Quantum dots are tiny nanocrystals with extraordinary
optical and electrical properties with possible uses in dye production,
bioimaging, and solar energy production. Researchers at the University of
Illinois at Chicago have developed a way to introduce precisely four copper
ions into each and every quantum dot.
The introduction of these “guest” ions, called doping, opens
up possibilities for fine-tuning the optical properties of the quantum dots and
producing spectacular colors.