[1] Dept. of General Chemistry, University POLITEHNICA of Bucharest, Romania
[2] Dept. of Nuclear Materials and Corrosion, RATEN Institute for Nuclear Research, Mioveni, Romania
[3] Academy of Romanian Scientists, Bucharest, Romania
[4] Low Plasma Temperature Laboratory, National Institute for Laser, Plasma and Radiation Physics, Magurele, Romania
[5] National Institute for Research and Development in Microtechnologies-IMT Bucharest, Bucharest, Romania