Nobel Chemistry prize awarded for discovery of quantum dots that bring color to LED lights

[October 04, 2023]  By Niklas Pollard and Ludwig Burger

STOCKHOLM (Reuters) -Scientists Moungi Bawendi, Louis Brus and Alexei Ekimov won the 2023 Nobel Prize in Chemistry for "the discovery and synthesis of quantum dots," which illuminate computer monitors and television screens and are used by doctors to map tumors.

"The Nobel Laureates ... have succeeded in producing particles so small that their properties are determined by quantum phenomena. The particles, which are called quantum dots, are now of great importance in nanotechnology," the Nobel Committee for Chemistry said in a statement.

"Researchers believe that in the future they could contribute to flexible electronics, tiny sensors, thinner solar cells and encrypted quantum communication."

Nanoparticles and quantum dots are used in LED-lights and can also be used to guide surgeons while removing cancer tissue.

The more than century-old prize is awarded by the Royal Swedish Academy of Sciences and is worth 11 million Swedish crowns ($997,959).

Earlier on Wednesday, the academy appeared to have inadvertently published the names of the three scientists it said had won this year's Nobel Prize in chemistry.

Asked during a press conference how he felt to hear news of his award, Bawendi said by phone from the United States: "very surprised, sleepy, shocked, unexpected and very honored."

"I didn't think that I would get it," he added.

Among the "fascinating and unusual properties" of quantum dots is that they create different color lights, depending just on the particle size, while keeping the atomic structure unchanged, said Johan Aqvist, Chair of the Nobel Committee for Chemistry.

Bawendi is a professor at the Massachusetts Institute of Technology (MIT), Brus is professor emeritus at Columbia University and Ekimov works for Nanocrystals Technology Inc.

Brus was hired by AT&T Bell Labs in 1972 where he spent 23 years, devoting much of the time to studying nanocrystals.

Bawendi was born in Paris and grew up in France, Tunisia, and the U.S. Bawendi did his postdoctoral research under Brus then joined MIT in 1990 and became professor in 1996.

Hans Ellegren (centre), Permanent Secretary of the Royal Swedish Academy of Sciences, announces the winners of the 2023 Nobel Prize in Chemistry during a press conference at the Royal Swedish Academy of Sciences in Stockholm, Sweden, October 4, 2023. This year's Nobel Prize is awarded in 2023 to Moungi G. Bawendi, Massachusetts Institute of Technology (MIT), Cambridge USA, Louis E. Brus, Columbia University, New York USA and Alexei I. Ekimov, Nanocrystals Technology Inc., New York USA, for discovery and synthesis of quantum dots. On the left Professor Johan Aqvist and on the right Heiner Linke, Nobel Committee for Chemistry, Royal The Academy of Sciences. TT News Agency/Claudio Bresciani via REUTERS

Ekimov was born in the Soviet Union worked for the Vavilov State Optical Institute before moving to the United States. In 1999, Ekimov was named chief scientist at Nanocrystals Technology Inc.

The third of this year's crop of awards, the chemistry Nobel follows those for medicine and physics announced earlier this week.

Established in the will of Swedish dynamite inventor and chemist Alfred Nobel, the prizes for achievements in science, literature and peace have been awarded since 1901 with a few interruptions, primarily due to the world wars.

The economics prize is a later addition funded by the Swedish central bank.

While the chemistry awards are sometimes overshadowed by the physics prize and its famous winners such as Albert Einstein, chemistry laureates include many scientific greats, including radioactivity pioneer Ernest Rutherford and Marie Curie, who also won the physics prize.

Last year's chemistry award went to scientists Carolyn Bertozzi, Morten Meldal and Barry Sharpless for pioneering work in "click chemistry", discovering reactions that let molecules snap together to create new compounds.

($1 = 11.0225 Swedish crowns)

(Reporting by Niklas Pollard, Simon Johnson, Johan Ahlander in Stockholm and Ludwig Burger in Frankfurt; additional reporting by Terje Solsvik in Oslo, Anna Ringstrom in Stockholm, editing by Alexandra Hudson)

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