Tuning collective properties of artificial nanoparticle "supercrystals"

April 1, 2011

Researchers utilizing the U.S. Department of Energy's Advanced Photon Source at Argonne National Laboratory have reported on the first combined quasi-hydrostatic, high-pressure, small-angle X-ray scattering and micro X-ray diffraction studies of individual faceted, three-dimensional supercrystals self-assembled from colloidal 7.0-nm PbS nanocrystals, information that could lead to improved control of the magnetic, optical, and electronic coupling between the individual nanocrystals, which can produce useful collective properties (such as vibrational coherence, enhanced conductivity, and spin-dependent electron transport) that have potential applications in solar cells, field-effect transistors, light-emitting devices, photodetectors, and photoconductors. More ยป