Ahmed Zewail(1946 — 2016)
Ahmed Zewail
États-Unis, Égypte
8 min read
Egyptian-American chemist and pioneer of femtochemistry, he revolutionized the observation of chemical reactions by filming the movement of atoms at the femtosecond timescale. Winner of the Nobel Prize in Chemistry in 1999, he is regarded as the father of ultrafast chemistry.
Frequently asked questions
Famous Quotes
« Science is the greatest collective endeavor. It contributes to the GDP but, more than that, it contributes to human welfare. »
Key Facts
- Born on February 26, 1946, in Damanhour, Egypt
- Developed femtochemistry in the 1980s at Caltech
- Nobel Prize in Chemistry in 1999 for his work on the transition states of chemical reactions
- First direct observation of molecules in the act of breaking apart and reforming
- Died on August 2, 2016, in Pasadena, California
Works & Achievements
A series of pioneering experimental studies using femtosecond lasers to observe, in real time, the motion of atoms during a chemical reaction. This discovery founded an entirely new scientific discipline.
A landmark review article that codifies and officially names femtochemistry, describing the theoretical and experimental foundations for observing chemical transition states on the femtosecond timescale.
A memoir blending life and science in which Zewail traces his journey from Egypt to the United States. Written in an accessible style, it has become an inspiring reference for young scientists across the Arab world.
A major scientific work presenting the full body of research produced by Zewail's group at Caltech, and the founding reference text for femtochemistry within the international scientific community.
Zewail applied the time-resolved principles of femtochemistry to electron microscopy, achieving resolution that is simultaneously atomic in space and femtosecond in time, opening the door to dynamic nanoscience.
A major non-scientific achievement: the creation of a research university in Egypt dedicated to training the next generation of scientists from the Arab world, giving concrete form to Zewail's conviction that science is a lever for national development.
Anecdotes
Ahmed Zewail grew up in Desouk and then Damanhour, Egypt, in a modest family. His father, a civil servant with a passion for culture, hung a photo of Einstein on the living room wall — it was before that image that young Ahmed decided he would become a scientist. That ambition would lead him, decades later, to join the pantheon of Nobel Prize winners.
In 1987, in his laboratory at the California Institute of Technology (Caltech), Zewail carried out a groundbreaking experiment: using laser pulses lasting just a few femtoseconds (one millionth of a billionth of a second), he became the first to 'photograph' chemical bonds in the act of breaking. He had just invented femtochemistry — an entirely new scientific discipline.
When he received the Nobel Prize in Chemistry in 1999, Ahmed Zewail became the first Arab and African scientist to win the prize in a scientific field. In Stockholm, he delivered his acceptance speech wearing a tie in the colors of the Egyptian flag, as a tribute to his homeland. News of his award sparked spontaneous celebrations in the streets of Cairo.
In 2009, President Barack Obama appointed Zewail as the first United States Science Envoy to the Middle East, as part of his administration's outreach to the Muslim world. Zewail accepted the diplomatic role while continuing his research, firmly believing that science could serve as a bridge between cultures and nations.
Shortly after the Egyptian revolution of 2011, Ahmed Zewail launched a project to build a world-class research university in Egypt — Zewail City of Science and Technology (ZSU), inaugurated in 2011 near Cairo. His goal was to give young Egyptians access to world-class scientific education without having to leave their country.
Primary Sources
The 1999 Nobel Lecture by Ahmed Zewail describes how femtosecond laser pulses allow the direct observation of atoms in motion during a chemical reaction, transforming chemistry from a science of before-and-after snapshots to one of real-time molecular movies.
Zewail recounts his childhood in Egypt, his arrival in the United States, and the intellectual milestones that led him to femtochemistry: "Science has no borders, but scientists have roots."
Published in Science, this paper reports the first direct real-time observation of a transition state in a chemical reaction, using a pump-probe femtosecond laser technique applied to the dissociation of ICN molecules.
Delivered in the context of Obama's Cairo speech, with Zewail present, this occasion illustrates the symbolic role assigned to science as a vehicle for dialogue: Zewail argued for scientific education as a prerequisite for the development of Arab nations.
Key Places
City in the Nile Delta where Ahmed Zewail was born in 1946. It was in this modest yet culturally stimulating family environment that he first developed his scientific curiosity.
The institution where Zewail earned his bachelor's degree in chemistry in 1967. This solid grounding in classical chemistry provided the foundation on which he would later build his revolutionary work.
Where Zewail completed and defended his doctoral dissertation in 1974, discovering the world of American research and its experimental resources, which were inaccessible to him in Egypt at the time.
The center of his entire scientific career from 1976 until his death in 2016. It was in Caltech's laboratories that he invented femtochemistry and trained several generations of researchers.
The place where Zewail received the Nobel Prize in Chemistry in December 1999. The ceremony marked worldwide recognition of femtochemistry and was celebrated as a source of national pride in Egypt.
An institution founded by Zewail himself in 2011 near Cairo to provide Egyptian youth with world-class scientific training — a lasting legacy of his lifelong commitment to education.
