Acknowledgements

This chapter could not be written to its fullest without Dr. Nicolae Leopold, Prof. Dr. Vasile Chis (Biomolecular Physics Department, Babes-Bolyai University, Cluj-Napoca, Romania), and Dr. Christoph Haisch (Analytical Chemistry Chair, Technische Universität München, Germany) who served as my supervisors, as well as partners who challenged and encouraged me throughout my time spent as a PhD student. They would have never accepted anything less than my best efforts, and for that, I sincerely thank them. This work was supported by a grant of the Romanian National Authority for Scientific Research and Innovation, CNCS – UEFISCDI, project number PN-II-RU TE-2014-4-0862.
