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UO's Department of Chemistry and Biochemistry's Organic/Inorganic Seminar series will Susan M. Kauzlarich from UC Davis to give a seminar on "Synthesis and Characterization of Zintl Phases and Ge Nanocrystals for Thermoelectrics and Photovoltaic Applications"
UO: KLA 331
OSU: Gilbert 324
Abstract: There are many areas of science where progress is materials limited. The synthesis and identification of new compounds that can lead to enhancements in existing technologies, or serve as the basis of revolutionary new technologies, is essential for developing new and improved technologies. Three different research concepts will be presented, highlighting novel bulk and nanostructure materials for energy: Zintl compounds, Nanocomposites, and Ge nanoparticles. Zintl compounds can be described by a combination of ionic and covalent bonding, composed of electropositive cations which donate electrons to the more electronegative components that utilize the electrons to form various bonding motifs. My group has focused on Zintl compounds for their structural, chemical, and electronic properties and I will present research on Zintl phases for thermoelectric applications such as waste heat to electrical power conversion. Microwave assisted synthesis has gained popularity over the last decade for the preparation of a variety of inorganic nanocrystals primarily due to its clean and energy efficient nature. Recently, we have focused on the preparation of Group IV semiconducting nanoparticles (Ge, Si) targeting applications in the field of photovoltaics. We have developed a simple approach for the preparation of crystalline Ge nanoparticles with control on size by microwave assisted heating. I will present our efforts to probe the electronic properties of the Ge nanocrystals as a function of their size.