▎ 摘　　要

Graphene nanopores (GNPs) hold great promise as sensors for biological and chemical sensing applications because of their potential in achieving ultra-high sensitivity and sizeable operating currents. However, it remains a challenging task to realize the full potential of GNP sensors in real biological and chemical environment because of strong noise and interference. Here we propose a new GNP based sensor that consists of two conduction units. Due to the opening of additional conductive channels and enhanced transmission pathways around the nanopore, the proposed gapped-GNP structure is shown to operate with significantly improved conductivity and sensitivity over standard GNPs. The proposed device shows promise in dealing with noise and interference observed in practice. (c) 2014 AIP Publishing LLC.