The tiny crystals, only a few nanometres in size, have applications in computing, lasers and microscopy
has been given to three developers of quantum dots – particles so small that their electrical and optical properties are influenced by quantum physics.at Columbia University and Alexei Ekimov at Nanocrystals Technology, both in New York, who discovered the technology in the 1980s while working separately. The third winner isat the Massachusetts Institute of Technology in Boston, who developed better techniques for making the dots, which are also known as semiconductor nanocrystals.
The crystals are made from compounds such as lead sulphide or cadmium selenide and are only a few nanometres in size – or about one thousandth the width of a human hair.Because the crystals are so small, they have properties somewhere between individual atoms, which are governed by the laws ofWithin quantum dots, electrons can only occupy discrete energy levels, which means that if excited, they emit light at specific wavelengths, depending on the properties of the crystal.
France Dernières Nouvelles, France Actualités
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