EMILIO SEGRE VISUAL ARCHIVES / AMERICAN INSTITUTE OF PHYSICS / SCIENCE PHOTO LIBRARY EMILIO SEGRE VISUAL ARCHIVES / AMERICAN INSTITUTE OF PHYSICS / SCIENCE PHOTO LIBRARY
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Ahmed Zewail (1946-2016), Egyptian-US physical chemist. Zewail was one of the pioneers of femtochemistry, the use of ultrafast lasers to study chemical reactions on very short timescales. Zewail studied chemistry in Egypt and the USA, and was appointed Linus Pauling Chair in Chemical Physics at the California Institute of Technology in 1976. His pioneering experiments on femtochemistry took place in the 1980s. Zewail was awarded the 1999 Nobel Prize in Chemistry for his studies of the transition states of chemical reactions using femtosecond spectroscopy. Zewail, who was a US science envoy and was also active in Egyptian politics, received many other awards. Photographed in April 1998.
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