Detection of DNA Bases via Field Effect Transistor of Graphene Nanoribbon with a Nanopore: Semi-empirical Modeling.

摘要: DNA sequencing techniques are critical in order to investigate genes' functions. Obtaining fast, accurate, and affordable bases detection makes it possible acquire personalized medicine. In this article, a semi-empirical technique is used calculate the electron transport characteristics of developed z-shaped graphene device detect bases. The transistor consists pair zigzag nanoribbon (ZGNR) connected through an armchair (AGNR) channel with nanopore where nucleobases positioned. Non-equilibrium Green's function (NEGF) integrated methodologies employed analyze different electronic characteristics. approach applied extension extended Huckel (EH) method self-consistent (SC) Hartree potential. By employing NEGF+SC-EH, proved that each one four positioned within nanopore, hydrogen passivated edge carbon atoms, results unique electrical signature. Both current signal transmission spectrum measurements inside device's pore studied for modification their orientation lateral translation. Moreover, noise effect various factors studied. sensor sensitivity improved by using nitrogen instead passivate adding dual gate surround central semiconducting nanoribbon.