**Author details**

Lucia Marin Biolan1\*, Andrei Bedros Agop2 and Doriana Forna3

\*Address all correspondence to: luciamarin2015@yahoo.com

1 Faculty of Physics, "Alexandru Ioan Cuza" University of Iaşi, Iaşi, România

2 Faculty of Material Science and Engineering, "Gheorghe Asachi" Technical University of Iaşi, Iaşi, România

3 Faculty of Dental Medicine, "Grigore T. Popa" University of Medicine and Pharmacy of Iaşi, Iaşi, România
