Prof. Zacharias studied Physics and Biophysics in Hannover, finished his Dissertation (1978) and Habilitation (1984) in Bielefeld. He was visiting Scientist at IBM, Yorktown Heights, (1981-83,1984,1988) and Heisenberg Fellow (1986 – 89). In 1989 he became Professor in Essen and since 1996 in Münster. Current reseach interest concentrate on ultrafast electron dynamics in 2D systems, electronic interaction in organic adsorbates, and processes related to photon-induced reactions on and in cold molecular ices, relevant for the interstellar medium. Activities in connection with Free Electron Lasers (FLASH, XFEL) concern the development of x-ray split-and-delay units for x-ray pump-probe experiments.