Ahmed Zewail
Egyptian-American chemist; Nobel laureate; father of femtochemistry.
Ahmed Hassan Zewail, an Egyptian-American chemist born in Damanhur, Egypt, on February 26, 1946, and raised in Desouk, is celebrated as the founder of femtochemistry. He earned his bachelor’s and master’s degrees from Alexandria University before moving to the United States for a PhD at the University of Pennsylvania under Robin M. Hochstrasser. After postdoctoral work at the University of California, Berkeley, with Charles B. Harris, he joined the California Institute of Technology (Caltech) faculty in 1976. There, he became the first holder of the Linus Pauling Chair of Chemical Physics and directed the Physical Biology Center for Ultrafast Science and Technology. He became a U.S. citizen in 1982.
Zewail’s pioneering research used ultrafast laser flashes to observe chemical reactions on a femtosecond timescale, allowing scientists to analyze transition states in reactions. This work earned him the 1999 Nobel Prize in Chemistry, making him the first Egyptian, Arab, and African to win a Nobel in a scientific field. He also advanced ultrafast electron diffraction, employing short electron pulses to study reaction dynamics. He served on President Barack Obama’s Presidential Council of Advisors on Science and Technology and, in 2010, became one of the first U.S. science envoys to the Muslim world, visiting countries from North Africa to Southeast Asia. During the 2011 Egyptian protests, he returned to Egypt, joining a constitutional reform committee and acting as an intermediary between the military regime and revolutionary youth groups. He consistently stated he had no political ambition, wishing only to serve Egypt through science.
Zewail received numerous honors, including Egypt’s Grand Collar of the Nile, the Wolf Prize in Chemistry, the Albert Einstein World Award of Science, the Priestley Medal, and the Davy Medal. He was elected to the National Academy of Sciences, the American Academy of Arts and Sciences, the American Philosophical Society, and as a Foreign Member of the Royal Society. The American Chemical Society established the Ahmed Zewail Award for Ultrafast Science and Technology in his name. He died on August 2, 2016.
- field
- Chemistry, Physics
- nationality
- Egyptian-American
- known_for
- Father of femtochemistry; Nobel Prize in Chemistry (1999)
Lore & Background
Ahmed Zewail was an Egyptian-American chemist recognized as the founder of femtochemistry, the study of chemical reactions occurring on a femtosecond timescale. He developed a rapid ultrafast laser technique using ultrashort flashes, enabling the description of reactions over extremely short periods—brief enough to analyze transition states in selected chemical processes. His work also advanced ultrafast electron diffraction, which employs short electron pulses instead of light pulses to investigate chemical reaction dynamics. Born in Damanhur, Egypt, and raised in Desouk, he earned bachelor’s and master’s degrees in chemistry from Alexandria University before completing his PhD at the University of Pennsylvania under Robin M. Hochstrasser. Following postdoctoral research at the University of California, Berkeley, supervised by Charles B. Harris, he joined the California Institute of Technology (Caltech) faculty in 1976, where he became the first Linus Pauling Chair of Chemical Physics and directed the Physical Biology Center for Ultrafast Science and Technology. He became a naturalized U.S. citizen in 1982. In 1999, he received the Nobel Prize in Chemistry, becoming the first Egyptian, Arab, and African to win a Nobel in a scientific field. He served on President Barack Obama’s Presidential Council of Advisors on Science and Technology and, in 2010, became one of the first U.S. science envoys to the Muslim world, visiting countries from North Africa to Southeast Asia. During the 2011 Egyptian protests, he returned to Egypt and acted as an intermediary between the military regime and revolutionary youth groups.
Reader's Guide
Ahmed Zewail’s foundational work in femtochemistry revolutionized the study of chemical reactions by enabling observation of atomic-scale dynamics on a femtosecond timescale. Using an ultrafast laser technique with ultrashort flashes, he could analyze transition states in selected reactions, earning him the title "father of femtochemistry" and the 1999 Nobel Prize in Chemistry. He also advanced ultrafast electron diffraction, employing short electron pulses instead of light pulses to probe reaction dynamics. Beyond research, Zewail served as a U.S. science envoy to the Muslim world, visiting multiple countries from North Africa to Southeast Asia as part of a program announced by President Barack Obama. During the 2011 Egyptian protests, he returned to Egypt and joined a constitutional reform committee, later acting as an intermediary between the military regime and revolutionary youth groups. His significance thus spans both the creation of a new field that directly visualizes chemical bond dynamics in space and time, and his diplomatic efforts bridging science and political transition.
Did You Know?
- Ahmed Zewail was the first Egyptian and Arab to win a Nobel Prize in a scientific field.
- He became a naturalized U.S. citizen on March 5, 1982.
- Zewail served on President Barack Obama's Presidential Council of Advisors on Science and Technology.
- During the 2011 Egyptian protests, he returned to Egypt and acted as an intermediary between the military regime and revolutionary youth groups.
- He was the first African to win the Nobel Prize in Chemistry.
Frequently Asked Questions
Who is Ahmed Zewail?
Ahmed Hassan Zewail was an Egyptian-American scientist who specialized in chemistry and physics. He is most widely recognized as the pioneer of femtochemistry, a field that studies ultrafast molecular processes.
What is femtochemistry and what role did Zewail play in it?
Femtochemistry is the study of chemical reactions occurring on the timescale of a femtosecond, or one quadrillionth of a second. Zewail developed the techniques that made it possible to observe and track these incredibly brief molecular events, earning him the title 'father of femtochemistry.'
What Nobel Prize did Ahmed Zewail receive and why was it historic?
In 1999 he was awarded the Nobel Prize in Chemistry for his groundbreaking femtochemistry research. This made him the first person of Egyptian or Arab heritage to claim a Nobel Prize in any scientific discipline.
Where did Ahmed Zewail hold his academic position?
He spent his career as a professor of chemistry and physics at the California Institute of Technology (Caltech). There he occupied the Linus Pauling Chair of Chemical Physics and led the Physical Biology Center for Ultrafast Science and Technology.
When was Ahmed Zewail born and when did he die?
He was born on February 26, 1946, in the town of Damanhur in Egypt, and passed away on August 2, 2016. His life spanned seven decades during which he fundamentally reshaped how scientists observe chemical reactions at the molecular level.
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