With the support of the Macromolecular, Supramolecular and Nanochemistry Program, Professor Jonathan Owen of Columbia University is studying a new strategy to synthesize nanometer scale semiconductor crystals that convert blue light-emitting diode (LED) light into red emission. A “redox conversion” process will use low-valent gallium and indium precursors together with phosphorus and arsenic reagents to grow nanoscale particles in more widely accessible surfactant solution. If successful, this research will produce cadmium-free materials for energy-efficient lighting and infrared detectors, while training high school, undergraduate, and graduate students in cutting-edge synthesis and spectroscopy. With the support of the Macromolecular, Supramolecular and Nanochemistry Program, Professor Jonathan Owen of Columbia University is studying a novel colloidal synthesis strategy to prepare III–V quantum dot heterostructures with controlled crystallinity, size, and composition. GaP, GaAs, InGaP alloys, and InP/GaP core/shell architectures will be synthesized by pairing Ga(I) and In(I) complexes with tailored phosphine, phosphite, and phosphonium reagents. The resulting nanocrystals will be rigorously characterized by synchrotron X-ray total scattering and pair distribution function analysis, Raman spectroscopy, solid-state ³¹P Nuclear Magnetic Resonance, ultraviolet photoelectron spectroscopy, electron microscopy, and photoluminescence measurements to assess defect density, phase