Dan Shechtman

Dan Shechtman
Holger Motzkau · CC BY-SA 3.0 · source
Name	Dan Shechtman
Caption	Shechtman in 2011
Birth date	24 January 1941
Birth place	Tel Aviv, Mandatory Palestine
Nationality	Israeli
Fields	Materials science, Physics
Workplaces	Iowa State University, Technion – Israel Institute of Technology
Alma mater	Technion – Israel Institute of Technology
Known for	Discovery of quasicrystals
Prizes	Nobel Prize in Chemistry (2011), Wolf Prize in Physics (1999)

Dan Shechtman. An Israeli materials scientist and physicist, he is renowned for the revolutionary discovery of quasicrystals, a new form of matter that defied long-standing scientific dogma. His perseverance in the face of intense skepticism ultimately led to a paradigm shift in crystallography and solid-state physics, earning him the Nobel Prize in Chemistry in 2011. Shechtman's career has been primarily associated with the Technion – Israel Institute of Technology, where he has been a distinguished professor and influential researcher.

Early life and education

Dan Shechtman was born in Tel Aviv during the period of the British Mandate for Palestine. He served in the Israel Defense Forces before pursuing higher education in mechanical engineering at the prestigious Technion – Israel Institute of Technology in Haifa. After earning his Bachelor of Science degree in 1966, he continued at the same institution to complete a Master of Science in materials engineering in 1968. His doctoral studies, also at the Technion, focused on the microstructure and properties of titanium alloys, culminating in a PhD in 1972. Following his doctorate, he undertook a postdoctoral research fellowship at the Aerospace Research Laboratories at Wright-Patterson Air Force Base in Ohio, investigating the microstructure of high-strength aluminum alloys.

Discovery of quasicrystals

On April 8, 1982, while on a sabbatical at the U.S. Department of Commerce's National Institute of Standards and Technology (then the National Bureau of Standards), Shechtman observed a startling electron diffraction pattern from a rapidly cooled sample of an aluminum-manganese alloy. The pattern exhibited sharp Bragg peaks with tenfold rotational symmetry, a configuration strictly forbidden by the classical laws of crystallography. This indicated a solid with an atomic arrangement that was ordered but not periodic, contradicting the universal definition of a crystal. His findings were met with immediate derision and outright hostility from much of the scientific establishment, most notably from the influential Nobel laureate Linus Pauling, who dismissed the work as "nonsense". Despite immense pressure, Shechtman defended his data, eventually publishing the seminal paper "Metallic Phase with Long-Range Orientational Order and No Translational Symmetry" in the journal Physical Review Letters in 1984, co-authored with Ilan Blech, Denis Gratias, and John W. Cahn.

Scientific recognition and Nobel Prize

The validity of Shechtman's discovery was gradually confirmed by other research groups, including work by Dov Levine and Paul Steinhardt, who coined the term "quasicrystal" and developed the theoretical Penrose tiling model to explain the structure. Key experimental verification came from the independent synthesis of quasicrystalline materials by teams in France and Japan. Shechtman's tenacity was honored with numerous prestigious awards, including the Wolf Prize in Physics in 1999, the Israel Prize in Physics in 1998, and the Gregori Aminoff Prize from the Royal Swedish Academy of Sciences in 2000. The ultimate recognition arrived in 2011 when he was awarded the Nobel Prize in Chemistry "for the discovery of quasicrystals." The award highlighted a triumph of empirical observation over entrenched dogma and was celebrated as a victory for a courageous individual scientist.

Academic and professional career

Following his postdoctoral work, Shechtman returned to Israel and joined the faculty of the Technion – Israel Institute of Technology in 1975, where he founded and led a prolific research group. He held the Philip Tobias Professorship and was a distinguished professor in the Department of Materials Science and Engineering. He also maintained a long-term association with the United States, serving as a professor at Iowa State University and a Ames Laboratory associate at the U.S. Department of Energy's Ames National Laboratory. Beyond his research, Shechtman has been an advocate for science education and entrepreneurship, founding the Technion Entrepreneurship Center and promoting technological innovation in Israel. He is a member of the Israel Academy of Sciences and Humanities, the National Academy of Engineering, and a fellow of the Materials Research Society.

Impact and legacy

Dan Shechtman's discovery fundamentally altered the understanding of the atomic architecture of solids, forcing the International Union of Crystallography to revise its official definition of a crystal in 1992. The field of quasicrystal research has expanded significantly, with such materials being synthesized in numerous laboratories worldwide and studied for their unique physical properties, including low thermal conductivity, high hardness, and non-stick surfaces. Natural quasicrystals were later discovered in a meteorite from the Koryak Mountains in Russia, proving their stability in nature. His story is frequently cited as a classic example of scientific resilience, illustrating the importance of challenging prevailing scientific consensus with rigorous experimental evidence. The Dan Shechtman Award was established by the European Materials Research Society to honor young scientists in the field he pioneered.

Category:Israeli physicists Category:Nobel laureates in Chemistry Category:Wolf Prize in Physics laureates Category:Technion – Israel Institute of Technology faculty