A Green Route to Copper Loaded Silica Nanoparticles Using Hyperbranched Poly(Ethylene Imine) as a Biomimetic Template: Application in Heterogeneous Catalysis oleh Dimitris Tsiourvas, Aggeliki Papavasiliou, Evangelia G. Deze, Sergios K. Papageorgiou, Fotios K. Katsaros, George E. Romanos, Evangelos Poulakis, Constantine J. Philippopoulos, Qi Xin, Pegie Cool