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The success of graphene for nanopore DNA sequencing has shown that it ispossible to explore other potential single-atom and few-atom thick layers ofelemental 2D materials beyond graphene (e.g., phosphorene and silicene). Usingdensity functional theory, we studied the interaction of DNA bases withnanopores created in finite-size nanoribbons from graphene, phosphorene, andsilicene. We observe that binding energies of DNA bases using nanopores fromphosphorene and silicene are generally smaller compared to graphene. The bandgaps of phosphorene and silicene are significantly altered due to interactionwith DNA bases compared to graphene. Our findings show that phosphorene andsilicene are promising alternatives to graphene for DNA base detection usingadvanced detection principles such as transverse tunneling current measurement.

Identification of DNA Bases Using Nanopores Created in Finite-Size Nanoribbons from Graphene, Phosphorene, and Silicene