Carbon Nanodisks Decorated with Guanidinylated Hyperbranched Polyethyleneimine Derivatives as Efficient Antibacterial Agents oleh Kyriaki-Marina Lyra, Ioannis Tournis, Mohammed Subrati, Konstantinos Spyrou, Aggeliki Papavasiliou, Chrysoula Athanasekou, Sergios Papageorgiou, Elias Sakellis, Michael A. Karakassides, Zili Sideratou