Graphite versus graphene: plasmonic nanopore DNA sequencing

The plasmonic-based graphite- and graphene-nanopores have been investigated by employing the hybrid quantum/classical scheme (HQCS). Transverse, longitudinal, and total absorption spectra obtained from HQCS are analyzed for the graphite and graphene nanopores. Analyses were examined for each structure in the presence of deoxyribonucleic acid (DNA) nucleobases. The simple excitation of the total mode in graphene nanopore shows the best selectivity for DNA sequencing. A novel method based on the transverse and longitudinal modes in a time-series approach has been proposed for selectivity improvements. In the proposed time-series method, the outstanding results show that graphite nanopore is more sensitive than and as selective as graphene nanopore. This paper suggests that time-step analysis of the plasmonic absorption in the graphite nanopore is a promising method for DNA sequencing.