The 2023 Nobel Prize in Chemistry was awarded today to three scientists for the discovery of quantum dots. These are nanoparticles so small that their size controls their many properties, such as their color.
The winners are Moungi Bawendi of the Massachusetts Institute of Technology, Louis Brus of Columbia University, and Alexei Ekimov from Nanocrystals Technology Inc. in New York State. The three scientists will share the prize of $997,959. Today quantum dots are common materials in TV screens, producing a cornucopia of colors. Essentially, they are compressed balls containing electrons. “If you take an electron and put it into a small space, its wave function gets compressed,” said Johan Aqvist, chair of the Nobel committee for the chemistry prize, at the announcement. “It stores more energy.” So, for example, the smallest dots will emit more blue light than red. Enlarging them slightly will change the color composition.
The dots are also used in biomedical imaging, to visualize blood vessels feeding tumors, and in solar cells. Bawendi, when reached by phone by the Royal Swedish Academy of Sciences after the announcement, said he was “very surprised, shocked … and very honored.”
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