||Artificial molecules built from colloidal nanocrystals
Colloidal nanocrystals can be thought of as artificial atoms, or units with controllable density of electronic states. In recent years we have been working on coupled colloidal nanocrystals, to create artificial molecules. One example involves branched nanocrystals, such as tetrapods, the individual branches of which can be wired up into a transistor. A more recent example involves the creation of regularky spaced colloidal quantum dots within a rod shaped semiconductor nanocrystal. In both cases, we are able to observe in solution-grown materials some interesting condensed matter physics previously observed in materials produced by much more exotic methods.