In 1932, H. P. Rocksby 1 discovered that the red or yellow color of some silicate glasses could be linked to microscopic inclusions of CdSe and CdS. It was not until 1985 when these changes in color were linked to the energy states determined by quantum confinement in these CdS or CdSe quantum dots 2 . Since that time, the number of experimental studies of quantum dots has literally exploded, stimulated, in particular, by the development of mature Molecular Beam Epitaxy technology, which rapidly became the technology of choice for growing quantum dots in different materials systems.
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Borovitskaya et al. (2002) studied this question.