1. National Institute for Research and Development of Isotopic and Molecular Technologies, Donath Street, No. 65-103, RO-400293 Cluj-Napoca, Romania
2. Nanobiophoton Center, Interdisciplinary Research Institute in Bio-Nano-Science, Babes-Bolyai University, Cluj Napoca 400084, Romania
3. Nanotechnology Center, Systems Engineering Department, University Arkansas at Little Rock, 2801 S. University Avenue, Little Rock, Arkansas 72204, United States