Nanostructured thermoelectric materials and devices

A multi-element quantum dot superlattice device comprising:

• a first quantum dot superlattice element;
• and
• a second quantum dot superlattice element, said second quantum dot superlattice element directly bonded to said first quantum dot suprelattice element in a pre-determined physical orientation selected to match sample geometries of said first and second quantum dot superlattice elements and to reduce a radiation loss factor of said device, said second quantum dot superlattice element in thermal communication with said first quantum dot superlattice element.