This work covers a new route to stoichiometric low chalcocite copper(I) sulfide nanorods without the need for cation exchange. Nanorods are formed through the oriented attachment of seed nanocrystals with crystal-bound thiols facilitated by 1,2-hexadecanediol (HDD). Evidence suggests that rather than acting as a reducing agent, the HDD serves as a nanocrystal stabilizer. Nanorod syntheses attempted without HDD result in ripened and aggregated particles, while reactions performed with an excess of HDD result in solitary unaltered nanocrystals. When the optimal concentration is used, HDD coordinates to the reactive c-axis facets limiting seed ripening and disordered aggregation, without hindering oriented attachment. XPS analysis reveals similar surface chemistry and XRD verifies the same crystal structure between the seed nanocrystals and the final nanorod product.

Controlled surface chemistry for the directed attachment of copper(I) sulfide nanocrystals

254th National Meeting (2017)

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