The push for next generation electronics to be smaller and more efficient has created an increased interest in covalent networks and monolayer surfaces. These materials have the potential to be as thin as one atom while still having the ability to carry current with little resistance. These two-dimensional templates also serve as a base for more intricate functional surfaces. Self assembly is a common method in the development of low-dimensional materials due to ease of preparation. Combining self assembly with the Ullmann surface reaction, a synthetic technique used to couple aryl halides via copper catalysis, can provide more control over the synthesis of these surfaces. We use LT-UHV scanning tunneling microscopy to study covalent networks of dibromobenzene mixed-monolayer systems on Au(111) created through self-assembly and Ullmann-like coupling.  Future experiments will include tip-induced molecular manipulation and reactions, which can aid in the formation of new bonds and specific atomic patterns and arrangements.

Ullmann-like surface reactions and self-assembly of dibromobenzenes and dibromo-bithiophenes

256th National Meeting (2018)

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