Self-organizations of nanocrystals (Ag 2 S, Ag, Co, Au, CdSe) have been reported during the past decade. It is possible to make highly ordered spherical nanocrystals in compact hexagonal networks 1 ...

Left to right: Peng Peng, Simon Cherry and Chih-Chieh Liu from the University of California, Davis. The spatial resolution of a PET image is mainly determined by the size of the scintillation crystals ...

Flurries of questions about mysterious triangle-shaped snowflakes may soon subside, thanks to new research on snowflake formation. Most snowflakes are hexagons ...