1. Department of Condensed Matter, National Institute for Research and Development in Electrochemistry and Condensed Matter, Timisoara 300224, Romania
2. SYNLAB Holding Deutschland GmbH, Trier 54290, Germany
3. Department of Chemistry, The College of Arts & Science, Indiana University, Bloomington, Indiana 47405, United States
4. Department of Technical and Natural Sciences, “Aurel Vlaicu” University of Arad, Arad 310330, Romania