Gan, L. [P:(DE-HGF)0] ; Cui, C. [P:(DE-HGF)0] ; Heggen, M. [P:(DE-Juel1)130695] ; Dionigi, F. [P:(DE-HGF)0] ; Rudi, S. [P:(DE-HGF)0] ; Strasser, P. [P:(DE-HGF)0]