Moungi G. Bawendi, Louis E. Brus and Alexei I. Ekimov have been awarded the 2023 Nobel Prize in Chemistry for discovering a category of such minute marvels, now known as “Quantum Dots”, and for developing a precise method of synthesizing them. Quantum dots are already playing important roles in electronics and in biomedicine, such as in drug delivery, imaging and medical diagnoses, and have more promising applications in the future, the Nobel Committee for Chemistry said in its announcement of the prize. Quantum dots, sometimes called artificial atoms, are precise nanocrystals made of silicon and other semiconductor materials that are just a few nanometers wide — small enough to exhibit quantum properties just as individual atoms do, although they are a hundred to a few thousand atoms in size. Because electrons can be trapped at certain energy levels within them, the nanocrystals can emit only certain wavelengths of light. By controlling the size of the particles, researchers can program precisely what color the quantum dots will flash when stimulated. Quantum Dots are human-made nanoparticles so small that their properties are governed by quantum mechanics. Those properties include the emission of light: The wavelength of light they emit depends solely on the size of the particles. Electrons in larger particles have less energy and emit red light, whereas electrons in smaller particles have more energy and emit blue light. SheQuantum salutes the laureates Moungi G. Bawendi, Louis E. Brus and Alexei I, for winning the Nobel Prize this year and for being an inspiration to many in the quantum community!
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