2023 Nobel Chemistry Prize awarded to Moungi Bawendi, Louis Brus and Aleksey Ekimov for ‘quantum dots’ that bring coloured light to screens

Dear Commons Community,

Scientists Moungi Bawendi, Louis Brus and Aleksey Ekimov won the 2023 Nobel Prize in Chemistry for their discovery of tiny clusters of atoms known as quantum dots, widely used today to create colors in flat screens, light emitting diode (LED) lamps and devices that help surgeons see blood vessels in tumours.

The prize-awarding academy said that their findings on quantum dots, which in size ratio have the same relationship to a football, as a football to the earth, had “added color to nanotechnology” – when matter is used on an atomic or molecular level in manufacturing.

“Researchers believe that in the future they could contribute to flexible electronics, tiny sensors, thinner solar cells and encrypted quantum communication,” the academy said in a statement.

The more than century-old prize is awarded by the Royal Swedish Academy of Sciences and is worth 11 million Swedish crowns ($1 million).

One of the “fascinating and unusual properties” of quantum dots is that they change light color depending on the particle size, while keeping the atomic structure unchanged, said Johan Aqvist, Chair of the Nobel Committee for 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.”

He added that quantum dots were still being heavily researched. “I’m sure something really interesting is going to come out this.”

The quantum dot technology, which enabled high-definition QLED TVs sold by Samsung, Sony or TCL, traces its roots to early 1980s work by Ekimov.

At the time, he discovered that the color of glass changes with the size of copper chloride molecules contained in it and that sub-atomic forces were at play.

Speaking to Reuters on the phone, 78-year-old Ekimov who was born in the Soviet Union and later moved to the U.S., marvelled at the latest flat screen technology, something he did not envision during his early pioneering work. “Remember what a TV was back then!” he said, laughing.

A few years later, Brus extended the work to fluids.

In 1993, Bawendi revolutionised the production of quantum dots and improved their quality. Among other uses, the research enabled LEDs that shine more like natural sunlight, avoiding the bluish neon light they were previously shunned for.

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 United States.

Congratulations to all!

Tony

 

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