Louis E. Brus

Louis Eugene Brus (August 10, 1943 – January 11, 2026) was an American chemist, and the Samuel Latham Mitchell Professor of Chemistry at Columbia University. He was the co-discoverer of the colloidal semi-conductor nanocrystals known as quantum dots. In 2023, he was awarded the Nobel Prize in Chemistry.

Early life and education Louis Eugene Brus was born in Cleveland, Ohio, on August 10, 1943. During high school in Roeland Park, Kansas, he developed an interest for chemistry and physics.

He entered Rice University in 1961 with a Naval Reserve Officers Training Corps (NROTC) college scholarship, which required him to participate in NROTC activities at sea as a midshipman. In 1965, he graduated at Rice with a B.S. degree in chemical physics, and then moved to Columbia University for his doctoral research. He was independently the first to synthesize them in a solution in 1982. At the time, he was studying organic photochemistry on cadmium sulfide particle surfaces using pump–probe Raman spectroscopy, looking for possible applications for solar-energy. He noticed that the optical properties of the crystals changed after leaving them for 24 hours. now known as the Brus equation.

Brus tried to contact researchers in the Soviet Union. It was in 1990, that he finally met Alexey Ekimov and Alexander Efros, who had first developed the semiconductor nanocrystals in glass in 1981 under more rudimentary conditions, however their research was not available in the United States.

Death Brus died of myelodysplastic syndrome in Hastings-on-Hudson, New York on January 11, 2026, at the age of 82.

Awards and honors Brus was elected a fellow of the American Academy of Arts and Sciences in 1998, a member of the United States National Academy of Sciences in 2004, and was a member of the Norwegian Academy of Science and Letters.

He received the Distinguished Alumni Award from the Association of Rice University Alumni in 2010. He was co-recipient of the 2006 R. W. Wood Prize of the Optical Society of America "for the discovery of nanocrystal quantum dots and pioneering studies of their electronic and optical properties" shared with Alexander Efros and Alexey Ekimov. He also received the inaugural Kavli Prize for nanoscience along with Sumio Iijima in 2008 for "their large impact in the development of the nanoscience field of the zero and one dimensional nanostructures in physics, chemistry and biology". In 2009 he was awarded the Willard Gibbs Award "for his leading role in the creation of chemical quantum dots". Brus was chosen for the 2010 NAS Award in Chemical Sciences. In 2012 he received the Franklin Institute's Bower Award and Prize for Achievement in Science, and was selected as a Clarivate Citation laureate in Chemistry "for discovery of colloidal semiconductor nanocrystals (quantum dots)".

In 2023, Brus was awarded the Nobel Prize in Chemistry jointly with Ekimov and Moungi Bawendi "for the discovery and synthesis of quantum dots". Bawendi had worked as a postdoc with Brus, when they were in Bell Labs.

He was inducted as a 2025 fellow of the National Academy of Inventors.

Selected publications