Synthesis and characterization of chalcogenide nanomaterials

The development of solution routes to metal chalcogenide nanomaterials, such as the alkaline earths (AEE, where AE = Ca, Sr, Ba and E = S, Se, Te) and cadmium (CdE), are of interest for a variety of optical applications. For instance, AEEs are under investigation for use as infrared-sensitive phosphors and windows, and photoluminophosphors, while CdEs have found utility in bioimaging, photonics, solid-state lighting, and solar cell devices. Missing from these material's synthetic routes is demonstrated control over the final nanoparticle properties. Solution routes to generate these materials allow for control over variables that influence particle size, shape and morphology. Recently, we have developed a new solution precipitation route to synthesize AEE and CdE nanoparticles which use highly soluble alkaline earth amides and alkoxide (i.e., neo-pentoxide and aryloxide) derivates as precursors. These precursors were thermally decomposed in trioctylphosphine oxide (TOPO) and trioctylphosphine (TOP). Full details on the synthesis and characterization of the precursors and nanomaterials will be presented.