Integrating molecules with silicon is of great interest for applications in molecular electronics, for passivation of silicon surfaces for solar fuel generation, and yet further miniaturization of feature sizes of transistors on silicon into the sub-10 nm regime. he formation of silicon-carbon bonds via hydrosilylation is a practical and commonly used approach to chemically functionalize the surface of silicon due to the stability of the Si-C bond. There is a surprisingly diverse array of distinct mechanisms, and hence reaction conditions, that can be harnessed to enable this chemistry. Research over the past two decades has shown, however, that the mechanisms in operation are far more diverse, and the chemistry much richer, than initially believed. The underlying electronics of the silicon play an important role in enabling the chemistry of the surface, and under many circumstances, can dominate. We will discuss the latest developments in the surface chemistry of silicon that provide practical avenues for exquisitely precise integration of molecules with silicon surfaces. From the use of surface plasmons to bonding via exotic elements (such as Si-S,Si-Se, Si-Te bonds), silicon continues to surprise.

Connecting the mechanistic chemistry of molecular silanes and silicon surfaces

ACS Spring Meeting 2021

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