Various synthetic routes have been developed by prvious researchers to produce monodispersed nanocrystals with size and shape tunability. However in many cases, large amount of expensive, and hazardous reagents were often used in the synthetic process. These were major hudles of commerciallization. Herein, we report simple synthetic route to produce metal sulfide nanocrystals using elemental liquid sulfur which is cheaper and more environmetally friendly than any other conventional organic solvent used previously. In our synthetic process, Liquid sulfur acts as a solvent and concurrently as a sulfur source. Addition of metal precursors/oleylamine solution into the liquid sulfur at 130~180? leads to the formation of uniform size metal sulfide nanocrystals. We will clarify the mechanism of these reactions by controlling the concentrations and temperature, and then confirm the rolls of each reagent. Consequentially, the optimized conditions for monodispersed nanocrystals will be proposed. In addition, we will demonstrate the optical properties of these nanocrystals via various characterization methods.

Liquid sulfur as an unconventional medium for the synthesis of semiconductor nanocrystals and polymeric nanocomposites

244th National Meeting (2012)

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