MIT chemical engineering graduate student Mark Weidman and colleagues demonstrate how to synthesize lead sulfide nanocrystals of uniform size.
A. Jolene Mork, a fifth-year MIT graduate student in chemistry, and Mark C. Weidman, a fourth-year MIT chemical engineering graduate student, work with an array of mirrors and lenses coupled to a laser that directs a light beam to a microscope (not shown) for carrying out time-resolved photoluminescence spectroscopy experiments in the Tisdale Lab at MIT. Photo: Denis Paiste, Materials Processing Center