Quantum charge transport in DNA and RNA systems coupled to nanoribbon electrodes

The current-voltage behavior of three DNA nanowire models, which consist of a fishbone structure and two separate double-chain setups, alongside an RNA model illustrated by a half-ladder configuration, is examined using zigzag carbon nanotubes and associated metallic armchair graphene nanoribbon electrodes. This study utilizes the tight-binding Hamiltonian technique within the Landauer-Büttiker theory. The different DNA and RNA nanowire models exhibit nonlinear current-voltage characteristics, which are calculated and analyzed based on the corresponding transmission probability. The findings show that the current-voltage properties are affected by the type of leads and their working temperature, with zigzag nanotubes producing somewhat greater currents than nanoribbon electrodes. With a near-zero bias at the electrodes, the current-voltage characteristics are influenced by the dimerization effects of longitudinal hopping in the devices. Due to the expected strong connection between electronic transport characteristics and the structures of DNA and RNA, these results might stimulate additional investigation into their biological importance for nanoelectronic devices.