAS; 16-18, rue du Canal Longjumeau cedex 91165 France