Li, Xin [P:(DE-Juel1)6775] ; Rohrer, F. [P:(DE-Juel1)16347] ; Brauers, T. [P:(DE-Juel1)16306] ; Hofzumahaus, A. [P:(DE-Juel1)16326] ; Lu, K. [P:(DE-Juel1)6776] ; Shao, M. [P:(DE-HGF)0] ; Zhang, Y. H. [P:(DE-HGF)0] ; Wahner, A. [P:(DE-Juel1)16324]